Central Taxonomic Thesaurus

Taxon Search
  Plantae
      Magnoliophyta
             [Angiospermae]
         Eudicots
             Core Eudicots
               Asterids
               Campanulids
                    Asterales
                            Asteraceae
                                   [Compositae]
                                     Abrotanella
                                     Acamptopappus
                                           [Sphaerocephala]
                                             Acamptopappus microcephalus
                                             Acamptopappus shockleyi
                                             Acamptopappus sphaerocephalus
                                               Acamptopappus sphaerocephalus var. hirtellus
                                               Acamptopappus sphaerocephalus var. sphaerocephalus
                                                     [Aplopappus sphaerocephalus]
                                     Acanthocladium
                                             Acanthocladium carlottae
                                     Acanthospermum
                                             Acanthospermum australe
                                             Acanthospermum hispidum
                                             Acanthospermum humile
                                             Acanthospermum xanthioides
                                     Acanthostyles
                                             Acanthostyles buniifolius
                                     Acanthoxanthium
                                     Achaetogeron
                                             Achaetogeron affinis
                                             Achaetogeron mexicanus
                                             Achaetogeron palmeri
                                             Achaetogeron pinnatifidus
                                             Achaetogeron purpurascens
                                     Achillea
                                             Achillea aegyptiaca
                                             Achillea ageratifolia
                                             Achillea ageratum
                                             Achillea alpina
                                                   [Achillea sibirica]
                                             Achillea atrata
                                             Achillea biserrata
                                             Achillea cartilaginea
                                             Achillea chrysocoma
                                             Achillea clavennae
                                             Achillea clusiana
                                             Achillea clypeolata
                                             Achillea collina
                                             Achillea conferta
                                             Achillea crithmifolia
                                             Achillea dentifera
                                             Achillea distans
                                               Achillea distans ssp. tanacetifolia
                                             Achillea erba-rotta
                                               Achillea erba-rotta ssp. rupestris
                                             Achillea filipendulina
                                             Achillea fragrantissima
                                             Achillea grandifolia
                                             Achillea impatiens
                                             Achillea ligustica
                                             Achillea lingulata
                                             Achillea macrocephala
                                             Achillea macrophylla
                                             Achillea magna
                                             Achillea millefolium
                                                   [Achillea alpicola]
                                                   [Achillea angustissima]
                                                   [Achillea arenicola]
                                                   [Achillea aspleniifolia]
                                                   [Achillea borealis ssp. arenicola]
                                                   [Achillea borealis ssp. californica]
                                                   [Achillea borealis ssp. typica]
                                                   [Achillea borealis var. arenicola]
                                                   [Achillea borealis var. californica]
                                                   [Achillea borealis]
                                                   [Achillea californica]
                                                   [Achillea eradiata]
                                                   [Achillea fusca]
                                                   [Achillea gigantea]
                                                   [Achillea gracilis]
                                                   [Achillea lanulosa ssp. alpicola]
                                                   [Achillea lanulosa ssp. typica]
                                                   [Achillea lanulosa var. alpicola]
                                                   [Achillea lanulosa var. arachnoidea]
                                                   [Achillea lanulosa var. eradiata]
                                                   [Achillea lanulosa]
                                                   [Achillea laxiflora]
                                                   [Achillea millefolium ssp. atrotegula]
                                                   [Achillea millefolium ssp. borealis]
                                                   [Achillea millefolium ssp. lanulosa]
                                                   [Achillea millefolium ssp. occidentalis]
                                                   [Achillea millefolium ssp. pallidotegula]
                                                   [Achillea millefolium var. alpicola]
                                                   [Achillea millefolium var. arenicola]
                                                   [Achillea millefolium var. aspleniifolia]
                                                   [Achillea millefolium var. borealis]
                                                   [Achillea millefolium var. californica]
                                                   [Achillea millefolium var. fulva]
                                                   [Achillea millefolium var. fusca]
                                                   [Achillea millefolium var. gigantea]
                                                   [Achillea millefolium var. gracilis]
                                                   [Achillea millefolium var. lanulosa]
                                                   [Achillea millefolium var. litoralis]
                                                   [Achillea millefolium var. maritima]
                                                   [Achillea millefolium var. megacephala]
                                                   [Achillea millefolium var. nigrescens]
                                                   [Achillea millefolium var. occidentalis]
                                                   [Achillea millefolium var. pacifica]
                                                   [Achillea millefolium var. parviligula]
                                                   [Achillea millefolium var. parvula]
                                                   [Achillea millefolium var. puberula]
                                                   [Achillea millefolium var. rosea]
                                                   [Achillea millefolium var. russeolata]
                                                   [Achillea nigrescens]
                                                   [Achillea occidentalis]
                                                   [Achillea pacifica]
                                                   [Achillea puberula]
                                                   [Achillea rosea]
                                                   [Achillea subalpina]
                                                   [Achillea tomentosa]
                                               Achillea millefolium var. millefolium
                                             Achillea multiflora
                                             Achillea nobilis
                                             Achillea odorata
                                             Achillea pannonica
                                             Achillea ptarmica
                                               Achillea ptarmica ssp. macrocephala
                                             Achillea pyrenaica
                                             Achillea rupestris
                                             Achillea santolina
                                             Achillea setacea
                                             Achillea tanacetifolia
                                             Achillea taygetea
                                             Achillea umbellata
                                     Achyrachaena
                                             Achyrachaena mollis
                                     Achyrocline
                                             Achyrocline deflexa
                                             Achyrocline flaccida
                                             Achyrocline satureioides
                                     Achyropappus
                                             Achyropappus anthemoides
                                     Achyrophorus
                                             Achyrophorus roseus
                                     Acilepidopsis
                                             Acilepidopsis echitifolia
                                     Acmella
                                             Acmella alpestris
                                             Acmella bellidioides
                                             Acmella brachyglossa
                                             Acmella decumbens
                                             Acmella filipes
                                             Acmella glaberrima
                                             Acmella iodiscaea
                                             Acmella lundellii
                                             Acmella oleracea
                                             Acmella oppositifolia
                                               Acmella oppositifolia var. oppositifolia
                                               Acmella oppositifolia var. repens
                                             Acmella pilosa
                                             Acmella pusilla
                                             Acmella radicans
                                               Acmella radicans var. debilis
                                               Acmella radicans var. radicans
                                             Acmella repens
                                             Acmella sodiroi
                                             Acmella uliginosa
                                     Acosta
                                     Acourtia
                                             Acourtia alamanii
                                             Acourtia carpholepis
                                             Acourtia cordata
                                             Acourtia coulteri
                                             Acourtia cuernavacana
                                             Acourtia dieringeri
                                             Acourtia discolor
                                             Acourtia dugesii
                                             Acourtia durangensis
                                             Acourtia fragrans
                                             Acourtia fruticosa
                                             Acourtia gentryi
                                             Acourtia glomeriflora
                                             Acourtia grandifolia
                                             Acourtia hebeclada
                                             Acourtia hintoniorum
                                             Acourtia huajuapana
                                               Acourtia huajuapana var. actinomorpha
                                             Acourtia humboldtii
                                             Acourtia lozanii
                                             Acourtia macrocephala
                                             Acourtia michoacana
                                             Acourtia microcephala
                                                   [Perezia microcephala]
                                             Acourtia montana
                                             Acourtia nana
                                                   [Perezia nana]
                                             Acourtia nudicaulis
                                             Acourtia palmeri
                                             Acourtia parryi
                                             Acourtia patens
                                             Acourtia pilulosa
                                             Acourtia pinetorum
                                             Acourtia platyphylla
                                             Acourtia pringlei
                                             Acourtia purpusii
                                             Acourtia reticulata
                                             Acourtia rigida
                                             Acourtia runcinata
                                                   [Perezia runcinata]
                                             Acourtia rzedowskii
                                             Acourtia scapiformis
                                             Acourtia simulata
                                             Acourtia sinaloana
                                             Acourtia tenoriensis
                                             Acourtia thurberi
                                                   [Acourtia mexicana]
                                                   [Perezia thurberi]
                                             Acourtia thyrsoidea
                                             Acourtia turbinata
                                             Acourtia wislizeni
                                             Acourtia wrightii
                                                   [Perezia wrightii]
                                     Acrisione
                                             Acrisione cymosa
                                     Acritopappus
                                             Acritopappus confertus
                                     Acroclinium
                                             Acroclinium roseum
                                     Acroptilon
                                             Acroptilon repens
                                                   [Centaurea picris]
                                                   [Centaurea repens]
                                     Actinea
                                             Actinea herbacea
                                             Actinea leptoclada
                                             Actinea linearifolia
                                             Actinea odorata
                                             Actinea osterhoutii
                                             Actinea richardsonii
                                               Actinea richardsonii var. floribunda
                                             Actinea scaposa
                                     Actinella
                                             Actinella biennis
                                     Actinolepis
                                             Actinolepis multicaulis
                                     Actinomeris
                                             Actinomeris helianthoides
                                               Actinomeris helianthoides var. elliottii
                                               Actinomeris helianthoides var. nuttallii
                                             Actinomeris heterophylla
                                             Actinomeris nudicaulis
                                             Actinomeris oppositifolia
                                             Actinomeris pauciflora
                                             Actinomeris squarrosa
                                             Actinomeris wrightii
                                     Actinospermum
                                             Actinospermum angustifolium
                                     Addisonia
                                     Adenocaulon
                                             Adenocaulon bicolor
                                     Adenocritonia
                                     Adenopappus
                                             Adenopappus persicaefolius
                                     Adenophyllum
                                             Adenophyllum anomalum
                                             Adenophyllum cancellatum
                                                   [Adenophyllum porophyllum var. cancellatum]
                                                   [Dyssodia cancellata]
                                             Adenophyllum coccineum
                                             Adenophyllum cooperi
                                                   [Dyssodia cooperi]
                                             Adenophyllum porophylloides
                                                   [Dyssodia porophylloides]
                                             Adenophyllum porophyllum
                                                   [Dyssodia porophylla]
                                                   [Dyssodia porophyllum]
                                                   [Pteronia porophylla]
                                             Adenophyllum speciosum
                                             Adenophyllum wrightii
                                                   [Dyssodia neomexicana]
                                                   [Hymenatherum neomexicanum]
                                               Adenophyllum wrightii var. wrightii
                                             Adenophyllum yecoranum
                                     Adenostemma
                                             Adenostemma berteroi
                                             Adenostemma brasilianum
                                             Adenostemma lanceolatum
                                             Adenostemma lavenia
                                             Adenostemma verbesina
                                             Adenostemma viscosum
                                     Adenothamnus
                                             Adenothamnus validus
                                     Aegialophila
                                             Aegialophila pumila
                                     Aequatorium
                                     Aetheolaena
                                     Agassizia
                                     Ageratella
                                             Ageratella microphylla
                                               Ageratella microphylla var. sonorana
                                     Ageratina
                                             Ageratina adenophora
                                                   [Eupatorium adenophorum]
                                                   [Eupatorium glandulosum]
                                             Ageratina altissima
                                               Ageratina altissima var. altissima
                                               Ageratina altissima var. angustata
                                               Ageratina altissima var. roanensis
                                                     [Eupatorium roanense]
                                                     [Eupatorium rugosum var. roanense]
                                                     [Eupatorium urticifolium var. tomentellum]
                                                     [Eupatorium urticifolium]
                                             Ageratina areolaris
                                             Ageratina aromatica
                                               Ageratina aromatica var. aromatica
                                               Ageratina aromatica var. incisa
                                             Ageratina arsenei
                                             Ageratina astellera
                                             Ageratina atrocordata
                                             Ageratina bellidifolia
                                             Ageratina blepharilepis
                                             Ageratina brevipes
                                             Ageratina bustamenta
                                             Ageratina calaminthaefolia
                                             Ageratina calaminthifolia
                                             Ageratina calophylla
                                             Ageratina campyloclada
                                             Ageratina capillipes
                                             Ageratina cardiophylla
                                             Ageratina chiapensis
                                             Ageratina choricephala
                                             Ageratina ciliata
                                             Ageratina collodes
                                             Ageratina conspicua
                                             Ageratina corylifolia
                                             Ageratina cremasta
                                             Ageratina cronquistii
                                             Ageratina cylindrica
                                             Ageratina deltoidea
                                             Ageratina dictyoneura
                                             Ageratina espinosara
                                             Ageratina espinosarum
                                             Ageratina gentryana
                                             Ageratina glabrata
                                             Ageratina glauca
                                             Ageratina glischra
                                             Ageratina gypsophila
                                             Ageratina havanensis
                                                   [Eupatorium havanense]
                                                   [Eupatorium texense]
                                             Ageratina hebes
                                             Ageratina henzium
                                             Ageratina herbacea
                                                   [Ageratina betulaefolia]
                                                   [Eupatorium herbaceum]
                                             Ageratina hidalgensis
                                             Ageratina hyssopina
                                             Ageratina illita
                                             Ageratina irrasa
                                             Ageratina isolepis
                                             Ageratina jucunda
                                             Ageratina lasioneura
                                             Ageratina lemmonii
                                                   [Eupatorium lemmonii]
                                             Ageratina liebmannii
                                             Ageratina ligustrina
                                             Ageratina luciae-brauniae
                                             Ageratina lucida
                                             Ageratina mairetiana
                                             Ageratina malacolepis
                                             Ageratina miquihuana
                                             Ageratina muelleri
                                             Ageratina occidentalis
                                                   [Eupatorium occidentale]
                                             Ageratina oreithales
                                             Ageratina palmeri
                                             Ageratina paucibracteata
                                             Ageratina paupercula
                                                   [Eupatorium pauperculum]
                                             Ageratina pazcuarensis
                                             Ageratina petiolaris
                                             Ageratina pichinchensis
                                             Ageratina potosina
                                             Ageratina pringlei
                                             Ageratina purpusii
                                             Ageratina resiniflua
                                             Ageratina rhomboidea
                                             Ageratina riparia
                                             Ageratina rollinsii
                                             Ageratina rothrockii
                                                   [Eupatorium rothrockii var. shrevei]
                                                   [Eupatorium rothrockii]
                                             Ageratina rupicola
                                                   [Eupatorium rupicola]
                                             Ageratina saltillensis
                                             Ageratina sandersii
                                             Ageratina scorodonioides
                                             Ageratina seleri
                                             Ageratina shastensis
                                             Ageratina sousae
                                             Ageratina stricta
                                             Ageratina thyrsiflora
                                             Ageratina tomentella
                                             Ageratina tristis
                                             Ageratina venulosa
                                             Ageratina viburnoides
                                             Ageratina viscosissima
                                             Ageratina warnockii
                                             Ageratina wrightii
                                                   [Eupatorium wrightii]
                                             Ageratina yecorana
                                     Ageratum
                                             Ageratum albidum
                                             Ageratum callosum
                                             Ageratum conyzoides
                                               Ageratum conyzoides subsp. conyzoides
                                             Ageratum corymbosum
                                                   [Ageratum guatemalense]
                                               Ageratum corymbosum var. longipetiolatum
                                             Ageratum domingense
                                             Ageratum echioides
                                             Ageratum gaumeri
                                             Ageratum houstonianum
                                             Ageratum isocarphoides
                                             Ageratum latifolium
                                             Ageratum littorale
                                             Ageratum lucidum
                                             Ageratum maritimum
                                             Ageratum paleaceum
                                             Ageratum peckii
                                             Ageratum riparium
                                             Ageratum salicifolium
                                             Ageratum strictum
                                             Ageratum tehuacanum
                                             Ageratum tomentosum
                                     Agnorhiza
                                             Agnorhiza bolanderi
                                             Agnorhiza elata
                                             Agnorhiza invenusta
                                             Agnorhiza ovata
                                                   [Wyethia ovata]
                                             Agnorhiza reticulata
                                     Agoseris
                                             Agoseris alpestris
                                             Agoseris apargioides
                                               Agoseris apargioides ssp. maritima
                                               Agoseris apargioides var. apargioides
                                               Agoseris apargioides var. eastwoodiae
                                               Agoseris apargioides var. maritima
                                             Agoseris arachnoidea
                                             Agoseris attenuata
                                             Agoseris aurantiaca
                                               Agoseris aurantiaca var. aurantiaca
                                               Agoseris aurantiaca var. purpurea
                                                     [Agoseris aurantiaca ssp. purpurea]
                                                     [Agoseris glauca var. cronquistii]
                                                     [Agoseris graminifolia]
                                             Agoseris barbellulata
                                             Agoseris cinerea
                                             Agoseris dasycarpa
                                             Agoseris eastwoodiae
                                             Agoseris elata
                                             Agoseris frondifera
                                             Agoseris glauca
                                               Agoseris glauca var. agrestis
                                                     [Agoseris agrestis]
                                               Agoseris glauca var. dasycephala
                                                     [Agoseris glauca ssp. scorzonerifolia]
                                                     [Agoseris glauca var. asper]
                                                     [Agoseris glauca var. pumila]
                                                     [Agoseris glauca var. villosa]
                                                     [Agoseris isomeris]
                                                     [Agoseris pumila]
                                                     [Agoseris scorzonerifolia var. aspera]
                                                     [Agoseris scorzonerifolia]
                                                     [Agoseris villosa]
                                                     [Troximon glaucum var. dasycephalum]
                                                     [Troximon glaucum var. pumilum]
                                               Agoseris glauca var. glauca
                                                     [Agoseris turbinata]
                                                     [Troximon glaucum]
                                             Agoseris grandiflora
                                                   [Agoseris laciniata]
                                                   [Agoseris plebeja]
                                                   [Troximon grandiflorum]
                                               Agoseris grandiflora var. grandiflora
                                               Agoseris grandiflora var. leptophylla
                                             Agoseris heterophylla
                                                   [Troximon chilense]
                                                   [Troximon heterophyllum]
                                               Agoseris heterophylla ssp. heterophylla
                                               Agoseris heterophylla var. crenulata
                                               Agoseris heterophylla var. cryptopleura
                                               Agoseris heterophylla var. heterophylla
                                                     [Agoseris heterophylla ssp. californica]
                                                     [Agoseris heterophylla ssp. normalis]
                                                     [Agoseris heterophylla var. kymapleura]
                                                     [Macrorhynchus heterophyllus]
                                               Agoseris heterophylla var. quentinii
                                               Agoseris heterophylla var. turgida
                                             Agoseris hirsuta
                                             Agoseris humilis
                                             Agoseris intermedia
                                             Agoseris lackschewitzii
                                             Agoseris leptocarpa
                                             Agoseris maculata
                                             Agoseris maritima
                                             Agoseris montana
                                             Agoseris monticola
                                                   [Agoseris glauca var. monticola]
                                             Agoseris parviflora
                                                   [Agoseris caudata]
                                                   [Agoseris glauca var. laciniata]
                                                   [Agoseris taraxacoides]
                                                   [Troximon glaucum var. laciniatum]
                                             Agoseris retrorsa
                                                   [Macrorhynchus retrorsus]
                                             Agoseris roseata
                                             Agoseris rostrata
                                             Agoseris taraxacifolia
                                             Agoseris x elata
                                     Ajania
                                             Ajania khartensis
                                             Ajania tenuifolia
                                     Albertinia
                                     Alcina
                                     Aldama
                                             Aldama dentata
                                     Alepidocline
                                             Alepidocline trifida
                                     Alloispermum
                                             Alloispermum integrifolium
                                             Alloispermum palmeri
                                               Alloispermum palmeri var. lancifolium
                                             Alloispermum scabrifolium
                                             Alloispermum scabrum
                                     Almutaster
                                             Almutaster pauciflorus
                                                   [Aster hydrophilus]
                                                   [Aster pauciflorus]
                                     Alomia
                                             Alomia alata
                                             Alomia echioides
                                             Alomia stenolepis
                                     Alvordia
                                             Alvordia brandegeei
                                             Alvordia congesta
                                             Alvordia fruticosa
                                             Alvordia glomerata
                                               Alvordia glomerata var. glomerata
                                               Alvordia glomerata var. insularis
                                     Amauria
                                             Amauria brandegeeana
                                             Amauria carterae
                                             Amauria rotundifolia
                                     Amauriopsis
                                             Amauriopsis dissecta
                                                   [Amauria dissecta]
                                                   [Bahia dissecta]
                                     Amberboa
                                             Amberboa moschata
                                                   [Centaurea moschata]
                                     Amblyolepis
                                             Amblyolepis setigera
                                                   [Helenium setigerum]
                                     Amblyopappus
                                             Amblyopappus pusillus
                                     Amboroa
                                     Ambrosia
                                             Ambrosia acanthicarpa
                                                   [Franseria acanthicarpa]
                                                   [Gaertneria acanthicarpa]
                                             Ambrosia acuminata
                                             Ambrosia ambrosioides
                                                   [Franseria ambrosioides]
                                             Ambrosia arborescens
                                             Ambrosia artemisiaefolia
                                             Ambrosia artemisiifolia
                                               Ambrosia artemisiifolia var. artemisiifolia
                                               Ambrosia artemisiifolia var. elatior
                                                     [Ambrosia elatior]
                                               Ambrosia artemisiifolia var. paniculata
                                             Ambrosia artemisioides
                                             Ambrosia bidentata
                                             Ambrosia bipinnatifida
                                             Ambrosia bryantii
                                             Ambrosia camphorata
                                             Ambrosia canescens
                                             Ambrosia carduacea
                                             Ambrosia chamissonis
                                                   [Ambrosia chamissonis var. bipinnatisecta]
                                                   [Franseria chamissonis ssp. bipinnatisecta]
                                                   [Franseria chamissonis var. bipinnatisecta]
                                                   [Franseria chamissonis]
                                             Ambrosia cheiranthifolia
                                             Ambrosia chenopodiifolia
                                                   [Franseria chenopodiifolia]
                                             Ambrosia confertiflora
                                                   [Franseria confertiflora]
                                                   [Franseria strigulosa]
                                                   [Gaertneria tenuifolia]
                                             Ambrosia cordifolia
                                                   [Franseria cordifolia]
                                                           Ambrosia cordifolia x deltoidea
                                             Ambrosia deltoidea
                                                   [Franseria deltoidea]
                                             Ambrosia divaricata
                                             Ambrosia dumosa
                                                   [Franseria dumosa]
                                             Ambrosia eriocentra
                                                   [Franseria eriocentra]
                                             Ambrosia flexuosa
                                             Ambrosia glandulosa
                                             Ambrosia grayi
                                                   [Gaertnera tomentosa]
                                                   [Gaertneria grayi]
                                             Ambrosia hispida
                                             Ambrosia ilicifolia
                                                   [Franseria ilicifolia]
                                             Ambrosia linearis
                                             Ambrosia magdalenae
                                             Ambrosia media
                                             Ambrosia monogyra
                                                   [Hymenoclea monogyra]
                                             Ambrosia monophylla
                                             Ambrosia paniculata
                                             Ambrosia peruviana
                                             Ambrosia psilostachya
                                                   [Ambrosia californica]
                                                   [Ambrosia coronopifolia]
                                                   [Ambrosia cumanensis]
                                                   [Ambrosia psilostachya var. californica]
                                                   [Ambrosia psilostachya var. coronopifolia]
                                                   [Ambrosia psilostachya var. lindheimeriana]
                                                   [Ambrosia rugelii]
                                                   [Franseria psilostachya]
                                             Ambrosia pumila
                                                   [Franseria pumila]
                                             Ambrosia salsola
                                                   [Ambrosia salsola var. fasciculata]
                                                   [Ambrosia salsola var. pentalepis]
                                                   [Ambrosia salsola var. salsola]
                                                   [Hymenoclea fasciculata]
                                                   [Hymenoclea pentalepis]
                                                   [Hymenoclea salsola var. fasciculata]
                                                   [Hymenoclea salsola var. patula]
                                                   [Hymenoclea salsola var. pentalepis]
                                                   [Hymenoclea salsola var. salsola]
                                                   [Hymenoclea salsola]
                                             Ambrosia sandersonii
                                             Ambrosia striata
                                             Ambrosia tenuifolia
                                             Ambrosia tomentosa
                                                   [Franseria discolor]
                                                   [Franseria tomentosa]
                                                   [Gaertneria discolor]
                                                   [Gaertneria tomentosa]
                                             Ambrosia trifida
                                                   [Ambrosia aptera]
                                               Ambrosia trifida var. texana
                                                     [Ambrosia trifida var. aptera]
                                               Ambrosia trifida var. trifida
                                                     [Ambrosia trifida var. integrifolia]
                                             Ambrosia velutina
                                             Ambrosia x helenae
                                             Ambrosia x intergradiens
                                     Ameghinoa
                                             Ameghinoa patagonica
                                     Amellus
                                           [Stilpnophyllum]
                                     Ammodia
                                             Ammodia oregona
                                     Ammopursus
                                             Ammopursus ohlingerae
                                     Ampelaster
                                             Ampelaster carolinianus
                                     Amphiachyris
                                             Amphiachyris amoena
                                             Amphiachyris amoenum
                                             Amphiachyris dracunculoides
                                                   [Brachyris dracunculoides]
                                                   [Gutierrezia dracunculoides]
                                                   [Xanthocephalum dracunculoides]
                                     Amphipappus
                                             Amphipappus fremontii
                                                   [Amphiachyris fremontii]
                                               Amphipappus fremontii ssp. fremontii
                                               Amphipappus fremontii var. fremontii
                                               Amphipappus fremontii var. spinosus
                                                     [Amphiachyris fremontii var. spinosa]
                                                     [Amphipappus fremontii ssp. spinosus]
                                     Anacyclus
                                             Anacyclus clavatus
                                             Anacyclus tomentosus
                                     Anacylus
                                             Anacylus clavatus
                                             Anacylus tomentosus
                                     Anaphalis
                                             Anaphalis lactea
                                             Anaphalis margaritacea
                                                   [Anaphalis lanata]
                                                   [Anaphalis margaritacea var. angustior]
                                                   [Anaphalis margaritacea var. intercedens]
                                                   [Anaphalis margaritacea var. occidentalis]
                                                   [Anaphalis margaritacea var. revoluta]
                                                   [Anaphalis margaritacea var. subalpina]
                                                   [Anaphalis occidentalis]
                                                   [Antennaria margaritacea]
                                                   [Gnaphalium margaritaceum]
                                                   [Nacrea lanata]
                                             Anaphalis racemifera
                                             Anaphalis sierrae
                                             Anaphalis subalpina
                                     Anastraphia
                                             Anastraphia attenuata
                                                   [Anastraphia lomensis]
                                                   [Anastraphia mensuraensis]
                                             Anastraphia buchii
                                                   [Anastraphia rosei]
                                             Anastraphia calcicola
                                             Anastraphia cowellii
                                             Anastraphia crassifolia
                                             Anastraphia cubensis
                                                   [Anastraphia victorinii]
                                             Anastraphia ekmanii
                                             Anastraphia elliptica
                                             Anastraphia enneantha
                                             Anastraphia gomezii
                                             Anastraphia ilicifolia
                                             Anastraphia intertexta
                                             Anastraphia maisiana
                                             Anastraphia mantuensis
                                             Anastraphia microcephala
                                             Anastraphia montana
                                             Anastraphia northropiana
                                               Anastraphia northropiana var. northropiana
                                             Anastraphia obovata
                                             Anastraphia obtusifolia
                                                   [Anastraphia baracoensis]
                                             Anastraphia oligantha
                                             Anastraphia parvifolia
                                             Anastraphia paucifloscula
                                                   [Anastraphia bahamensis]
                                                   [Anastraphia cuneifolia]
                                             Anastraphia picardae
                                             Anastraphia recurva
                                             Anastraphia shaferi
                                                   [Anastraphia nipensis]
                                                   [Anastraphia oblongifolia]
                                             Anastraphia tortuensis
                                             Anastraphia wilsonii
                                     Ancistrocarphus
                                             Ancistrocarphus filagineus
                                             Ancistrocarphus keilii
                                     Andromachia
                                     Angelphytum
                                             Angelphytum arnottii
                                             Angelphytum hatschbachii
                                             Angelphytum indutum
                                     Anisocarpus
                                             Anisocarpus bolanderi
                                             Anisocarpus madioides
                                             Anisocarpus scabridus
                                     Anisocoma
                                             Anisocoma acaulis
                                     Antennaria
                                             Antennaria acuminata
                                             Antennaria alaskana
                                             Antennaria alborosea
                                             Antennaria alpina
                                                   [Antennaria alpina var. canescens]
                                                   [Antennaria alpina var. compacta]
                                                   [Antennaria alpina var. glabrata]
                                                   [Antennaria alpina var. intermedia]
                                                   [Antennaria alpina var. stolonifera]
                                                   [Antennaria alpina var. ungavensis]
                                                   [Antennaria arenicola]
                                                   [Antennaria atriceps]
                                                   [Antennaria bayardii]
                                                   [Antennaria boecheriana]
                                                   [Antennaria borealis]
                                                   [Antennaria brunnescens]
                                                   [Antennaria cana]
                                                   [Antennaria canescens ssp. porsildii]
                                                   [Antennaria canescens var. pseudoporsildii]
                                                   [Antennaria canescens]
                                                   [Antennaria columnaris]
                                                   [Antennaria compacta]
                                                   [Antennaria confusa]
                                                   [Antennaria crymophila]
                                                   [Antennaria foggii]
                                                   [Antennaria friesiana ssp. compacta]
                                                   [Antennaria glabrata]
                                                   [Antennaria groenlandica]
                                                   [Antennaria hansii]
                                                   [Antennaria intermedia]
                                                   [Antennaria labradorica]
                                                   [Antennaria longii]
                                                   [Antennaria media ssp. compacta]
                                                   [Antennaria pallida]
                                                   [Antennaria pedunculata]
                                                   [Antennaria porsildii]
                                                   [Antennaria sornborgeri]
                                                   [Antennaria stolonifera]
                                                   [Antennaria subcanescens]
                                                   [Antennaria ungavensis]
                                                   [Antennaria vexillifera]
                                                   [Antennaria wiegandii]
                                                   [Gnaphalium alpinum]
                                               Antennaria alpina var. megacephala
                                               Antennaria alpina var. scabra
                                             Antennaria ambigens
                                             Antennaria ampla
                                             Antennaria anaphaloides
                                             Antennaria angustata
                                             Antennaria appendiculata
                                             Antennaria arcuata
                                             Antennaria argentea
                                               Antennaria argentea ssp. aberrans
                                             Antennaria arkansana
                                             Antennaria arnoglossa
                                               Antennaria arnoglossa var. ambigens
                                             Antennaria aromatica
                                             Antennaria bifrons
                                             Antennaria brainerdii
                                             Antennaria burwellensis
                                             Antennaria callilepis
                                             Antennaria calophylla
                                             Antennaria canadensis
                                                   [Antennaria neodioica ssp. canadensis]
                                             Antennaria carpatica
                                               Antennaria carpatica var. humilis
                                               Antennaria carpatica var. lanata
                                               Antennaria carpatica var. pulcherrima
                                             Antennaria caucasica
                                             Antennaria chilensis
                                             Antennaria chlorantha
                                                   [Antennaria neodioica var. chlorantha]
                                             Antennaria concolor
                                             Antennaria congesta
                                             Antennaria corymbosa
                                                   [Antennaria acuta]
                                                   [Antennaria dioica var. corymbosa]
                                                   [Antennaria hygrophila]
                                                   [Antennaria nardina]
                                             Antennaria densifolia
                                             Antennaria dimorpha
                                                   [Antennaria dimorpha var. integra]
                                                   [Antennaria dimorpha var. latisquama]
                                                   [Antennaria dimorpha var. macrocephala]
                                                   [Antennaria latisquama]
                                                   [Antennaria macrocephala]
                                                   [Gnaphalium dimorphum]
                                               Antennaria dimorpha var. flagellaris
                                             Antennaria dioica
                                               Antennaria dioica var. hyperborea
                                               Antennaria dioica var. rosea
                                             Antennaria ellyae
                                             Antennaria eucosma
                                             Antennaria exilis
                                             Antennaria eximia
                                             Antennaria fallax
                                               Antennaria fallax var. calophylla
                                             Antennaria farwellii
                                             Antennaria fernaldiana
                                             Antennaria flagellaris
                                             Antennaria formosa
                                             Antennaria friesiana
                                               Antennaria friesiana ssp. alaskana
                                               Antennaria friesiana ssp. friesiana
                                                     [Antennaria alpina var. friesiana]
                                                     [Antennaria ekmaniana]
                                               Antennaria friesiana ssp. neoalaskana
                                               Antennaria friesiana var. megacephala
                                             Antennaria geyeri
                                             Antennaria greenei
                                             Antennaria hendersonii
                                             Antennaria howellii
                                                   [Antennaria neodioica ssp. howellii]
                                               Antennaria howellii ssp. canadensis
                                               Antennaria howellii ssp. howellii
                                               Antennaria howellii ssp. neodioica
                                                     [Antennaria grandis]
                                                     [Antennaria neglecta var. attenuata]
                                                     [Antennaria neglecta var. neodioica]
                                                     [Antennaria neodioica var. attenuata]
                                                     [Antennaria neodioica var. chlorophylla]
                                                     [Antennaria neodioica var. grandis]
                                                     [Antennaria neodioica var. interjecta]
                                                     [Antennaria neodioica var. rupicola]
                                                     [Antennaria neodioica]
                                                     [Antennaria obovata]
                                                     [Antennaria rhodantha]
                                                     [Antennaria rupicola]
                                                     [Antennaria russellii]
                                               Antennaria howellii ssp. petaloidea
                                             Antennaria hudsonica
                                             Antennaria hyperborea
                                             Antennaria imbricata
                                             Antennaria insularis
                                             Antennaria lanata
                                             Antennaria lanulosa
                                             Antennaria luzuloides
                                               Antennaria luzuloides ssp. aberrans
                                               Antennaria luzuloides ssp. luzuloides
                                               Antennaria luzuloides var. argentea
                                               Antennaria luzuloides var. microcephala
                                               Antennaria luzuloides var. oblanceolata
                                             Antennaria magellanica
                                             Antennaria marginata
                                                   [Antennaria dioica var. marginata]
                                                   [Antennaria fendleri]
                                                   [Antennaria peramoena]
                                             Antennaria media
                                                   [Antennaria alpina var. media]
                                                   [Antennaria austromontana]
                                                   [Antennaria candida]
                                                   [Antennaria densa]
                                                   [Antennaria gormanii]
                                                   [Antennaria modesta]
                                                   [Antennaria mucronata]
                                               Antennaria media ssp. ciliata
                                               Antennaria media ssp. pulchella
                                             Antennaria megacephala
                                             Antennaria mesochora
                                             Antennaria microcephala
                                             Antennaria microphylla
                                                   [Antennaria aprica var. minuscula]
                                                   [Antennaria aprica]
                                                   [Antennaria aureola]
                                                   [Antennaria bracteosa]
                                                   [Antennaria holmii]
                                                   [Antennaria minuscula]
                                                   [Antennaria nitida]
                                                   [Antennaria obtusata]
                                                   [Antennaria parvifolia var. bracteosa]
                                                   [Antennaria rhodanthus]
                                                   [Antennaria rosea var. nitida]
                                                   [Antennaria solstitialis]
                                             Antennaria monocephala
                                               Antennaria monocephala ssp. angustata
                                               Antennaria monocephala ssp. monocephala
                                               Antennaria monocephala ssp. philonipha
                                               Antennaria monocephala var. exilis
                                             Antennaria munda
                                             Antennaria neglecta
                                                   [Antennaria angustiarum]
                                                   [Antennaria athabascensis]
                                                   [Antennaria campestris var. athabascensis]
                                                   [Antennaria campestris]
                                                   [Antennaria chelonica]
                                                   [Antennaria erosa]
                                                   [Antennaria howellii var. athabascensis]
                                                   [Antennaria howellii var. campestris]
                                                   [Antennaria longifolia]
                                                   [Antennaria lunellii]
                                                   [Antennaria nebraskensis]
                                                   [Antennaria neglecta var. athabascensis]
                                                   [Antennaria neglecta var. campestris]
                                                   [Antennaria parvula]
                                                   [Antennaria rousseaui]
                                                   [Antennaria wilsonii]
                                               Antennaria neglecta ssp. howellii
                                               Antennaria neglecta var. argillicola
                                               Antennaria neglecta var. canadensis
                                               Antennaria neglecta var. howellii
                                               Antennaria neglecta var. petaloidea
                                               Antennaria neglecta var. randii
                                             Antennaria neoalaskana
                                             Antennaria nitens
                                             Antennaria oblanceolata
                                             Antennaria occidentalis
                                             Antennaria oxyphylla
                                             Antennaria parlinii
                                               Antennaria parlinii ssp. fallax
                                               Antennaria parlinii ssp. parlinii
                                               Antennaria parlinii var. arnoglossa
                                               Antennaria parlinii var. fallax
                                               Antennaria parlinii var. farwellii
                                             Antennaria parvifolia
                                                   [Antennaria latisquamea]
                                                   [Antennaria pumila]
                                                   [Antennaria recurva]
                                             Antennaria pedicellata
                                             Antennaria petaloidea
                                                   [Antennaria neodioica ssp. petaloidea]
                                                   [Antennaria neodioica var. petaloidea]
                                               Antennaria petaloidea var. scariosa
                                               Antennaria petaloidea var. subcorymbosa
                                             Antennaria philonipha
                                             Antennaria plantaginifolia
                                                   [Antennaria caroliniana]
                                                   [Antennaria decipiens]
                                                   [Antennaria denikeana]
                                                   [Antennaria nemoralis]
                                                   [Antennaria petiolata]
                                                   [Antennaria pinetorum]
                                                   [Antennaria plantaginifolia var. petiolata]
                                                   [Gnaphalium plantaginifolium]
                                               Antennaria plantaginifolia var. ambigens
                                               Antennaria plantaginifolia var. arnoglossa
                                               Antennaria plantaginifolia var. monocephala
                                               Antennaria plantaginifolia var. parlinii
                                             Antennaria polyphylla
                                             Antennaria pulchella
                                             Antennaria pulcherrima
                                               Antennaria pulcherrima ssp. anaphaloides
                                               Antennaria pulcherrima ssp. eucosma
                                               Antennaria pulcherrima ssp. pulcherrima
                                               Antennaria pulcherrima var. anaphaloides
                                               Antennaria pulcherrima var. angustisquama
                                               Antennaria pulcherrima var. sordida
                                             Antennaria pygmaea
                                             Antennaria pyramidata
                                             Antennaria racemosa
                                                   [Antennaria petasites]
                                                   [Antennaria piperi]
                                             Antennaria randii
                                                   [Antennaria neodioica var. randii]
                                             Antennaria rosea
                                               Antennaria rosea ssp. arida
                                                     [Antennaria arida ssp. viscidula]
                                                     [Antennaria arida]
                                                     [Antennaria scariosa]
                                               Antennaria rosea ssp. confinis
                                                     [Antennaria albicans]
                                                     [Antennaria angustifolia]
                                                     [Antennaria arida var. humilis]
                                                     [Antennaria breitungii]
                                                     [Antennaria brevistyla]
                                                     [Antennaria concinna]
                                                     [Antennaria confinis]
                                                     [Antennaria dioica var. kernensis]
                                                     [Antennaria elegans]
                                                     [Antennaria foliacea var. humilis]
                                                     [Antennaria incarnata]
                                                     [Antennaria laingii]
                                                     [Antennaria leontopodioides]
                                                     [Antennaria leuchippii]
                                                     [Antennaria rosea var. angustifolia]
                                                     [Antennaria sedoides]
                                                     [Antennaria sordida]
                                                     [Antennaria straminea]
                                                     [Antennaria subviscosa]
                                                     [Antennaria tomentella]
                                               Antennaria rosea ssp. divaricata
                                               Antennaria rosea ssp. pulvinata
                                                     [Antennaria affinis]
                                                     [Antennaria albescens]
                                                     [Antennaria fusca]
                                                     [Antennaria gaspensis]
                                                     [Antennaria howellii ssp. gaspensis]
                                                     [Antennaria isolepis]
                                                     [Antennaria maculata]
                                                     [Antennaria manicouagana]
                                                     [Antennaria media ssp. fusca]
                                                     [Antennaria neglecta var. gaspensis]
                                                     [Antennaria neodioica var. gaspensis]
                                                     [Antennaria peasei]
                                                     [Antennaria pulvinata ssp. albescens]
                                                     [Antennaria pulvinata]
                                                     [Antennaria sansonii]
                                               Antennaria rosea ssp. rosea
                                               Antennaria rosea var. imbricata
                                             Antennaria rosulata
                                                   [Antennaria bakeri]
                                                   [Antennaria sierrae-blancae]
                                             Antennaria scabra
                                             Antennaria soliceps
                                             Antennaria solitaria
                                             Antennaria spathulata
                                             Antennaria speciosa
                                             Antennaria stenolepis
                                             Antennaria stenophylla
                                                   [Antennaria alpina var. stenophylla]
                                                   [Antennaria leucophaea]
                                             Antennaria suffrutescens
                                             Antennaria tansleyi
                                             Antennaria tweedsmurii
                                             Antennaria umbellata
                                             Antennaria umbrinella
                                                   [Antennaria aizoides]
                                                   [Antennaria flavescens]
                                                   [Antennaria reflexa]
                                             Antennaria virginica
                                               Antennaria virginica var. argillicola
                                             Antennaria x erigeroides
                                             Antennaria x foliacea
                                             Antennaria x macounii
                                             Antennaria x oblancifolia
                                     Anteremanthus
                                             Anteremanthus hatschbachii
                                Anthemideae
                                     Artemisia
                                             Artemisia abrotanum
                                             Artemisia absinthium
                                                   [Artemisia absinthium var. insipida]
                                             Artemisia alaskana
                                             Artemisia aleutica
                                             Artemisia alpina
                                             Artemisia annua
                                             Artemisia araxina
                                             Artemisia arbuscula
                                               Artemisia arbuscula ssp. arbuscula
                                               Artemisia arbuscula ssp. longicaulis
                                               Artemisia arbuscula ssp. longiloba
                                               Artemisia arbuscula ssp. thermopola
                                               Artemisia arbuscula var. longiloba
                                             Artemisia arctica
                                               Artemisia arctica ssp. arctica
                                               Artemisia arctica ssp. beringensis
                                               Artemisia arctica ssp. comata
                                               Artemisia arctica ssp. saxicola
                                               Artemisia arctica var. beringensis
                                             Artemisia argentea
                                             Artemisia argophylla
                                             Artemisia armeniaca
                                             Artemisia aromatica
                                             Artemisia aucheri
                                             Artemisia australis
                                             Artemisia biennis
                                               Artemisia biennis var. biennis
                                               Artemisia biennis var. diffusa
                                             Artemisia bigelovii
                                             Artemisia borealis
                                               Artemisia borealis ssp. borealis
                                               Artemisia borealis ssp. purshii
                                               Artemisia borealis ssp. richardsoniana
                                               Artemisia borealis var. latisecta
                                               Artemisia borealis var. purshii
                                             Artemisia brittonii
                                             Artemisia californica
                                               Artemisia californica var. insularis
                                             Artemisia campestris
                                               Artemisia campestris ssp. borealis
                                               Artemisia campestris ssp. campestris
                                               Artemisia campestris ssp. canadensis
                                               Artemisia campestris ssp. caudata
                                                     [Artemisia campestris var. caudata]
                                                     [Artemisia caudata var. calvens]
                                                     [Artemisia caudata]
                                                     [Artemisia forwoodii]
                                                     [Oligosporus campestris ssp. caudatus]
                                                     [Oligosporus caudatus]
                                               Artemisia campestris ssp. glutinosa
                                               Artemisia campestris ssp. pacifica
                                                     [Artemisia campestris var. scouleriana]
                                               Artemisia campestris var. canadensis
                                               Artemisia campestris var. petiolata
                                               Artemisia campestris var. purshii
                                             Artemisia cana
                                               Artemisia cana ssp. bolanderi
                                                     [Artemisia bolanderi]
                                                     [Artemisia tridentata ssp. bolanderi]
                                                     [Artemisia tridentata var. bolanderi]
                                                     [Seriphidium canum ssp. bolanderi]
                                               Artemisia cana ssp. cana
                                               Artemisia cana ssp. viscidula
                                                     [Artemisia argilosa]
                                                     [Artemisia cana var. viscidula]
                                                     [Artemisia viscidula]
                                                     [Seriphidium canum ssp. viscidulum]
                                               Artemisia cana var. cana
                                             Artemisia canadensis
                                             Artemisia canariensis
                                             Artemisia carruthii
                                                   [Artemisia carruthii var. wrightii]
                                                   [Artemisia kansana]
                                             Artemisia caucasica
                                             Artemisia chamaemelifolia
                                             Artemisia cina
                                             Artemisia coloradensis
                                             Artemisia comata
                                             Artemisia cuneata
                                             Artemisia discolor
                                             Artemisia domingensis
                                             Artemisia douglasiana
                                                   [Artemisia vulgaris ssp. heterophylla]
                                                   [Artemisia vulgaris var. douglasiana]
                                             Artemisia dracunculina
                                             Artemisia dracunculus
                                                   [Artemisia dracunculoides var. dracunculina]
                                                   [Artemisia dracunculoides]
                                                   [Artemisia dracunculus ssp. glauca]
                                                   [Artemisia dracunculus var. glauca]
                                                   [Artemisia glauca dracunculus]
                                                   [Artemisia glauca var. dracunculina]
                                                   [Artemisia glauca]
                                                   [Oligosporus dracunculus ssp. dracunculinus]
                                                   [Oligosporus dracunculus ssp. glaucus]
                                                   [Oligosporus dracunculus]
                                               Artemisia dracunculus ssp. dracunculus
                                               Artemisia dracunculus var. dracunculus
                                             Artemisia elatior
                                             Artemisia elegantissima
                                             Artemisia filifolia
                                                   [Oligosporus filifolius]
                                             Artemisia flava
                                             Artemisia franserioides
                                             Artemisia frigida
                                             Artemisia furcata
                                               Artemisia furcata var. furcata
                                               Artemisia furcata var. heterophylla
                                             Artemisia globularia
                                               Artemisia globularia ssp. globularia
                                               Artemisia globularia ssp. lutea
                                               Artemisia globularia var. lutea
                                             Artemisia glomerata
                                               Artemisia glomerata var. glomerata
                                               Artemisia glomerata var. subglabrata
                                             Artemisia gmelinii
                                             Artemisia gnaphaloides
                                             Artemisia gorgonum
                                             Artemisia gormanii
                                             Artemisia gracillima
                                             Artemisia hedinii
                                             Artemisia herba-alba
                                             Artemisia heterophylla
                                             Artemisia hillebrandii
                                               Artemisia hillebrandii var. kauaiensis
                                             Artemisia hyperborea
                                             Artemisia incana
                                             Artemisia judaica
                                             Artemisia kauaiensis
                                             Artemisia krushiana
                                             Artemisia laciniata
                                               Artemisia laciniata ssp. laciniata
                                               Artemisia laciniata ssp. parryi
                                                     [Artemisia parryi]
                                             Artemisia laciniatiformis
                                             Artemisia lactiflora
                                             Artemisia laxa
                                             Artemisia leucotricha
                                             Artemisia lindleyana
                                                   [Artemisia prescottiana]
                                             Artemisia lingyeouruennii
                                             Artemisia longifolia
                                             Artemisia longiloba
                                             Artemisia ludoviciana
                                               Artemisia ludoviciana ssp. albula
                                                     [Artemisia albula]
                                                     [Artemisia ludoviciana var. albula]
                                               Artemisia ludoviciana ssp. candicans
                                                     [Artemisia candicans]
                                                     [Artemisia ludoviciana var. latiloba]
                                               Artemisia ludoviciana ssp. estesii
                                               Artemisia ludoviciana ssp. incompta
                                                     [Artemisia incompta]
                                                     [Artemisia ludoviciana var. incompta]
                                               Artemisia ludoviciana ssp. ludoviciana
                                                     [Artemisia diversifolia]
                                                     [Artemisia gnaphalodes]
                                                     [Artemisia herriotii]
                                                     [Artemisia ludoviciana ssp. typica]
                                                     [Artemisia ludoviciana var. americana]
                                                     [Artemisia ludoviciana var. brittonii]
                                                     [Artemisia ludoviciana var. gnaphalodes]
                                                     [Artemisia ludoviciana var. latifolia]
                                                     [Artemisia ludoviciana var. pabularis]
                                                     [Artemisia pabularis]
                                                     [Artemisia purshiana]
                                                     [Artemisia vulgaris ssp. ludoviciana]
                                                     [Artemisia vulgaris var. ludoviciana]
                                               Artemisia ludoviciana ssp. mexicana
                                                     [Artemisia ludoviciana var. mexicana]
                                                     [Artemisia mexicana]
                                                     [Artemisia neomexicana]
                                                     [Artemisia vulgaris var. mexicana]
                                               Artemisia ludoviciana ssp. redolens
                                               Artemisia ludoviciana ssp. sulcata
                                                     [Artemisia sulcata]
                                               Artemisia ludoviciana var. ludoviciana
                                               Artemisia ludoviciana var. redolens
                                             Artemisia macrobotrys
                                             Artemisia magellanica
                                             Artemisia maritima
                                             Artemisia marschalliana
                                             Artemisia mauiensis
                                               Artemisia mauiensis var. diffusa
                                             Artemisia mendozana
                                             Artemisia michauxiana
                                                   [Artemisia vulgaris ssp. michauxiana]
                                             Artemisia microcephala
                                             Artemisia minima
                                             Artemisia monosperma
                                             Artemisia natronensis
                                             Artemisia nesiotica
                                             Artemisia norvegica
                                               Artemisia norvegica ssp. norvegica
                                               Artemisia norvegica ssp. saxatilis
                                               Artemisia norvegica var. comata
                                               Artemisia norvegica var. piceetorum
                                               Artemisia norvegica var. saxatilis
                                             Artemisia nova
                                                   [Artemisia arbuscula ssp. nova]
                                                   [Artemisia arbuscula var. nova]
                                                   [Artemisia nova var. duchesnicola]
                                                   [Artemisia tridentata ssp. nova]
                                                   [Seriphidium novum]
                                               Artemisia nova var. nova
                                             Artemisia packardiae
                                             Artemisia palmeri
                                             Artemisia palustris
                                             Artemisia papposa
                                             Artemisia parishii
                                             Artemisia pattersoni
                                             Artemisia pattersonii
                                             Artemisia pedatifida
                                             Artemisia persica
                                             Artemisia petrophila
                                             Artemisia pontica
                                             Artemisia porteri
                                             Artemisia potentilloides
                                             Artemisia pringlei
                                             Artemisia procera
                                             Artemisia pudica
                                             Artemisia pycnocephala
                                             Artemisia pygmaea
                                                   [Seriphidium pygmaeum]
                                             Artemisia redolens
                                             Artemisia revoluta
                                             Artemisia richardsoniana
                                             Artemisia rigida
                                             Artemisia rothrockii
                                             Artemisia rupestris
                                               Artemisia rupestris ssp. rupestris
                                             Artemisia rutifolia
                                             Artemisia sacrorum
                                             Artemisia santolinaefolia
                                             Artemisia santolinifolia
                                             Artemisia saxicola
                                             Artemisia schrenkiana
                                             Artemisia scoparia
                                             Artemisia scopulorum
                                             Artemisia selengensis
                                             Artemisia senjavinensis
                                             Artemisia serrata
                                             Artemisia sibirica
                                             Artemisia silvicola
                                             Artemisia spiciformis
                                               Artemisia spiciformis var. longiloba
                                             Artemisia spithamaea
                                             Artemisia spithamea
                                             Artemisia splendens
                                             Artemisia stelleriana
                                             Artemisia stipularis
                                             Artemisia suksdorfii
                                             Artemisia tacomensis
                                             Artemisia thuscula
                                             Artemisia tilesii
                                               Artemisia tilesii ssp. elatior
                                               Artemisia tilesii ssp. gormanii
                                               Artemisia tilesii ssp. tilesii
                                               Artemisia tilesii ssp. unalaschcensis
                                                     [Artemisia hookeriana]
                                                     [Artemisia tilesii var. unalaschcensis]
                                               Artemisia tilesii var. aleutica
                                               Artemisia tilesii var. elatior
                                             Artemisia tridentata
                                               Artemisia tridentata ssp. arbuscula
                                               Artemisia tridentata ssp. parishii
                                                     [Artemisia tridentata var. parishii]
                                                     [Seriphidium tridentatum ssp. parishii]
                                               Artemisia tridentata ssp. rothrockii
                                               Artemisia tridentata ssp. spiciformis
                                               Artemisia tridentata ssp. tridentata
                                                     [Artemisia angusta]
                                                     [Artemisia tridentata var. angustifolia]
                                                     [Seriphidium tridentatum]
                                               Artemisia tridentata ssp. trifida
                                               Artemisia tridentata ssp. typica
                                               Artemisia tridentata ssp. vaseyana
                                                     [Artemisia tridentata var. pauciflora]
                                                     [Artemisia tridentata var. vaseyana]
                                                     [Artemisia vaseyana]
                                                     [Seriphidium tridentatum ssp. vaseyanum]
                                                     [Seriphidium vaseyanum]
                                               Artemisia tridentata ssp. wyomingensis
                                                     [Artemisia tridentata var. wyomingensis]
                                                     [Seriphidium tridentatum ssp. wyomingense]
                                               Artemisia tridentata ssp. xericensis
                                               Artemisia tridentata var. rothrockii
                                               Artemisia tridentata var. spiciformis
                                               Artemisia tridentata var. tridentata
                                               Artemisia tridentata var. trifida
                                             Artemisia trifida
                                               Artemisia trifida var. rigida
                                             Artemisia trifurcata
                                             Artemisia tripartita
                                               Artemisia tripartita ssp. rupicola
                                               Artemisia tripartita ssp. tripartita
                                               Artemisia tripartita var. rupicola
                                             Artemisia tyrellii
                                             Artemisia umbelliformis
                                             Artemisia unalaskensis
                                               Artemisia unalaskensis var. aleutica
                                             Artemisia underwoodii
                                             Artemisia verlotorum
                                             Artemisia vulgaris
                                               Artemisia vulgaris ssp. Wrighti
                                               Artemisia vulgaris ssp. gnaphalodes
                                               Artemisia vulgaris ssp. longifolia
                                               Artemisia vulgaris var. coarctata
                                               Artemisia vulgaris var. glabra
                                               Artemisia vulgaris var. kamtschatica
                                               Artemisia vulgaris var. latiloba
                                               Artemisia vulgaris var. selengensis
                                               Artemisia vulgaris var. vulgaris
                                             Artemisia wrightii
                                     Anthemis
                                             Anthemis altissima
                                             Anthemis arvensis
                                               Anthemis arvensis var. agrestis
                                             Anthemis austriaca
                                             Anthemis cotula
                                                   [Maruta cotula]
                                             Anthemis discoidea
                                             Anthemis fuscata
                                             Anthemis maris-mortui
                                             Anthemis mixta
                                             Anthemis pseudocotula
                                             Anthemis secundiramea
                                     Antheropeas
                                             Antheropeas australe
                                     Antillanthus
                                             Antillanthus cubensis
                                             Antillanthus discolor
                                                   [Antillanthus almironcillo]
                                             Antillanthus ekmanii
                                             Antillanthus eriocarphus
                                             Antillanthus leucolepis
                                             Antillanthus pachylepis
                                             Antillanthus pachypodus
                                             Antillanthus subsquarrosus
                                             Antillanthus trichotomus
                                     Antillia
                                             Antillia brachychaeta
                                     Anvillea
                                             Anvillea garcinii
                                     Apargia
                                             Apargia autumnalis
                                             Apargia hispida
                                     Apargidium
                                             Apargidium boreale
                                     Aphanactis
                                     Aphanostephus
                                             Aphanostephus kidderi
                                             Aphanostephus perennis
                                             Aphanostephus pilosus
                                             Aphanostephus ramosissimus
                                               Aphanostephus ramosissimus var. humilis
                                                     [Aphanostephus arizonicus]
                                                     [Aphanostephus humilis]
                                                     [Aphanostephus potosinus]
                                                     [Leucopsidium humile]
                                               Aphanostephus ramosissimus var. ramosissimus
                                             Aphanostephus riddellii
                                             Aphanostephus skirrhobasis
                                               Aphanostephus skirrhobasis var. kidderi
                                               Aphanostephus skirrhobasis var. skirrhobasis
                                               Aphanostephus skirrhobasis var. thalassius
                                             Aphanostephus skirrobasis
                                     Aphantochaeta
                                             Aphantochaeta exilis
                                     Aphyllocladus
                                             Aphyllocladus spartioides
                                     Aplopappus
                                     Archibaccharis
                                             Archibaccharis androgyna
                                             Archibaccharis asperifolia
                                             Archibaccharis flexilis
                                             Archibaccharis glandulosa
                                             Archibaccharis hieraciifolia
                                             Archibaccharis hieracioides
                                             Archibaccharis hirtella
                                             Archibaccharis intermedia
                                             Archibaccharis mucronata
                                             Archibaccharis peninsularis
                                             Archibaccharis schiedeana
                                             Archibaccharis serratifolia
                                             Archibaccharis sescenticeps
                                             Archibaccharis simplex
                                             Archibaccharis subsessilis
                                             Archibaccharis torquis
                                     Arctanthemum
                                             Arctanthemum arcticum
                                                   [Chrysanthemum arcticum ssp. arcticum]
                                               Arctanthemum arcticum ssp. arcticum
                                             Arctanthemum integrifolium
                                     Arctanthemumarcticum
                                             Arctanthemumarcticum ssp.
                                               Arctanthemumarcticum ssp. ssp. e
                                     Arctium
                                             Arctium lappa
                                                   [Lappa major]
                                             Arctium minus
                                                   [Lappa minor]
                                               Arctium minus ssp. nemorosum
                                             Arctium nemorosum
                                             Arctium tomentosum
                                             Arctium vulgare
                                             Arctium x mixtum
                                             Arctium x nothum
                                     Arctotheca
                                             Arctotheca calendula
                                             Arctotheca prostrata
                                     Arctotis
                                             Arctotis angustifolia
                                             Arctotis breviscapa
                                             Arctotis fastuosa
                                             Arctotis stoechadifolia
                                                   [Arctotis grandis]
                                                   [Arctotis stoechadifolia var. grandis]
                                             Arctotis venusta
                                     Argyranthemum
                                             Argyranthemum anethifolium
                                             Argyranthemum foeniculaceum
                                             Argyranthemum foeniculum
                                             Argyranthemum frutescens
                                                   [Chrysanthemum frutescens]
                                             Argyranthemum gracilis
                                     Argyrautia
                                     Argyroxiphium
                                             Argyroxiphium caliginis
                                               Argyroxiphium caliginis var. kai
                                             Argyroxiphium forbesii
                                             Argyroxiphium grayanum
                                             Argyroxiphium kauense
                                             Argyroxiphium macrocephalum
                                             Argyroxiphium sandwicense
                                               Argyroxiphium sandwicense ssp. macrocephalum
                                               Argyroxiphium sandwicense ssp. sandwicense
                                               Argyroxiphium sandwicense var. kauense
                                             Argyroxiphium virescens
                                             Argyroxiphium x kai
                                     Arida
                                             Arida arizonica
                                                   [Machaeranthera ammophila]
                                                   [Machaeranthera arida]
                                                   [Machaeranthera arizonica]
                                                   [Machaeranthera coulteri var. arida]
                                             Arida blepharophylla
                                             Arida carnosa
                                                   [Aster intricatus]
                                                   [Bigelovia intricata]
                                                   [Leucosyris carnosa var. intricata]
                                                   [Leucosyris carnosa]
                                                   [Linosyris carnosa]
                                                   [Machaeranthera carnosa var. carnosa]
                                                   [Machaeranthera carnosa var. intricata]
                                                   [Machaeranthera carnosa]
                                             Arida coulteri
                                                   [Machaeranthera coulteri]
                                                   [Psilactis coulteri]
                                             Arida crispa
                                             Arida mattturneri
                                             Arida parviflora
                                             Arida riparia
                                     Aristeguietia
                                     Arnaldoa
                                     Arnica
                                             Arnica acaulis
                                             Arnica alata
                                             Arnica alpina
                                               Arnica alpina ssp. angustifolia
                                               Arnica alpina ssp. attenuata
                                               Arnica alpina ssp. lonchophylla
                                               Arnica alpina ssp. sornborgeri
                                               Arnica alpina ssp. tomentosa
                                               Arnica alpina var. angustifolia
                                               Arnica alpina var. attenuata
                                               Arnica alpina var. linearis
                                               Arnica alpina var. lonchophylla
                                               Arnica alpina var. plantaginea
                                               Arnica alpina var. tomentosa
                                               Arnica alpina var. ungavensis
                                               Arnica alpina var. vestita
                                             Arnica amplexicaulis
                                               Arnica amplexicaulis ssp. genuina
                                               Arnica amplexicaulis ssp. prima
                                               Arnica amplexicaulis var. piperi
                                               Arnica amplexicaulis var. prima
                                             Arnica amplexifolia
                                             Arnica angustifolia
                                               Arnica angustifolia ssp. angustifolia
                                               Arnica angustifolia ssp. attenuata
                                               Arnica angustifolia ssp. lonchophylla
                                               Arnica angustifolia ssp. tomentosa
                                               Arnica angustifolia var. tomentosa
                                             Arnica arnoglossa
                                             Arnica austinae
                                             Arnica betonicifolia
                                             Arnica bruceae
                                             Arnica caespitosa
                                             Arnica cana
                                             Arnica cascadensis
                                             Arnica caudata
                                             Arnica celsa
                                             Arnica cernua
                                             Arnica chamissonis
                                                   [Arnica foliosa var. bernardina]
                                               Arnica chamissonis ssp. chamissonis
                                               Arnica chamissonis ssp. foliosa
                                                     [Arnica bernardina]
                                                     [Arnica chamissonis ssp. incana]
                                                     [Arnica foliosa var. incana]
                                               Arnica chamissonis ssp. genuina
                                               Arnica chamissonis var. andina
                                                     [Arnica chamissonis var. foliosa]
                                                     [Arnica chamissonis var. jepsoniana]
                                                     [Arnica foliosa]
                                               Arnica chamissonis var. incana
                                               Arnica chamissonis var. longinodosa
                                             Arnica chandleri
                                             Arnica chionopappa
                                             Arnica ciliaris
                                             Arnica coloradensis
                                             Arnica cordata
                                             Arnica cordifolia
                                                   [Arnica cordifolia ssp. genuina]
                                                   [Arnica cordifolia var. humilis]
                                                   [Arnica cordifolia var. pumila]
                                                   [Arnica cordifolia var. whitneyi]
                                                   [Arnica hardinae]
                                                   [Arnica humilis]
                                                   [Arnica paniculata]
                                                   [Arnica whitneyi]
                                               Arnica cordifolia var. cordifolia
                                               Arnica cordifolia var. macrophylla
                                             Arnica cusickii
                                             Arnica dealbata
                                             Arnica discoidea
                                               Arnica discoidea var. alata
                                               Arnica discoidea var. eradiata
                                             Arnica diversifolia
                                             Arnica eastwoodiae
                                             Arnica frigida
                                               Arnica frigida ssp. frigida
                                               Arnica frigida ssp. griscomii
                                               Arnica frigida var. glandulosa
                                             Arnica fulgens
                                                   [Arnica pedunculata]
                                             Arnica gaspensis
                                             Arnica gracilis
                                                   [Arnica arcana]
                                             Arnica granulifera
                                             Arnica grayi
                                             Arnica griscomii
                                               Arnica griscomii ssp. frigida
                                               Arnica griscomii ssp. griscomii
                                             Arnica jonesii
                                             Arnica lanceolata
                                               Arnica lanceolata ssp. lanceolata
                                               Arnica lanceolata ssp. prima
                                             Arnica lanulosa
                                             Arnica latifolia
                                                   [Arnica latifolia var. angustifolia]
                                               Arnica latifolia var. gracilis
                                               Arnica latifolia var. latifolia
                                               Arnica latifolia var. teucriifolia
                                             Arnica lessingii
                                                   [Arnica lessingii ssp. norbergii]
                                             Arnica lonchophylla
                                               Arnica lonchophylla ssp. arnoglossa
                                               Arnica lonchophylla ssp. chionopappa
                                               Arnica lonchophylla ssp. lonchophylla
                                               Arnica lonchophylla var. arnoglossa
                                             Arnica longifolia
                                                   [Arnica longifolia ssp. genuina]
                                                   [Arnica longifolia ssp. myriadenia]
                                               Arnica longifolia subsp. longifolia
                                             Arnica louiseana
                                               Arnica louiseana ssp. frigida
                                               Arnica louiseana ssp. griscomii
                                               Arnica louiseana var. brevifolia
                                               Arnica louiseana var. frigida
                                               Arnica louiseana var. genuina
                                               Arnica louiseana var. illiamnae
                                               Arnica louiseana var. mendenhallii
                                               Arnica louiseana var. pilosa
                                             Arnica macilenta
                                             Arnica maguirei
                                             Arnica menziesii
                                             Arnica mollis
                                                   [Arnica mollis var. silvatica]
                                                   [Arnica rivularis]
                                               Arnica mollis var. aspera
                                               Arnica mollis var. mollis
                                               Arnica mollis var. petiolaris
                                             Arnica montana
                                             Arnica nevadensis
                                             Arnica ocreata
                                             Arnica ovata
                                                   [Arnica latifolia var. viscidula]
                                             Arnica parryi
                                                   [Arnica eradiata]
                                               Arnica parryi ssp. genuina
                                               Arnica parryi ssp. parryi
                                               Arnica parryi ssp. sonnei
                                               Arnica parryi var. crinita
                                               Arnica parryi var. sonnei
                                             Arnica parviflora
                                               Arnica parviflora ssp. alata
                                             Arnica parvifolia
                                             Arnica plantaginea
                                             Arnica platyphylla
                                             Arnica pumila
                                             Arnica rhizomata
                                             Arnica rydbergii
                                             Arnica sanhedrensis
                                             Arnica silvatica
                                             Arnica snyderi
                                             Arnica sonnei
                                             Arnica sornborgeri
                                             Arnica sororia
                                                   [Arnica fulgens var. sororia]
                                             Arnica spathulata
                                               Arnica spathulata ssp. eastwoodiae
                                               Arnica spathulata var. eastwoodiae
                                             Arnica subplumosa
                                               Arnica subplumosa var. sylvatica
                                             Arnica terrae-novae
                                             Arnica tomentella
                                             Arnica tomentosa
                                             Arnica unalaschcensis
                                             Arnica venosa
                                             Arnica ventorum
                                             Arnica viscosa
                                             Arnica x diversifolia
                                     Arnicastrum
                                             Arnicastrum glandulosum
                                     Arnoglossum
                                             Arnoglossum album
                                             Arnoglossum atriplicifolium
                                                   [Cacalia atriplicifolia]
                                                   [Cacalia rotundifolia]
                                                   [Mesadenia atriplicifolia]
                                             Arnoglossum diversifolium
                                             Arnoglossum floridanum
                                             Arnoglossum muehlenbergii
                                             Arnoglossum ovatum
                                                   [Cacalia elliottii]
                                                   [Cacalia lanceolata var. elliottii]
                                                   [Cacalia lanceolata var. virescens]
                                                   [Cacalia lanceolata]
                                                   [Cacalia ovata]
                                                   [Mesadenia elliottii]
                                                   [Mesadenia lanceolata var. virescens]
                                                   [Mesadenia lanceolata]
                                                   [Mesadenia maxima]
                                             Arnoglossum plantagineum
                                                   [Cacalia paniculata]
                                                   [Cacalia plantaginea]
                                                   [Cacalia pteranthes]
                                                   [Cacalia tuberosa]
                                                   [Mesadenia tuberosa]
                                             Arnoglossum reniforme
                                             Arnoglossum sulcatum
                                     Arnoseris
                                             Arnoseris minima
                                     Asanthus
                                             Asanthus squamulosus
                                                   [Brickellia squamulosa]
                                     Ascidiogyne
                                     Askellia
                                             Askellia elegans
                                             Askellia nana
                                               Askellia nana ssp. ramosa
                                     Aspilia
                                             Aspilia apensis
                                             Aspilia attenuata
                                             Aspilia clausseniana
                                             Aspilia cupulata
                                             Aspilia cylindrocephala
                                             Aspilia floribunda
                                             Aspilia foliosa
                                             Aspilia hassleriana
                                             Aspilia heringeriana
                                             Aspilia latissima
                                             Aspilia mexicana
                                             Aspilia montevidensis
                                             Aspilia rosei
                                             Aspilia silphioides
                                             Aspilia stenophylla
                                     Asplundianthus
                                     Aster
                                             Aster acadiensis
                                             Aster acuminatus
                                               Aster acuminatus var. magdalenensis
                                             Aster adnatus
                                             Aster agrostifolius
                                             Aster alpigenus
                                               Aster alpigenus ssp. andersonii
                                               Aster alpigenus ssp. haydenii
                                               Aster alpigenus var. andersonii
                                               Aster alpigenus var. haydenii
                                             Aster alpinus
                                               Aster alpinus ssp. vierhapperi
                                               Aster alpinus var. alpinus
                                               Aster alpinus var. serpentimontanus
                                               Aster alpinus var. vierhapperi
                                             Aster altaicus
                                             Aster amelloides
                                             Aster amellus
                                               Aster amellus ssp. ibericus
                                             Aster amethystinus
                                             Aster andersonii
                                             Aster anomalus
                                             Aster anticostensis
                                             Aster apricus
                                                   [Aster foliaceus var. apricus]
                                             Aster asperifolius
                                             Aster asperugineus
                                             Aster avitus
                                             Aster azureus
                                               Aster azureus var. poaceus
                                             Aster batesii
                                             Aster behringensis
                                             Aster bernardinus
                                             Aster bietii
                                             Aster blakei
                                             Aster bloomeri
                                             Aster borealis
                                             Aster bracei
                                             Aster brachypholis
                                             Aster brachytrichus
                                             Aster brevilingulatus
                                             Aster breweri
                                             Aster brickellioides
                                               Aster brickellioides var. glabratus
                                             Aster bullatus
                                             Aster calderi
                                             Aster campestris
                                               Aster campestris var. bloomeri
                                             Aster camptosorus
                                             Aster carnerosanus
                                             Aster carnosus
                                             Aster carolinianus
                                             Aster caucasicus
                                             Aster chapmanii
                                             Aster chasei
                                             Aster chinensis
                                             Aster chlorolepis
                                                   [Aster divaricatus var. chlorolepis]
                                             Aster ciliolatus
                                               Aster ciliolatus var. comatus
                                               Aster ciliolatus var. maccallae
                                               Aster ciliolatus var. wilsonii
                                             Aster claviger
                                             Aster cognatus
                                             Aster coloradensis
                                             Aster coloradoensis
                                             Aster columbianus
                                             Aster commixtus
                                             Aster concinnus
                                                   [Aster laevis var. concinnus]
                                             Aster concolor
                                               Aster concolor var. simulatus
                                             Aster conduplicatus
                                             Aster conspicuus
                                             Aster continuus
                                             Aster copelandii
                                             Aster coridifolius
                                             Aster corrigiatus
                                             Aster corymbiformis
                                             Aster covillei
                                             Aster crenifolius
                                             Aster curtisii
                                             Aster curtus
                                             Aster curvescens
                                             Aster cusickii
                                                   [Aster foliaceus var. cusickii]
                                               Aster cusickii var. lyallii
                                             Aster defoliatus
                                             Aster depauperatus
                                               Aster depauperatus var. parviceps
                                             Aster deserticola
                                             Aster diffusus
                                               Aster diffusus var. thyrsoides
                                             Aster diplostephioides
                                             Aster diversifolius
                                             Aster douglasii
                                             Aster dracunculoides
                                             Aster drummondii
                                                   [Aster sagittifolius var. drummondii]
                                               Aster drummondii ssp. parviceps
                                               Aster drummondii ssp. texanus
                                               Aster drummondii var. parviceps
                                               Aster drummondii var. texanus
                                             Aster dumosus
                                               Aster dumosus var. coridifolius
                                               Aster dumosus var. dodgei
                                               Aster dumosus var. gracilentus
                                               Aster dumosus var. gracilipes
                                               Aster dumosus var. pergracilis
                                               Aster dumosus var. strictior
                                               Aster dumosus var. subulifolius
                                             Aster elatus
                                             Aster elliottii
                                             Aster elodes
                                             Aster engelmannii
                                                   [Aster elegans var. engelmannii]
                                               Aster engelmannii var. glaucescens
                                               Aster engelmannii var. ledophyllus
                                               Aster engelmannii var. paucicapitatus
                                             Aster eryngiifolius
                                             Aster eulae
                                             Aster farreri
                                             Aster faxonii
                                             Aster finkii
                                             Aster firmus
                                             Aster flaccidus
                                               Aster flaccidus var. flaccidus
                                             Aster fontinalis
                                             Aster forwoodii
                                             Aster fragilis
                                               Aster fragilis var. brachypholis
                                               Aster fragilis var. subdumosus
                                             Aster franklinianus
                                             Aster frutescens
                                             Aster fruticosus
                                             Aster fulcratus
                                             Aster furcatus
                                             Aster garibaldii
                                             Aster gaspensis
                                             Aster gentryi
                                             Aster georgianus
                                                   [Aster patens var. georgianus]
                                             Aster glabriuscula
                                               Aster glabriuscula var. parryi
                                             Aster glaucescens
                                             Aster glehnii
                                             Aster glomeratus
                                             Aster gormanii
                                             Aster gracilescens
                                             Aster gracilipes
                                             Aster gracilis
                                                   [Aster patens var. gracilis]
                                             Aster grandiflorus
                                             Aster gravesii
                                             Aster grayi
                                             Aster greatae
                                             Aster greatai
                                             Aster griseolus
                                             Aster hallii
                                                   [Aster chilensis ssp. hallii]
                                             Aster haydenii
                                             Aster hemisphericus
                                                   [Aster paludosus ssp. hemisphericus]
                                             Aster hendersonii
                                             Aster herveyi
                                             Aster himalaicus
                                             Aster hirsuticaulis
                                             Aster hirtellus
                                             Aster horizontalis
                                             Aster humilis
                                             Aster hybridus
                                               Aster hybridus var. luteus
                                             Aster ibericus
                                             Aster infirmus
                                             Aster invenustus
                                                   [Aster chilensis var. invenustus]
                                             Aster jessicae
                                             Aster johannensis
                                               Aster johannensis var. villicaulis
                                             Aster jonesiae
                                             Aster junciformis
                                             Aster juniperinus
                                             Aster kentuckiensis
                                             Aster kingii
                                               Aster kingii var. barnebyana
                                             Aster lanceolatus
                                             Aster lateriflorus
                                               Aster lateriflorus var. angustifolius
                                               Aster lateriflorus var. flagellaris
                                               Aster lateriflorus var. hirsuticaulis
                                               Aster lateriflorus var. horizontalis
                                               Aster lateriflorus var. indutus
                                               Aster lateriflorus var. pendulus
                                               Aster lateriflorus var. spatelliformis
                                               Aster lateriflorus var. tenuipes
                                               Aster lateriflorus var. thyrsoides
                                             Aster latissimifolius
                                             Aster laurentianus
                                               Aster laurentianus var. laurentianus
                                               Aster laurentianus var. magdalenensis
                                             Aster laxifolius
                                               Aster laxifolius var. borealis
                                             Aster ledophyllus
                                               Aster ledophyllus var. covillei
                                             Aster lentus
                                                   [Aster chilensis var. lentus]
                                             Aster lepidopodus
                                             Aster leucopsis
                                             Aster lima
                                             Aster linariifolius
                                               Aster linariifolius var. victorinii
                                             Aster lindleyanus
                                             Aster linearifolius
                                             Aster linguiformis
                                             Aster linosyris
                                             Aster lonchophyllus
                                             Aster longulus
                                             Aster loriformis
                                             Aster lowrieanus
                                             Aster lucidulus
                                             Aster lutescens
                                             Aster maackii
                                             Aster maccallae
                                             Aster major
                                             Aster meritus
                                             Aster microphyllus
                                                   [Aster sericeus var. microphyllus]
                                             Aster mirabilis
                                             Aster missouriensis
                                               Aster missouriensis var. thyrsoides
                                             Aster modestus
                                             Aster mohrii
                                             Aster mollis
                                             Aster molliusculus
                                             Aster mongolicus
                                             Aster moranensis
                                             Aster nebraskensis
                                                   [Aster praealtus var. nebraskensis]
                                             Aster nemoralis
                                             Aster novi-belgii
                                               Aster novi-belgii ssp. johannensis
                                               Aster novi-belgii ssp. tardiflorus
                                               Aster novi-belgii var. crenifolius
                                               Aster novi-belgii var. elodes
                                               Aster novi-belgii var. johannensis
                                               Aster novi-belgii var. tardiflorus
                                               Aster novi-belgii var. villicaulis
                                             Aster nudatus
                                             Aster ontarionis
                                               Aster ontarionis var. glabratus
                                             Aster oolentangiensis
                                               Aster oolentangiensis var. laevicaulis
                                               Aster oolentangiensis var. poaceus
                                             Aster oregonensis
                                               Aster oregonensis ssp. californicus
                                             Aster oregonum
                                             Aster oreophilus
                                             Aster paludicola
                                             Aster pantotrichus
                                               Aster pantotrichus var. thyrsoides
                                             Aster parryi
                                             Aster parviceps
                                                   [Aster ericoides var. parviceps]
                                             Aster patentissimus
                                                   [Aster patens var. patentissimus]
                                             Aster paucicapitatus
                                             Aster pedionomus
                                             Aster peirsonii
                                             Aster pendulus
                                             Aster phyllolepis
                                             Aster pilosus
                                               Aster pilosus ssp. parviceps
                                               Aster pilosus var. demotus
                                               Aster pilosus var. platyphyllus
                                               Aster pilosus var. priceae
                                               Aster pilosus var. pringlei
                                               Aster pilosus var. pusillus
                                             Aster plumosus
                                             Aster poaceus
                                             Aster pratensis
                                             Aster prenanthoides
                                             Aster priceae
                                             Aster pringlei
                                                   [Aster ericoides var. pringlei]
                                             Aster proteus
                                             Aster ptarmicoides
                                               Aster ptarmicoides var. georgianus
                                               Aster ptarmicoides var. lutescens
                                             Aster pubentior
                                             Aster pulchellus
                                             Aster punctatus
                                             Aster puniceus
                                               Aster puniceus ssp. elliottii
                                               Aster puniceus ssp. firmus
                                               Aster puniceus var. calderi
                                               Aster puniceus var. calvus
                                               Aster puniceus var. compactus
                                               Aster puniceus var. demissus
                                               Aster puniceus var. elliottii
                                               Aster puniceus var. firmus
                                               Aster puniceus var. lucidulus
                                               Aster puniceus var. oligocephalus
                                               Aster puniceus var. perlongus
                                               Aster puniceus var. scabricaulis
                                             Aster purpuratus
                                                   [Aster laevis var. purpuratus]
                                             Aster pygmaeus
                                             Aster pyrenaeus
                                             Aster racemosus
                                             Aster radula
                                               Aster radula var. strictus
                                             Aster reticulatus
                                             Aster retroflexus
                                             Aster richardsonii
                                             Aster robynsianus
                                             Aster rolandii
                                             Aster rotundifolius
                                             Aster sandwicensis
                                                   [Aster divaricatus var. sandwicensis]
                                             Aster saundersii
                                             Aster saxatilis
                                             Aster saxicastellii
                                             Aster scaber
                                             Aster scabricaulis
                                             Aster schaffneri
                                             Aster schistosus
                                             Aster schreberi
                                             Aster scopulorum
                                             Aster sedifolius
                                               Aster sedifolius ssp. dracunculoides
                                             Aster sericocarpoides
                                             Aster serpentimontanus
                                             Aster shortii
                                             Aster sibiricus
                                               Aster sibiricus ssp. pygmaeus
                                               Aster sibiricus ssp. richardsonii
                                               Aster sibiricus var. giganteus
                                               Aster sibiricus var. meritus
                                               Aster sibiricus var. pygmaeus
                                             Aster simmondsii
                                             Aster simulatus
                                             Aster siskiyouensis
                                             Aster smallii
                                             Aster solidagineus
                                             Aster sonomensis
                                                   [Aster chilensis var. sonomensis]
                                             Aster spatelliformis
                                             Aster spectabilis
                                               Aster spectabilis var. cinerascens
                                               Aster spectabilis var. suffultus
                                             Aster spinulosus
                                             Aster squamatus
                                             Aster standleyi
                                             Aster stenomeres
                                             Aster subasper
                                                   [Aster praealtus var. subasper]
                                             Aster subgeminatus
                                                   [Aster foliaceus var. subgeminatus]
                                             Aster subintegerrimus
                                             Aster subsalignus
                                             Aster subsessilis
                                             Aster subspicatus
                                               Aster subspicatus var. apricus
                                               Aster subspicatus var. grayi
                                             Aster subulatus
                                               Aster subulatus var. australis
                                               Aster subulatus var. elongatus
                                               Aster subulatus var. parviflorus
                                               Aster subulatus var. sandwicensis
                                             Aster sulznerae
                                             Aster surculosus
                                             Aster sylvestris
                                             Aster tardiflorus
                                               Aster tardiflorus var. vestitus
                                             Aster tataricus
                                             Aster tenerrimus
                                             Aster tenuicaulis
                                             Aster tenuifolius
                                               Aster tenuifolius var. aphyllus
                                             Aster texanus
                                               Aster texanus var. parviceps
                                             Aster thermalis
                                             Aster thomsonii
                                             Aster tibeticus
                                             Aster tongolensis
                                             Aster torreyi
                                             Aster tradescantii
                                               Aster tradescantii var. saxatilis
                                               Aster tradescantii var. thyrsoides
                                             Aster triangularis
                                             Aster trilineatus
                                             Aster truellius
                                             Aster turbinellus
                                             Aster uliginosus
                                             Aster umbellatus
                                               Aster umbellatus var. brevisquamis
                                               Aster umbellatus var. latifolius
                                               Aster umbellatus var. pubens
                                             Aster unalaschkensis
                                               Aster unalaschkensis var. major
                                             Aster underwoodii
                                             Aster undulatus
                                               Aster undulatus var. asperulus
                                               Aster undulatus var. diversifolius
                                               Aster undulatus var. loriformis
                                               Aster undulatus var. triangularis
                                             Aster urophyllus
                                                   [Aster sagittifolius var. urophyllus]
                                             Aster vahlii
                                             Aster vernalis
                                             Aster verutifolius
                                             Aster vialis
                                             Aster villosus
                                                   [Aster ericoides var. villosus]
                                             Aster vimineus
                                               Aster vimineus var. saxatilis
                                               Aster vimineus var. subdumosus
                                             Aster walteri
                                             Aster watsonii
                                             Aster wilsonii
                                             Aster woldenii
                                             Aster woodhousei
                                             Aster x amethystinus
                                             Aster x batesii
                                             Aster x columbianus
                                             Aster x gravesii
                                             Aster x herveyi
                                             Aster x longulus
                                             Aster x salignus
                                             Aster x schistosus
                                             Aster x tardiflorus
                                             Aster x versicolor
                                             Aster x woldenii
                                             Aster xylorhiza
                                             Aster yosemitanus
                                                   [Aster ascendens var. yosemitanus]
                                                   [Aster occidentalis var. yosemitanus]
                                             Aster yukonensis
                                             Aster yunnanensis
                                Astereae
                                     Dieteria
                                             Dieteria asteroides
                                                   [Aster amplifolius]
                                                   [Aster boltoniae]
                                                   [Aster canescens var. latifolius]
                                                   [Aster canescens var. tephrodes]
                                                   [Aster tephrodes]
                                                   [Machaeranthera amplifolia]
                                                   [Machaeranthera asteroides var. asteroides x glandulosa]
                                                   [Machaeranthera asteroides]
                                                   [Machaeranthera boltoniae]
                                                   [Machaeranthera canescens var. latifolia]
                                                   [Machaeranthera canescens var. tephrodes]
                                                   [Machaeranthera hansonii]
                                                   [Machaeranthera lagunensis]
                                                   [Machaeranthera pruinosa]
                                                   [Machaeranthera simplex]
                                                   [Machaeranthera tephrodes]
                                                   [Machaeranthera verna]
                                                   [Psilactis asteroides]
                                                   [Psilactis leptos]
                                               Dieteria asteroides var. asteroides
                                               Dieteria asteroides var. glandulosa
                                                     [Machaeranthera asteroides var. glandulosa]
                                               Dieteria asteroides var. lagunensis
                                                     [Machaeranthera asteroides var. lagunensis]
                                             Dieteria bigelovii
                                                   [Aster bigelovii]
                                                   [Dieteria canescens var. incana]
                                                   [Machaeranthera bigelovii]
                                                   [Machaeranthera canescens var. alpina]
                                                   [Machaeranthera canescens var. incana]
                                               Dieteria bigelovii var. bigelovii
                                                     [Aster aquifolius]
                                                     [Aster pattersonii]
                                                     [Aster rubrotinctus]
                                                     [Machaeranthera aquifolia]
                                                     [Machaeranthera aspera]
                                                     [Machaeranthera bigelovii var. bigelovii]
                                                     [Machaeranthera centaureoides]
                                                     [Machaeranthera pattersonii]
                                                     [Machaeranthera rubricaulis]
                                               Dieteria bigelovii var. commixta
                                                     [Machaeranthera bigelovii var. commixta]
                                                     [Machaeranthera canescens var. commixta]
                                                     [Machaeranthera commixta]
                                               Dieteria bigelovii var. mucronata
                                                     [Aster adenolepis]
                                                     [Machaeranthera bigelovii var. mucronata]
                                                     [Machaeranthera mucronata]
                                             Dieteria canescens
                                                   [Machaeranthera canescens]
                                               Dieteria canescens var. ambigua
                                                     [Machaeranthera canescens var. ambigua]
                                                     [Machaeranthera oxylepis]
                                                     [Machaeranthera scoparia]
                                               Dieteria canescens var. aristata
                                                     [Aster canescens var. aristatus]
                                                     [Aster cichoriaceus]
                                                     [Machaeranthera canescens var. aristata]
                                                     [Machaeranthera canescens var. vacans]
                                                     [Machaeranthera cichoriacea]
                                                     [Machaeranthera pulverulenta var. vacans]
                                                     [Machaeranthera rigida]
                                               Dieteria canescens var. canescens
                                                     [Aster attenuatus]
                                                     [Aster inornatus]
                                                     [Aster leucanthemifolius]
                                                     [Aster shastensis var. eradiatus]
                                                     [Aster shastensis]
                                                     [Dieteria incana]
                                                     [Dieteria sessiliflora]
                                                     [Diplopappus incanus]
                                                     [Machaeranthera attenuata]
                                                     [Machaeranthera canescens ssp. canescens]
                                                     [Machaeranthera canescens var. canescens]
                                                     [Machaeranthera eradiata]
                                                     [Machaeranthera hiemalis]
                                                     [Machaeranthera incana]
                                                     [Machaeranthera inops var. atrata]
                                                     [Machaeranthera inops]
                                                     [Machaeranthera inornata]
                                                     [Machaeranthera leucanthemifolia]
                                                     [Machaeranthera magna]
                                                     [Machaeranthera sessiliflora]
                                               Dieteria canescens var. glabra
                                                     [Aster canescens var. viridis]
                                                     [Aster linearis]
                                                     [Machaeranthera canescens ssp. glabra]
                                                     [Machaeranthera canescens var. glabra]
                                                     [Machaeranthera canescens var. viridis]
                                                     [Machaeranthera fremontii]
                                               Dieteria canescens var. leucanthemifolia
                                                     [Machaeranthera canescens var. leucanthemifolia]
                                               Dieteria canescens var. nebraskana
                                                     [Machaeranthera canescens var. nebraskana]
                                               Dieteria canescens var. sessiliflora
                                               Dieteria canescens var. shastensis
                                                     [Machaeranthera canescens var. shastensis]
                                                     [Machaeranthera shastensis var. eradiata]
                                                     [Machaeranthera shastensis]
                                               Dieteria canescens var. ziegleri
                                                     [Machaeranthera canescens ssp. ziegleri]
                                                     [Machaeranthera canescens var. ziegleri]
                                             Herrickia glauca
                                                   [Aster glaucodes var. formosus]
                                                   [Aster glaucodes]
                                                   [Aster glaucus]
                                                   [Eucephalus formosus]
                                                   [Eucephalus glaucus]
                                                   [Eurybia glauca]
                                               Herrickia glauca var. glauca
                                               Herrickia glauca var. pulchra
                                     Petradoria
                                             Petradoria graminea
                                             Petradoria pumila
                                               Petradoria pumila ssp. pumila
                                                     [Solidago petradoria]
                                               Petradoria pumila var. graminea
                                                     [Petradoria pumila ssp. graminea]
                                               Petradoria pumila var. pumila
                                     Asteriscus
                                             Asteriscus aquaticus
                                             Asteriscus graveolens
                                             Asteriscus pygmaeus
                                     Astranthium
                                             Astranthium beamanii
                                             Astranthium ciliatum
                                             Astranthium condimentum
                                             Astranthium integrifolium
                                               Astranthium integrifolium ssp. ciliatum
                                               Astranthium integrifolium ssp. integrifolium
                                               Astranthium integrifolium var. ciliatum
                                               Astranthium integrifolium var. robustum
                                               Astranthium integrifolium var. triflorum
                                             Astranthium mexicanum
                                               Astranthium mexicanum var. chihuahuense
                                             Astranthium orthopodium
                                             Astranthium orthopodum
                                             Astranthium purpurascens
                                             Astranthium robustum
                                             Astranthium splendens
                                             Astranthium xanthocomoides
                                             Astranthium xylopodum
                                     Athanasia
                                             Athanasia acerosa
                                             Athanasia parviflora
                                             Athanasia tomentosa
                                     Atractylis
                                             Atractylis prolifera
                                     Atrichoseris
                                             Atrichoseris platyphylla
                                                   [Malacothrix platyphylla]
                                     Austrobrickellia
                                     Austroeupatorium
                                             Austroeupatorium inulaefolium
                                             Austroeupatorium laetevirens
                                     Ayapana
                                             Ayapana triplinervis
                                     Ayapanopsis
                                     Aynia
                                     Aztecaster
                                             Aztecaster matudae
                                             Aztecaster pyramidatus
                                     Baccharidastrum
                                             Baccharidastrum argutum
                                     Baccharidiopsis
                                             Baccharidiopsis pohlii
                                     Baccharis
                                             Baccharis angusticeps
                                             Baccharis angustifolia
                                             Baccharis aphylla
                                             Baccharis aracatubensis
                                             Baccharis articulata
                                             Baccharis axillaris
                                             Baccharis bezanilleana
                                             Baccharis bigelovii
                                             Baccharis boliviensis
                                             Baccharis brachylaenoides
                                             Baccharis brachyphylla
                                             Baccharis calvescens
                                             Baccharis capitata
                                             Baccharis cognata
                                             Baccharis concava
                                             Baccharis conferta
                                             Baccharis coridifolia
                                             Baccharis crassicuneata
                                             Baccharis curitybensis
                                             Baccharis cylindrica
                                             Baccharis darwinii
                                             Baccharis dioica
                                             Baccharis douglasii
                                             Baccharis dracunculifolia
                                             Baccharis elaeagnoides
                                             Baccharis elaeoides
                                             Baccharis flabellata
                                             Baccharis gaudichaudiana
                                             Baccharis genistelloides
                                             Baccharis glandulifera
                                             Baccharis glomeruliflora
                                             Baccharis gracillima
                                             Baccharis haitiensis
                                             Baccharis halimifolia
                                                   [Baccharis halimifolia var. angustior]
                                             Baccharis havardii
                                             Baccharis helichrysoides
                                             Baccharis heterophylla
                                             Baccharis hieracifolia
                                             Baccharis illinita
                                             Baccharis juncea
                                             Baccharis latifolia
                                             Baccharis linearis
                                             Baccharis macrocephala
                                             Baccharis magellanica
                                             Baccharis malibuensis
                                             Baccharis megapotamica
                                             Baccharis mexicana
                                             Baccharis monoica
                                             Baccharis mucronata
                                             Baccharis multiflora
                                               Baccharis multiflora var. brevipappa
                                             Baccharis myriocephala
                                             Baccharis myrsinites
                                             Baccharis neglecta
                                             Baccharis nervosa
                                             Baccharis nipensis
                                             Baccharis nivalis
                                             Baccharis notosergila
                                             Baccharis nummularia
                                             Baccharis obovata
                                             Baccharis ochracea
                                             Baccharis oreophila
                                             Baccharis orientalis
                                             Baccharis oxyodonta
                                             Baccharis patagonica
                                             Baccharis pauciflosculosa
                                             Baccharis pedunculata
                                             Baccharis penningtonii
                                             Baccharis pentodonta
                                             Baccharis pentziaefolia
                                             Baccharis pilularis
                                                   [Baccharis pilularis var. consanguinea]
                                               Baccharis pilularis ssp. consanguinea
                                               Baccharis pilularis ssp. pilularis
                                             Baccharis pingraea
                                             Baccharis platypoda
                                             Baccharis plummerae
                                               Baccharis plummerae ssp. glabrata
                                               Baccharis plummerae ssp. plummerae
                                             Baccharis potosina
                                             Baccharis pteronioides
                                             Baccharis punctulata
                                             Baccharis racemosa
                                             Baccharis ramulosa
                                             Baccharis rhetinodes
                                             Baccharis rufescens
                                             Baccharis salicifolia
                                                   [Baccharis glutinosa]
                                                   [Baccharis viminea var. atwoodii]
                                                   [Baccharis viminea]
                                                   [Molina salicifolia]
                                             Baccharis salicina
                                                   [Baccharis emoryi]
                                             Baccharis sarothroides
                                             Baccharis scandens
                                             Baccharis schultzii
                                             Baccharis scoparia
                                             Baccharis scoparioides
                                             Baccharis selloi
                                             Baccharis semiserrata
                                             Baccharis sergiloides
                                             Baccharis serraefolia
                                             Baccharis serrulata
                                             Baccharis sessiliflora
                                             Baccharis shaferi
                                             Baccharis sordescens
                                             Baccharis spicata
                                             Baccharis squarrosa
                                             Baccharis stenocephala
                                             Baccharis stenophylla
                                             Baccharis stylosa
                                             Baccharis subdentata
                                             Baccharis sulcata
                                             Baccharis tarchonanthoides
                                             Baccharis texana
                                                   [Linosyris texana]
                                             Baccharis thesioides
                                             Baccharis trimera
                                             Baccharis trinervis
                                             Baccharis ulicina
                                             Baccharis uncinella
                                             Baccharis vaccinioides
                                             Baccharis vanessae
                                             Baccharis wrightii
                                               Baccharis wrightii var. pyrrhopappa
                                             Baccharis zamoranensis
                                     Badilloa
                                     Baeria
                                             Baeria bakeri
                                             Baeria burkei
                                             Baeria carnosa
                                             Baeria debilis
                                             Baeria fremontii
                                               Baeria fremontii var. conjugens
                                               Baeria fremontii var. heterochaeta
                                             Baeria leptalea
                                             Baeria macrantha
                                               Baeria macrantha var. bakeri
                                               Baeria macrantha var. pauciaristata
                                               Baeria macrantha var. thalassophila
                                             Baeria maritima
                                                   [Baeria minor ssp. maritima]
                                             Baeria microglossa
                                             Baeria mutica
                                               Baeria palmeri var. clementina
                                             Baeria platycarpha
                                             Baeria tenella
                                     Baeriopsis
                                             Baeriopsis guadalupensis
                                     Bahia
                                             Bahia absinthifolia
                                               Bahia absinthifolia var. absinthifolia
                                               Bahia absinthifolia var. dealbata
                                             Bahia ambrosioides
                                             Bahia anthemoides
                                             Bahia autumnalis
                                             Bahia bigelovii
                                             Bahia biternata
                                             Bahia chrysanthemoides
                                             Bahia glandulosa
                                             Bahia lanata
                                               Bahia lanata var. grandiflora
                                             Bahia nudicaulis
                                             Bahia palmeri
                                             Bahia parviflora
                                             Bahia pedata
                                             Bahia pringlei
                                             Bahia rubella
                                             Bahia schaffneri
                                             Bahia xylopoda
                                     Bahiopsis
                                             Bahiopsis chenopodina
                                             Bahiopsis laciniata
                                             Bahiopsis parishii
                                                   [Viguiera deltoidea var. parishii]
                                                   [Viguiera parishii]
                                             Bahiopsis reticulata
                                             Bahiopsis triangularis
                                     Baileya
                                             Baileya multiradiata
                                                   [Baileya multiradiata var. thurberi]
                                               Baileya multiradiata var. multiradiata
                                             Baileya nervosa
                                             Baileya pauciradiata
                                             Baileya pleniradiata
                                                   [Baileya multiradiata var. pleniradiata]
                                                   [Baileya perennis]
                                               Baileya pleniradiata var. perennis
                                             Baileya thurberi
                                     Bajacalia
                                             Bajacalia crassifolia
                                     Balduina
                                             Balduina angustifolia
                                             Balduina atropurpurea
                                             Balduina uniflora
                                     Balsamita
                                     Balsamorhiza
                                             Balsamorhiza bolanderi
                                             Balsamorhiza careyana
                                               Balsamorhiza careyana var. careyana
                                               Balsamorhiza careyana var. intermedia
                                             Balsamorhiza deltoidea
                                             Balsamorhiza glabrescens
                                             Balsamorhiza hispidula
                                                   [Balsamorhiza hookeri var. hispidula]
                                             Balsamorhiza hookeri
                                               Balsamorhiza hookeri var. hirsuta
                                                     [Balsamorhiza hirsuta]
                                               Balsamorhiza hookeri var. hookeri
                                               Balsamorhiza hookeri var. idahoensis
                                               Balsamorhiza hookeri var. lagocephala
                                                     [Balsamorhiza hirsuta var. lagocephala]
                                               Balsamorhiza hookeri var. lanata
                                               Balsamorhiza hookeri var. neglecta
                                                     [Balsamorhiza hirsuta var. neglecta]
                                               Balsamorhiza hookeri var. platylepis
                                             Balsamorhiza incana
                                             Balsamorhiza lanata
                                             Balsamorhiza macrolepis
                                               Balsamorhiza macrolepis var. macrolepis
                                               Balsamorhiza macrolepis var. platylepis
                                             Balsamorhiza macrophylla
                                               Balsamorhiza macrophylla var. idahoensis
                                             Balsamorhiza platylepis
                                             Balsamorhiza rosea
                                             Balsamorhiza sagittata
                                             Balsamorhiza sericea
                                             Balsamorhiza serrata
                                             Balsamorhiza x bonseri
                                             Balsamorhiza x terebinthacea
                                             Balsamorhiza x tomentosa
                                     Baltimora
                                             Baltimora geminata
                                             Baltimora recta
                                     Barkleyanthus
                                             Barkleyanthus salicifolius
                                                   [Cineraria salicifolia]
                                                   [Senecio salignus]
                                     Barnadesia
                                     Barroetea
                                             Barroetea laxiflora
                                             Barroetea sessilifolia
                                             Barroetea subuligera
                                               Barroetea subuligera var. latisquama
                                     Barrosoa
                                     Bartlettia
                                             Bartlettia scaposa
                                     Bartlettina
                                             Bartlettina oresbioides
                                             Bartlettina sordida
                                             Bartlettina tuerckheimii
                                     Bebbia
                                             Bebbia atriplicifolia
                                             Bebbia juncea
                                               Bebbia juncea var. aspera
                                               Bebbia juncea var. atriplicifolia
                                               Bebbia juncea var. juncea
                                     Bellis
                                             Bellis integrifolia
                                             Bellis mexicana
                                             Bellis perennis
                                             Bellis xanthocomoides
                                     Belloa
                                     Benitoa
                                             Benitoa occidentalis
                                     Berkheya
                                             Berkheya heterophylla
                                     Berlandiera
                                             Berlandiera dealbata
                                             Berlandiera lyrata
                                                   [Berlandiera incisa]
                                                   [Berlandiera lyrata var. macrophylla]
                                               Berlandiera lyrata var. monocephala
                                             Berlandiera monocephala
                                             Berlandiera pumila
                                               Berlandiera pumila var. pumila
                                               Berlandiera pumila var. scabrella
                                             Berlandiera subacaulis
                                             Berlandiera texana
                                                   [Berlandiera betonicifolia]
                                             Berlandiera tomentosa
                                               Berlandiera tomentosa var. dealbata
                                             Berlandiera x betonicifolia
                                             Berlandiera x humilis
                                                           Berlandiera x macrophylla
                                     Berthelotia
                                     Berylsimpsonia
                                             Berylsimpsonia crassinervis
                                             Berylsimpsonia vanillosma
                                     Bidens
                                             Bidens acrifolia
                                             Bidens aequisquama
                                             Bidens alba
                                               Bidens alba var. alba
                                               Bidens alba var. radiata
                                                     [Bidens pilosa var. radiata]
                                             Bidens amplectens
                                             Bidens amplissima
                                             Bidens angustissima
                                             Bidens anthemoides
                                             Bidens anthriscoides
                                               Bidens anthriscoides var. decomposita
                                             Bidens aristosa
                                                   [Bidens aristosa var. fritcheyi]
                                                   [Bidens aristosa var. mutica]
                                                   [Bidens aristosa var. retrorsa]
                                                   [Bidens involucrata]
                                                   [Bidens polylepis var. retrorsa]
                                             Bidens asplenioides
                                             Bidens asymmetrica
                                               Bidens asymmetrica var. subocculata
                                             Bidens aurea
                                                   [Bidens aurea var. wrightii]
                                                   [Bidens ferulaefolia]
                                                   [Bidens ferulifolia]
                                                   [Bidens heterophylla var. wrightii]
                                                   [Bidens heterophylla]
                                                   [Coreopsis aurea]
                                                   [Coreopsis ferulifolia]
                                             Bidens awaluana
                                             Bidens ballsii
                                             Bidens balsana
                                             Bidens beckii
                                             Bidens bidentoides
                                               Bidens bidentoides var. mariana
                                             Bidens bigelovii
                                               Bidens bigelovii var. angustiloba
                                               Bidens bigelovii var. bigelovii
                                             Bidens bipinnata
                                                   [Bidens bipinnata var. biternatoides]
                                               Bidens bipinnata var. cynapiifolia
                                             Bidens biternata
                                             Bidens campylotheca
                                               Bidens campylotheca ssp. campylotheca
                                               Bidens campylotheca ssp. pentamera
                                               Bidens campylotheca ssp. waihoiensis
                                               Bidens campylotheca var. pentamera
                                             Bidens caudatus
                                             Bidens cernua
                                                   [Bidens cernua var. cernua]
                                                   [Bidens cernua var. dentata]
                                                   [Bidens cernua var. elliptica]
                                                   [Bidens cernua var. integra]
                                                   [Bidens cernua var. minima]
                                                   [Bidens cernua var. oligodonta]
                                                   [Bidens cernua var. radiata]
                                                   [Bidens glaucescens]
                                               Bidens cernua var. elata
                                             Bidens cervicata
                                             Bidens chiapensis
                                             Bidens clarendonensis
                                             Bidens coartata
                                             Bidens comosa
                                                   [Bidens acuta]
                                                   [Bidens tripartita]
                                             Bidens conjuncta
                                             Bidens connata
                                               Bidens connata var. ambiversa
                                               Bidens connata var. anomala
                                               Bidens connata var. fallax
                                               Bidens connata var. gracilipes
                                               Bidens connata var. inundata
                                               Bidens connata var. petiolata
                                               Bidens connata var. pinnata
                                               Bidens connata var. submutica
                                             Bidens cornuta
                                             Bidens coronata
                                               Bidens coronata var. brachyodonta
                                               Bidens coronata var. tenuiloba
                                               Bidens coronata var. trichosperma
                                             Bidens cosmoides
                                               Bidens cosmoides var. refracta
                                             Bidens cronquistii
                                             Bidens ctenophylla
                                             Bidens cuneata
                                             Bidens cynapiifolia
                                               Bidens cynapiifolia var. portoricensis
                                               Bidens cynapiifolia var. tenuis
                                             Bidens degeneri
                                               Bidens degeneri var. apioides
                                             Bidens discoidea
                                             Bidens distans
                                             Bidens eatonii
                                               Bidens eatonii var. fallax
                                               Bidens eatonii var. illicita
                                               Bidens eatonii var. interstes
                                               Bidens eatonii var. kennebecensis
                                               Bidens eatonii var. major
                                               Bidens eatonii var. mutabilis
                                               Bidens eatonii var. simulans
                                             Bidens ekmanii
                                             Bidens elata
                                             Bidens fecunda
                                             Bidens ferax
                                             Bidens forbesii
                                               Bidens forbesii ssp. forbesii
                                               Bidens forbesii ssp. kahiliensis
                                             Bidens frondosa
                                                   [Bidens frondosa var. anomala]
                                                   [Bidens frondosa var. caudata]
                                                   [Bidens frondosa var. pallida]
                                                   [Bidens frondosa var. stenodonta]
                                               Bidens frondosa var. puberula
                                             Bidens fulvescens
                                             Bidens gardneri
                                             Bidens gentryi
                                             Bidens gracilis
                                             Bidens graciloides
                                             Bidens graveolens
                                             Bidens halawana
                                             Bidens hawaiensis
                                             Bidens heterodoxa
                                                   [Bidens heterodoxa var. agnostica]
                                                   [Bidens heterodoxa var. atheistica]
                                                   [Bidens heterodoxa var. monardifolia]
                                                   [Bidens heterodoxa var. orthodoxa]
                                                   [Bidens infirma]
                                                   [Bidens tripartita var. heterodoxa]
                                             Bidens heterosperma
                                             Bidens hillebrandiana
                                               Bidens hillebrandiana ssp. hillebrandiana
                                               Bidens hillebrandiana ssp. polycephala
                                             Bidens holwayi
                                             Bidens hyperborea
                                               Bidens hyperborea var. cathancensis
                                               Bidens hyperborea var. colpophila
                                               Bidens hyperborea var. hyperborea
                                               Bidens hyperborea var. laurentiana
                                               Bidens hyperborea var. svensonii
                                             Bidens inermis
                                             Bidens insolita
                                             Bidens kelloggii
                                             Bidens laevis
                                                   [Bidens elegans]
                                                   [Bidens nashii]
                                                   [Helianthus laevis]
                                             Bidens lemmonii
                                               Bidens lemmonii var. lemmonii
                                             Bidens leptocephala
                                             Bidens leucantha
                                             Bidens longistyla
                                             Bidens macrocarpa
                                               Bidens macrocarpa var. ovatifolia
                                             Bidens mariana
                                             Bidens mauiensis
                                               Bidens mauiensis var. ciliata
                                               Bidens mauiensis var. cuneatoides
                                               Bidens mauiensis var. forbesiana
                                               Bidens mauiensis var. lanaiensis
                                               Bidens mauiensis var. media
                                             Bidens menziesii
                                               Bidens menziesii ssp. filiformis
                                               Bidens menziesii ssp. menziesii
                                               Bidens menziesii var. filiformis
                                               Bidens menziesii var. lepida
                                               Bidens menziesii var. leptondontia
                                             Bidens mexicana
                                             Bidens micrantha
                                               Bidens micrantha ssp. ctenophylla
                                               Bidens micrantha ssp. kalealaha
                                               Bidens micrantha ssp. micrantha
                                               Bidens micrantha var. caduca
                                               Bidens micrantha var. kaalana
                                               Bidens micrantha var. laciniata
                                               Bidens micrantha var. rudimentifera
                                             Bidens mitis
                                               Bidens mitis var. leptophylla
                                             Bidens mollifolia
                                             Bidens molokaiensis
                                             Bidens muelleri
                                             Bidens napaliensis
                                             Bidens nematocera
                                             Bidens nudata
                                             Bidens obtusiloba
                                             Bidens ocellatus
                                             Bidens ostruthioides
                                             Bidens pentamera
                                             Bidens perversa
                                               Bidens perversa var. aquilonalis
                                             Bidens pilosa
                                                   [Bidens odorata var. calcicola]
                                                   [Bidens odorata]
                                                   [Bidens pilosa var. bimucronata]
                                                   [Bidens pilosa var. minor]
                                                   [Bidens pilosa var. pilosa]
                                               Bidens pilosa var. calcicola
                                             Bidens polylepis
                                             Bidens populifolia
                                             Bidens pringlei
                                             Bidens puberula
                                             Bidens pulchella
                                             Bidens refracta
                                             Bidens reptans
                                                   [Bidens brittonii]
                                               Bidens reptans var. reptans
                                               Bidens reptans var. urbanii
                                             Bidens riparia
                                               Bidens riparia var. refracta
                                             Bidens rosea
                                                   [Bidens odorata var. rosea]
                                               Bidens rosea var. aequisquama
                                             Bidens rostrata
                                             Bidens salicoides
                                             Bidens sambucifolia
                                             Bidens sandvicensis
                                               Bidens sandvicensis ssp. confusa
                                               Bidens sandvicensis ssp. sandvicensis
                                               Bidens sandvicensis var. antrorsa
                                               Bidens sandvicensis var. caduca
                                               Bidens sandvicensis var. imminuta
                                               Bidens sandvicensis var. leiocarpa
                                               Bidens sandvicensis var. setosa
                                             Bidens sarmentosa
                                             Bidens scandens
                                             Bidens seemannii
                                             Bidens segetum
                                             Bidens serrulata
                                             Bidens sharpii
                                             Bidens shrevei
                                             Bidens skottsbergii
                                               Bidens skottsbergii var. conglutinata
                                               Bidens skottsbergii var. pololuensis
                                             Bidens socorrensis
                                             Bidens squarrosa
                                             Bidens stokesii
                                             Bidens tenuisecta
                                             Bidens torta
                                             Bidens townsendii
                                             Bidens trichosperma
                                             Bidens triplinervia
                                             Bidens urbanii
                                             Bidens valida
                                             Bidens vulgata
                                               Bidens vulgata var. puberula
                                               Bidens vulgata var. schizantha
                                             Bidens waianensis
                                             Bidens waimeana
                                             Bidens wiebkei
                                             Bidens x dimidiata
                                             Bidens x magnidisca
                                             Bidens x micranthoides
                                             Bidens x multiceps
                                     Bigelovia
                                     Bigelowia
                                             Bigelowia albida
                                             Bigelowia brachylepis
                                             Bigelowia douglasii
                                               Bigelowia douglasii var. stenophylla
                                             Bigelowia graveolens
                                               Bigelowia graveolens var. hololeuca
                                             Bigelowia greenei
                                             Bigelowia howardii
                                               Bigelowia howardii var. attenuata
                                             Bigelowia juncea
                                             Bigelowia leiosperma
                                               Bigelowia leiosperma var. abbreviata
                                             Bigelowia nudata
                                               Bigelowia nudata ssp. australis
                                               Bigelowia nudata ssp. nudata
                                               Bigelowia nudata var. australis
                                               Bigelowia nudata var. nudata
                                             Bigelowia nuttallii
                                             Bigelowia paniculata
                                             Bigelowia parishii
                                             Bigelowia pyramidata
                                             Bigelowia rupestris
                                             Bigelowia spathulata
                                             Bigelowia vaseyi
                                             Bigelowia virgata
                                     Biolettia
                                             Biolettia riparia
                                     Bishopanthus
                                     Bishovia
                                     Blainvillea
                                             Blainvillea biaristata
                                     Blanchetia
                                             Blanchetia heterotricha
                                     Blennosperma
                                             Blennosperma bakeri
                                             Blennosperma californicum
                                             Blennosperma nanum
                                               Blennosperma nanum var. nanum
                                               Blennosperma nanum var. robustum
                                     Blepharipappus
                                             Blepharipappus bakeri
                                             Blepharipappus elegans
                                             Blepharipappus hieracioides
                                             Blepharipappus platyglossus
                                             Blepharipappus scaber
                                               Blepharipappus scaber ssp. laevis
                                               Blepharipappus scaber ssp. scaber
                                     Blepharizonia
                                             Blepharizonia laxa
                                             Blepharizonia plumosa
                                               Blepharizonia plumosa ssp. plumosa
                                               Blepharizonia plumosa ssp. viscida
                                     Blumea
                                             Blumea balsamifera
                                             Blumea lacera
                                             Blumea laciniata
                                             Blumea sessiliflora
                                             Blumea viscosa
                                                   [Conyza lyrata]
                                                   [Conyza viscosa]
                                                   [Eschenbachia lyrata]
                                     Boebera
                                     Boeberastrum
                                     Boeberoides
                                             Boeberoides grandiflora
                                     Bolanosa
                                             Bolanosa coulteri
                                     Bolophyta
                                     Boltonia
                                             Boltonia apalachicolensis
                                             Boltonia asteroides
                                               Boltonia asteroides var. asteroides
                                               Boltonia asteroides var. decurrens
                                               Boltonia asteroides var. glastifolia
                                               Boltonia asteroides var. latisquama
                                               Boltonia asteroides var. recognita
                                             Boltonia campestris
                                             Boltonia caroliniana
                                             Boltonia decurrens
                                             Boltonia diffusa
                                               Boltonia diffusa var. diffusa
                                               Boltonia diffusa var. interior
                                             Boltonia interior
                                             Boltonia latisquama
                                               Boltonia latisquama var. decurrens
                                               Boltonia latisquama var. microcephala
                                               Boltonia latisquama var. occidentalis
                                               Boltonia latisquama var. recognita
                                             Boltonia lautureana
                                             Boltonia ravenelii
                                             Boltonia recognita
                                     Bombycilaena
                                             Bombycilaena californica
                                               Bombycilaena californica var. subvestita
                                     Borrichia
                                             Borrichia arborescens
                                             Borrichia cubana
                                             Borrichia frutescens
                                             Borrichia x cubana
                                     Brachyactis
                                             Brachyactis angustus
                                             Brachyactis hybrida
                                     Brachychaeta
                                     Brachyclados
                                             Brachyclados caespitosus
                                     Brachycome
                                             Brachycome multifida
                                     Brachyris
                                             Brachyris californica
                                     Bracteantha
                                             Bracteantha bracteata
                                                   [Xeranthemum bracteatum]
                                     Bracyrhamphus
                                             Bracyrhamphus intybaceus
                                     Bradburia
                                             Bradburia hirtella
                                                   [Chrysopsis texana]
                                             Bradburia pilosa
                                                   [Chrysopsis pilosa]
                                     Brauneria
                                             Brauneria angustifolia
                                     Breea
                                     Brickellia
                                             Brickellia adenolepis
                                             Brickellia amplexicaulis
                                               Brickellia amplexicaulis var. amplexicaulis
                                               Brickellia amplexicaulis var. lanceolata
                                             Brickellia arguta
                                               Brickellia arguta var. arguta
                                               Brickellia arguta var. odontolepis
                                             Brickellia atractyloides
                                               Brickellia atractyloides var. arguta
                                               Brickellia atractyloides var. atractyloides
                                               Brickellia atractyloides var. odontolepis
                                             Brickellia baccharidea
                                             Brickellia betonicaefolia
                                             Brickellia betonicifolia
                                             Brickellia brachiata
                                             Brickellia brachyphylla
                                               Brickellia brachyphylla var. brachyphylla
                                               Brickellia brachyphylla var. hinckleyi
                                               Brickellia brachyphylla var. terlinguensis
                                             Brickellia californica
                                                   [Brickellia brandegei]
                                               Brickellia californica var. californica
                                                     [Bulbostylis californica]
                                               Brickellia californica var. jepsonii
                                             Brickellia cavanillesii
                                             Brickellia chenopodina
                                             Brickellia coahuilensis
                                             Brickellia conduplicata
                                             Brickellia cordifolia
                                             Brickellia corymbosa
                                             Brickellia coulteri
                                               Brickellia coulteri var. adenopoda
                                               Brickellia coulteri var. brachiata
                                               Brickellia coulteri var. coulteri
                                               Brickellia coulteri var. megalodonta
                                             Brickellia cuspidata
                                             Brickellia cylindracea
                                             Brickellia cymulifera
                                             Brickellia dentata
                                             Brickellia desertorum
                                                   [Brickellia californica var. desertorum]
                                                   [Coleosanthus desertorum]
                                             Brickellia diffusa
                                             Brickellia enigmatica
                                             Brickellia eupatorioides
                                               Brickellia eupatorioides var. chlorolepis
                                                     [Brickellia chlorolepis]
                                                     [Brickellia leptophylla var. mexicana]
                                                     [Brickellia rosemarinifolia var. chlorolepis]
                                                     [Brickellia rosmarinifolia ssp. chlorolepis]
                                                     [Brickellia shaffneri]
                                                     [Kuhnia chlorolepis]
                                                     [Kuhnia eupatorioides var. chlorolepis]
                                                     [Kuhnia gooddingii]
                                                     [Kuhnia leptophylla var. mexicana]
                                                     [Kuhnia microphylla]
                                                     [Kuhnia rosemarinifolia var. chlorolepis]
                                                     [Kuhnia rosmarinifolia var. chlorolepis]
                                                     [Kuhnia shaffneri]
                                               Brickellia eupatorioides var. corymbulosa
                                               Brickellia eupatorioides var. eupatorioides
                                               Brickellia eupatorioides var. floridana
                                               Brickellia eupatorioides var. gracillima
                                               Brickellia eupatorioides var. ozarkana
                                               Brickellia eupatorioides var. texana
                                             Brickellia filipes
                                             Brickellia floribunda
                                             Brickellia frutescens
                                             Brickellia glabrata
                                             Brickellia glandulosa
                                             Brickellia glomerata
                                             Brickellia glutinosa
                                             Brickellia grandiflora
                                                   [Brickellia grandiflora var. petiolaris]
                                                   [Coleosanthus grandiflorus]
                                             Brickellia greenei
                                             Brickellia guatemalensis
                                             Brickellia hartwegi
                                             Brickellia hastata
                                             Brickellia hebecarpa
                                             Brickellia hinckleyi
                                               Brickellia hinckleyi var. hinckleyi
                                               Brickellia hinckleyi var. terlinguensis
                                             Brickellia hintoniorum
                                             Brickellia hymenochlaena
                                             Brickellia incana
                                             Brickellia jaliscensis
                                             Brickellia knappiana
                                             Brickellia laciniata
                                             Brickellia lanata
                                             Brickellia laxiflora
                                             Brickellia lemmonii
                                               Brickellia lemmonii var. conduplicata
                                               Brickellia lemmonii var. lemmonii
                                                     [Brickellia viejensis]
                                               Brickellia lemmonii var. nelsonii
                                               Brickellia lemmonii var. wootonii
                                             Brickellia leptophylla
                                             Brickellia lewisii
                                             Brickellia longifolia
                                               Brickellia longifolia var. longifolia
                                               Brickellia longifolia var. multiflora
                                                     [Brickellia multiflora]
                                             Brickellia macromera
                                             Brickellia megalodonta
                                             Brickellia megaphylla
                                             Brickellia microphylla
                                               Brickellia microphylla var. microphylla
                                               Brickellia microphylla var. scabra
                                                     [Brickellia microphylla ssp. scabra]
                                                     [Brickellia scabra]
                                               Brickellia microphylla var. watsonii
                                                     [Brickellia watsonii]
                                             Brickellia mohavensis
                                             Brickellia monocephala
                                             Brickellia mosieri
                                             Brickellia nelsonii
                                             Brickellia nesomii
                                             Brickellia nevinii
                                             Brickellia nutans
                                             Brickellia nutanticeps
                                             Brickellia oblongifolia
                                               Brickellia oblongifolia var. abbreviata
                                               Brickellia oblongifolia var. linifolia
                                                     [Brickellia linifolia]
                                               Brickellia oblongifolia var. oblongifolia
                                               Brickellia oblongifolia var. typica
                                             Brickellia odontophylla
                                             Brickellia oliganthes
                                             Brickellia oreithales
                                             Brickellia orizabensis
                                             Brickellia pacayensis
                                             Brickellia palmeri
                                             Brickellia paniculata
                                             Brickellia parvula
                                             Brickellia pavonii
                                             Brickellia pedunculosa
                                             Brickellia pendula
                                             Brickellia peninsularis
                                             Brickellia petrophila
                                             Brickellia pringlei
                                             Brickellia problematica
                                             Brickellia pulcherrima
                                             Brickellia reniformis
                                             Brickellia rhomboidea
                                             Brickellia rosemarinifolia
                                             Brickellia rosmarinifolia
                                             Brickellia rusbyi
                                             Brickellia saltillensis
                                             Brickellia scaber
                                             Brickellia scoparia
                                             Brickellia secundiflora
                                               Brickellia secundiflora var. monticola
                                             Brickellia simplex
                                             Brickellia solidaginifolia
                                             Brickellia sonorana
                                                   [Barroetea sonorana]
                                             Brickellia spinulosa
                                               Brickellia spinulosa var. asperata
                                             Brickellia squarrosa
                                               Brickellia squarrosa var. oligadena
                                             Brickellia subuligera
                                             Brickellia tenera
                                             Brickellia thyrsiflora
                                             Brickellia tomentella
                                             Brickellia urolepis
                                             Brickellia venosa
                                                   [Coleosanthus venosus]
                                             Brickellia verbenacea
                                             Brickellia vernicosa
                                             Brickellia veronicaefolia
                                             Brickellia veronicifolia
                                               Brickellia veronicifolia var. petrophila
                                               Brickellia veronicifolia var. veronicifolia
                                             Brickellia wislizeni
                                               Brickellia wislizeni var. lanceolata
                                             Brickellia wrightii
                                     Brickelliastrum
                                             Brickelliastrum fendleri
                                                   [Brickellia fendleri]
                                                   [Eupatorium fendleri]
                                     Brintonia
                                             Brintonia discoidea
                                     Buphthalmum
                                             Buphthalmum arborescens
                                             Buphthalmum salicifolium
                                     Burrielia
                                             Burrielia chrysostoma
                                               Burrielia chrysostoma var. macrantha
                                             Burrielia gracilis
                                             Burrielia microglossa
                                             Burrielia nivea
                                             Burrielia parviflora
                                             Burrielia platycarpha
                                             Burrielia tenerrima
                                     Cacalia
                                             Cacalia auriculata
                                               Cacalia auriculata ssp. kamtschatica
                                             Cacalia coccinea
                                             Cacalia cordifolia
                                             Cacalia diversifolia
                                             Cacalia floridana
                                             Cacalia kamtschatica
                                             Cacalia michoacana
                                             Cacalia muehlenbergii
                                             Cacalia porophyllum
                                             Cacalia rugelia
                                             Cacalia sonchifolia
                                             Cacalia suaveolens
                                             Cacalia sulcata
                                     Cacaliopsis
                                             Cacaliopsis nardosmia
                                                   [Cacalia nardosmia var. glabrata]
                                                   [Cacalia nardosmia]
                                                   [Cacaliopsis nardosmia var. glabrata]
                                                   [Luina nardosmia var. glabrata]
                                                   [Luina nardosmia]
                                     Cacosmia
                                     Caenotus
                                             Caenotus canadensis
                                     Calais
                                             Calais bigelovii
                                             Calais bolanderi
                                             Calais cyclocarpha
                                             Calais kelloggii
                                             Calais linearifolia
                                             Calais macrochaeta
                                             Calais nutans
                                               Calais nutans var. latifolia
                                             Calais parryi
                                             Calais platycarpha
                                             Calais tenella
                                     Calea
                                           [Tournonia]
                                             Calea acaulis
                                             Calea angusta
                                             Calea aspera
                                             Calea clausseniana
                                             Calea cuneifolia
                                             Calea cymosa
                                             Calea gardneriana
                                             Calea hymenolepis
                                             Calea hypoleuca
                                             Calea ilienii
                                             Calea integrifolia
                                             Calea intermedia
                                             Calea jamaicensis
                                             Calea lantanoides
                                             Calea longifolia
                                             Calea longipedicellata
                                             Calea multijuga
                                             Calea nervosa
                                             Calea nitida
                                             Calea oppositifolia
                                             Calea palmeri
                                             Calea parvifolia
                                             Calea peckii
                                             Calea pinnatifida
                                             Calea polycephala
                                             Calea pringlei
                                             Calea quadrifolia
                                             Calea reticulata
                                             Calea rupicola
                                             Calea scabra
                                             Calea ternifolia
                                             Calea teucriifolia
                                             Calea tomentosa
                                             Calea trichotoma
                                             Calea uniflora
                                             Calea urticifolia
                                             Calea zacatechichi
                                     Calendula
                                             Calendula aegyptiaca
                                             Calendula arvensis
                                             Calendula officinalis
                                                   [Calendula officinalis var. prolifera]
                                     Calhounia
                                             Calhounia nelsonae
                                     Callicephalus
                                             Callicephalus nitens
                                     Callichroa
                                             Callichroa nutans
                                     Calliopsis
                                     Callistephus
                                             Callistephus chinensis
                                     Calocephalus
                                             Calocephalus brownii
                                     Calotis
                                             Calotis cuneifolia
                                     Calycadenia
                                             Calycadenia bicolor
                                             Calycadenia campestris
                                             Calycadenia cephalotes
                                             Calycadenia ciliosa
                                             Calycadenia elegans
                                             Calycadenia fremontii
                                             Calycadenia hispida
                                               Calycadenia hispida ssp. reducta
                                             Calycadenia hooveri
                                             Calycadenia micrantha
                                             Calycadenia mollis
                                             Calycadenia multiglandulosa
                                               Calycadenia multiglandulosa ssp. bicolor
                                               Calycadenia multiglandulosa ssp. cephalotes
                                               Calycadenia multiglandulosa ssp. robusta
                                             Calycadenia oppositifolia
                                             Calycadenia pauciflora
                                               Calycadenia pauciflora var. elegans
                                             Calycadenia plumosa
                                             Calycadenia ramulosa
                                             Calycadenia scabrella
                                             Calycadenia spicata
                                             Calycadenia truncata
                                               Calycadenia truncata ssp. microcephala
                                               Calycadenia truncata ssp. scabrella
                                               Calycadenia truncata ssp. truncata
                                               Calycadenia truncata var. scabrella
                                             Calycadenia villosa
                                     Calycoseris
                                             Calycoseris parryi
                                             Calycoseris wrightii
                                               Calycoseris wrightii var. californica
                                     Calydermos
                                     Calymmandra
                                             Calymmandra candida
                                     Calyptocarpus
                                             Calyptocarpus vialis
                                                   [Synedrella vialis]
                                                   [Synedrellopsis grisebachii]
                                             Calyptocarpus wendlandii
                                     Campovassouria
                                             Campovassouria bupleurifolia
                                     Campuloclinium
                                             Campuloclinium macrocephalum
                                     Canadanthus
                                             Canadanthus modestus
                                     Carduus
                                             Carduus acanthoides
                                               Carduus acanthoides ssp. acanthoides
                                             Carduus acuatus
                                             Carduus araneosus
                                             Carduus bernardinus
                                             Carduus callilepis
                                             Carduus candidissimus
                                             Carduus carolinianus
                                             Carduus centaureae
                                             Carduus crispus
                                             Carduus discolor
                                             Carduus erosus
                                             Carduus floccosus
                                             Carduus griseus
                                             Carduus helenioides
                                             Carduus helenoides
                                             Carduus lacerus
                                             Carduus laterifolius
                                             Carduus lecontei
                                             Carduus macounii
                                             Carduus maritima
                                             Carduus maritimus
                                             Carduus modestus
                                             Carduus nevadensis
                                             Carduus nutans
                                                   [Carduus macrocephalus]
                                                   [Carduus macrolepis]
                                                   [Carduus nutans ssp. leiophyllus]
                                                   [Carduus nutans ssp. macrocephalus]
                                                   [Carduus nutans ssp. macrolepis]
                                                   [Carduus nutans ssp. nutans]
                                                   [Carduus nutans var. leiophyllus]
                                                   [Carduus nutans var. macrocephalus]
                                                   [Carduus nutans var. vestitus]
                                             Carduus nuttallii
                                             Carduus oblanceolatus
                                             Carduus olivescens
                                             Carduus oreophilus
                                             Carduus osterhoutii
                                             Carduus perennans
                                             Carduus perplexans
                                             Carduus pinetorum
                                             Carduus pycnocephalus
                                               Carduus pycnocephalus ssp. pycnocephalus
                                             Carduus radicans
                                             Carduus repandus
                                             Carduus smallii
                                             Carduus spathulatus
                                             Carduus spinosissimus
                                             Carduus tenuiflorus
                                             Carduus vernalis
                                             Carduus vinaceus
                                             Carduus virginianus
                                             Carduus x orthocephalus
                                     Carlina
                                             Carlina vulgaris
                                               Carlina vulgaris ssp. longifolia
                                               Carlina vulgaris ssp. vulgaris
                                     Carlquistia
                                             Carlquistia muirii
                                     Carminatia
                                             Carminatia anomala
                                             Carminatia recondita
                                             Carminatia tenuiflora
                                     Carphephorus
                                             Carphephorus bellidifolius
                                             Carphephorus carnosus
                                             Carphephorus corymbosus
                                             Carphephorus odoratissimus
                                               Carphephorus odoratissimus var. odoratissimus
                                               Carphephorus odoratissimus var. subtropicanus
                                             Carphephorus paniculatus
                                             Carphephorus pseudoliatris
                                             Carphephorus tomentosus
                                               Carphephorus tomentosus var. walteri
                                     Carphochaete
                                             Carphochaete bigelovii
                                             Carphochaete grahami
                                             Carphochaete pringlei
                                               Carphochaete pringlei var. pringlei
                                               Carphochaete pringlei var. simulans
                                             Carphochaete wislizeni
                                             Carphochaete wislizenii
                                     Carpochaete
                                             Carpochaete bigelovii
                                     Carterothamnus
                                             Carterothamnus anomalochaeta
                                     Carthamus
                                             Carthamus baeticus
                                             Carthamus creticus
                                             Carthamus laevis
                                             Carthamus lanatus
                                               Carthamus lanatus ssp. baeticus
                                               Carthamus lanatus ssp. creticus
                                               Carthamus lanatus ssp. lanatus
                                             Carthamus leucocaulos
                                             Carthamus oxyacantha
                                             Carthamus oxyacanthus
                                             Carthamus tinctorius
                                     Castalis
                                             Castalis tragus
                                                   [Dimorphotheca aurantiaca]
                                     Catananche
                                             Catananche caerulea
                                             Catananche lutea
                                     Celmisia
                                             Celmisia spectabilis
                                     Centaurea
                                             Centaurea americana
                                             Centaurea aspera
                                             Centaurea austriaca
                                             Centaurea babylonica
                                             Centaurea benedicta
                                                   [Cnicus benedictus]
                                             Centaurea besseriana
                                             Centaurea biebersteinii
                                                   [Acosta maculosa]
                                                   [Centaurea maculosa]
                                             Centaurea bovina
                                             Centaurea calcitrapa
                                             Centaurea calcitrapoides
                                             Centaurea candidissima
                                             Centaurea carduiformis
                                             Centaurea chilensis
                                             Centaurea cineraria
                                             Centaurea cyanus
                                                   [Leucacantha cyanus]
                                             Centaurea dealbata
                                             Centaurea debeauxii
                                               Centaurea debeauxii ssp. thuillieri
                                             Centaurea depressa
                                             Centaurea diffusa
                                                   [Acosta diffusa]
                                             Centaurea diluta
                                             Centaurea dubia
                                               Centaurea dubia ssp. vochinensis
                                             Centaurea eriophora
                                             Centaurea erivanensis
                                             Centaurea iberica
                                             Centaurea jacea
                                             Centaurea macrocephala
                                             Centaurea melitensis
                                             Centaurea montana
                                                   [Centaurea montana var. alba]
                                             Centaurea muricata
                                             Centaurea nervosa
                                             Centaurea nigra
                                               Centaurea nigra var. radiata
                                             Centaurea nigrescens
                                             Centaurea orientalis
                                             Centaurea ornata
                                             Centaurea ovina
                                               Centaurea ovina ssp. besseriana
                                             Centaurea paniculata
                                             Centaurea phrygia
                                             Centaurea pratensis
                                             Centaurea ragusina
                                             Centaurea rothrockii
                                             Centaurea scabiosa
                                               Centaurea scabiosa var. vertesensis
                                             Centaurea solstitialis
                                                   [Leucantha solstitialis]
                                             Centaurea squarrosa
                                             Centaurea stoebe
                                               Centaurea stoebe ssp. micranthos
                                             Centaurea sulphurea
                                             Centaurea transalpina
                                             Centaurea trichocephala
                                             Centaurea triumfettii
                                             Centaurea uniflora
                                               Centaurea uniflora ssp. nervosa
                                             Centaurea ustulata
                                             Centaurea variegata
                                             Centaurea verutum
                                             Centaurea virgata
                                               Centaurea virgata ssp. squarrosa
                                               Centaurea virgata var. squarrosa
                                             Centaurea vochinensis
                                             Centaurea x moncktonii
                                             Centaurea x pouzinii
                                             Centaurea x psammogena
                                     Centipeda
                                             Centipeda minima
                                     Centratherum
                                             Centratherum camporum
                                             Centratherum muticum
                                             Centratherum punctatum
                                     Centroclinium
                                     Centromadia
                                             Centromadia fitchii
                                             Centromadia parryi
                                               Centromadia parryi ssp. australis
                                                     [Hemizonia australis]
                                                     [Hemizonia parryi ssp. australis]
                                               Centromadia parryi ssp. congdonii
                                               Centromadia parryi ssp. parryi
                                                     [Hemizonia parryi ssp. congdonii]
                                                     [Hemizonia parryi ssp. parryi]
                                                     [Hemizonia parryi ssp. rudis]
                                                     [Hemizonia parryi]
                                               Centromadia parryi ssp. rudis
                                             Centromadia pungens
                                               Centromadia pungens ssp. laevis
                                               Centromadia pungens ssp. maritima
                                               Centromadia pungens ssp. pungens
                                               Centromadia pungens ssp. septentrionalis
                                     Cephalophora
                                     Cephaloseris
                                     Chabraea
                                     Chaenactis
                                             Chaenactis alpigena
                                             Chaenactis artemisiaefolia
                                             Chaenactis artemisiifolia
                                             Chaenactis attenuata
                                             Chaenactis aurea
                                             Chaenactis carphoclinia
                                               Chaenactis carphoclinia var. carphoclinia
                                                     [Chaenactis carphoclinia var. attenuata]
                                               Chaenactis carphoclinia var. peirsonii
                                             Chaenactis cusickii
                                             Chaenactis douglasii
                                               Chaenactis douglasii var. alpina
                                                     [Chaenactis alpina var. leucopsis]
                                                     [Chaenactis alpina var. rubella]
                                                     [Chaenactis alpina]
                                                     [Chaenactis leucopsis]
                                                     [Chaenactis minuscula]
                                               Chaenactis douglasii var. douglasii
                                                     [Chaenactis angustifolia]
                                                     [Chaenactis brachiata var. stansburiana]
                                                     [Chaenactis brachiata]
                                                     [Chaenactis cineria]
                                                     [Chaenactis douglasii var. achilleifolia]
                                                     [Chaenactis douglasii var. glandulosa]
                                                     [Chaenactis douglasii var. montana]
                                                     [Chaenactis douglasii var. nana]
                                                     [Chaenactis douglasii var. rubricaulis]
                                                     [Chaenactis douglasii var. typicus]
                                                     [Chaenactis humilis]
                                                     [Chaenactis panamintensis]
                                                     [Chaenactis ramosa]
                                                     [Chaenactis rubricaulis]
                                                     [Chaenactis suksdorfii]
                                             Chaenactis evermannii
                                             Chaenactis fremonti
                                             Chaenactis fremontii
                                             Chaenactis furcata
                                             Chaenactis glabriuscula
                                               Chaenactis glabriuscula var. aurea
                                               Chaenactis glabriuscula var. curta
                                               Chaenactis glabriuscula var. denudata
                                               Chaenactis glabriuscula var. glabriuscula
                                               Chaenactis glabriuscula var. gracilenta
                                               Chaenactis glabriuscula var. heterocarpha
                                               Chaenactis glabriuscula var. lanosa
                                               Chaenactis glabriuscula var. megacephala
                                               Chaenactis glabriuscula var. orcuttiana
                                               Chaenactis glabriuscula var. tenuifolia
                                             Chaenactis heterocarpha
                                             Chaenactis lacera
                                             Chaenactis lanosa
                                             Chaenactis macrantha
                                             Chaenactis nevadensis
                                               Chaenactis nevadensis var. mainsiana
                                             Chaenactis nevii
                                             Chaenactis orcuttiana
                                             Chaenactis parishii
                                             Chaenactis pedicularia
                                             Chaenactis pumila
                                             Chaenactis santolinoides
                                               Chaenactis santolinoides var. indurata
                                             Chaenactis stevioides
                                                   [Chaenactis gillespiei]
                                                   [Chaenactis latifolia]
                                                   [Chaenactis mexicana]
                                                   [Chaenactis stevioides var. brachypappa]
                                                   [Chaenactis stevioides var. thornberi]
                                               Chaenactis stevioides var. stevioides
                                             Chaenactis suffrutescens
                                               Chaenactis suffrutescens var. incana
                                             Chaenactis tanacetifolia
                                               Chaenactis tanacetifolia var. gracilenta
                                             Chaenactis tenuifolia
                                               Chaenactis tenuifolia var. orcuttiana
                                             Chaenactis thompsonii
                                             Chaenactis xantiana
                                     Chaetadelpha
                                             Chaetadelpha wheeleri
                                     Chaetanthera
                                             Chaetanthera chilensis
                                             Chaetanthera elegans
                                             Chaetanthera glabrata
                                     Chaetopappa
                                             Chaetopappa alsinoides
                                             Chaetopappa asteroides
                                               Chaetopappa asteroides var. asteroides
                                               Chaetopappa asteroides var. grandis
                                               Chaetopappa asteroides var. imberbis
                                             Chaetopappa aurea
                                             Chaetopappa bellidiflora
                                             Chaetopappa bellidifolia
                                             Chaetopappa bellioides
                                               Chaetopappa bellioides var. hirticaulis
                                             Chaetopappa effusa
                                             Chaetopappa ericoides
                                                   [Aster arenosus]
                                                   [Aster ericaefolius]
                                                   [Aster hirtifolius]
                                                   [Aster leucelene]
                                                   [Inula ericoides]
                                                   [Leucelene ericoides]
                                             Chaetopappa exilis
                                             Chaetopappa fragilis
                                             Chaetopappa hersheyi
                                             Chaetopappa imberbis
                                             Chaetopappa lyonii
                                             Chaetopappa parryi
                                             Chaetopappa pulchella
                                     Chaetospira
                                     Chaetymenia
                                             Chaetymenia peduncularis
                                     Chamaechaenactis
                                             Chamaechaenactis scaposa
                                               Chamaechaenactis scaposa var. parva
                                               Chamaechaenactis scaposa var. scaposa
                                                     [Chaenactis scaposa]
                                     Chamaemelum
                                             Chamaemelum fuscatum
                                             Chamaemelum mixtum
                                             Chamaemelum nobile
                                                   [Anthemis nobilis]
                                     Chaptalia
                                             Chaptalia albicans
                                             Chaptalia angustata
                                             Chaptalia comptonioides
                                             Chaptalia confinis
                                             Chaptalia crispata
                                             Chaptalia dentata
                                             Chaptalia eggersii
                                             Chaptalia ekmanii
                                             Chaptalia estribensis
                                             Chaptalia fallax
                                             Chaptalia integerrima
                                             Chaptalia madrensis
                                             Chaptalia media
                                             Chaptalia membranacea
                                             Chaptalia montana
                                             Chaptalia mornicola
                                             Chaptalia nutans
                                             Chaptalia obovata
                                             Chaptalia pringlei
                                             Chaptalia pumila
                                             Chaptalia rocana
                                             Chaptalia runcinata
                                             Chaptalia shaferi
                                             Chaptalia sinuata
                                             Chaptalia sonchifolia
                                             Chaptalia spathulata
                                             Chaptalia stenocephala
                                             Chaptalia texana
                                                   [Chaptalia nutans var. texana]
                                             Chaptalia tomentosa
                                             Chaptalia vegaensis
                                     Charadranaetes
                                     Chardinia
                                             Chardinia macrocarpa
                                     Chersodoma
                                     Chevreulia
                                     Chiliophyllum
                                             Chiliophyllum densifolium
                                     Chiliotrichum
                                             Chiliotrichum diffusum
                                             Chiliotrichum rosmarinifolium
                                     Chionolaena
                                     Chionopappus
                                     Chloracantha
                                             Chloracantha spinosa
                                                   [Aster spinosus]
                                                   [Erigeron ortegae]
                                                   [Erigeron spinosus]
                                                   [Leucosyris spinosa]
                                               Chloracantha spinosa var. jaliscensis
                                               Chloracantha spinosa var. spinosa
                                               Chloracantha spinosa var. spinosissima
                                     Chlorocrepis
                                             Chlorocrepis tristis
                                               Chlorocrepis tristis ssp. gracilis
                                     Chondrilla
                                             Chondrilla juncea
                                     Chondrophora
                                             Chondrophora nudata
                                             Chondrophora virgata
                                     Chorisiva
                                             Chorisiva nevadensis
                                                   [Iva nevadensis]
                                     Chresta
                                             Chresta angustifolia
                                             Chresta exsucca
                                             Chresta harleyi
                                             Chresta pycnocephala
                                             Chresta scapigera
                                             Chresta speciosa
                                             Chresta sphaerocephala
                                     Chromolaena
                                             Chromolaena bahamensis
                                             Chromolaena bigelovii
                                                   [Eupatorium bigelovii]
                                             Chromolaena borinquensis
                                             Chromolaena callilepis
                                             Chromolaena chaseae
                                             Chromolaena christieana
                                             Chromolaena collina
                                             Chromolaena corymbosa
                                             Chromolaena dussii
                                             Chromolaena frustrata
                                             Chromolaena geraniifolia
                                             Chromolaena heteroclinia
                                             Chromolaena hirsuta
                                             Chromolaena horminoides
                                             Chromolaena integrifolia
                                             Chromolaena ivifolia
                                                   [Eupatorium ivifolium]
                                                   [Osmia ivifolia]
                                             Chromolaena kleinii
                                             Chromolaena leucocephala
                                             Chromolaena lucayana
                                             Chromolaena macrantha
                                             Chromolaena macrodon
                                             Chromolaena odorata
                                                   [Osmia odorata]
                                             Chromolaena ossaeana
                                             Chromolaena oteroi
                                             Chromolaena ovaliflora
                                                   [Eupatorium ovaliflorum]
                                             Chromolaena pedunculosa
                                             Chromolaena pulchella
                                             Chromolaena sagittata
                                                   [Eupatorium sagittatum]
                                               Chromolaena sagittata var. sagittata
                                             Chromolaena sinuata
                                             Chromolaena trigonocarpa
                                             Chromolaena verbenacea
                                     Chromolepis
                                             Chromolepis heterophylla
                                     Chrysactinia
                                             Chrysactinia acerosa
                                             Chrysactinia lehtoae
                                             Chrysactinia mexicana
                                             Chrysactinia pinnata
                                             Chrysactinia truncata
                                     Chrysactinium
                                     Chrysanthellum
                                             Chrysanthellum americanum
                                             Chrysanthellum indicum
                                               Chrysanthellum indicum var. mexicanum
                                             Chrysanthellum integrifolium
                                             Chrysanthellum involutum
                                             Chrysanthellum keilii
                                             Chrysanthellum mexicanum
                                             Chrysanthellum michoacanum
                                     Chrysanthemoides
                                             Chrysanthemoides monilifera
                                     Chrysanthemum
                                             Chrysanthemum anethifolium
                                             Chrysanthemum arcticum
                                               Chrysanthemum arcticum ssp. polare
                                               Chrysanthemum arcticum var. polare
                                             Chrysanthemum bipinnatum
                                               Chrysanthemum bipinnatum ssp. huronense
                                             Chrysanthemum cinerariifolium
                                             Chrysanthemum coccineum
                                             Chrysanthemum corymbosum
                                             Chrysanthemum integrifolium
                                             Chrysanthemum lacustre
                                             Chrysanthemum majus
                                             Chrysanthemum maximum
                                             Chrysanthemum morifolium
                                             Chrysanthemum nipponicum
                                             Chrysanthemum pacificum
                                             Chrysanthemum parthenium
                                             Chrysanthemum roseum
                                             Chrysanthemum x morifolium
                                                   [Dendranthema grandiflorum]
                                                   [Dendranthema x grandiflorum]
                                             Chrysanthemum x superbum
                                     Chrysocoma
                                             Chrysocoma graminifolia
                                             Chrysocoma nudata
                                     Chrysogonum
                                             Chrysogonum australe
                                             Chrysogonum virginianum
                                               Chrysogonum virginianum var. australe
                                               Chrysogonum virginianum var. brevistolon
                                               Chrysogonum virginianum var. dentatum
                                               Chrysogonum virginianum var. virginianum
                                     Chrysolaena
                                             Chrysolaena oligophylla
                                             Chrysolaena platensis
                                             Chrysolaena verbascifolia
                                     Chrysoma
                                             Chrysoma fasciculata
                                             Chrysoma pauciflosculosa
                                             Chrysoma solidaginoides
                                     Chrysopis
                                             Chrysopis latisquamea
                                     Chrysopsis
                                             Chrysopsis adenolepis
                                             Chrysopsis alpicola
                                               Chrysopsis alpicola var. glomerata
                                             Chrysopsis alpina
                                             Chrysopsis angustifolia
                                                   [Chrysopsis villosa var. angustifolia]
                                             Chrysopsis arenaria
                                             Chrysopsis aspera
                                             Chrysopsis asprella
                                             Chrysopsis ballardii
                                             Chrysopsis barbata
                                             Chrysopsis bolanderi
                                                   [Chrysopsis villosa var. bolanderi]
                                             Chrysopsis breweri
                                               Chrysopsis breweri var. multibracteata
                                             Chrysopsis californica
                                             Chrysopsis camphorata
                                                   [Chrysopsis villosa var. camphorata]
                                             Chrysopsis compacta
                                             Chrysopsis cooperi
                                             Chrysopsis cruiseana
                                             Chrysopsis delaneyi
                                             Chrysopsis depressa
                                             Chrysopsis echioides
                                                   [Chrysopsis villosa var. echioides]
                                             Chrysopsis elata
                                             Chrysopsis falcata
                                             Chrysopsis fastigiata
                                                   [Chrysopsis villosa var. fastigiata]
                                             Chrysopsis flexuosa
                                             Chrysopsis floridana
                                             Chrysopsis gigantea
                                             Chrysopsis godfreyi
                                             Chrysopsis gossypina
                                               Chrysopsis gossypina ssp. cruiseana
                                               Chrysopsis gossypina ssp. gossypina
                                                     [Chrysopsis arenicola]
                                                     [Chrysopsis decumbens]
                                                     [Chrysopsis longii]
                                                     [Chrysopsis trichophylla]
                                                     [Heterotheca gossypina]
                                                     [Heterotheca trichophylla]
                                                     [Inula gossypina]
                                               Chrysopsis gossypina ssp. hyssopifolia
                                             Chrysopsis gracilis
                                             Chrysopsis graminifolia
                                               Chrysopsis graminifolia var. aspera
                                               Chrysopsis graminifolia var. latifolia
                                               Chrysopsis graminifolia var. microcephala
                                             Chrysopsis highlandsensis
                                             Chrysopsis hyssopifolia
                                             Chrysopsis jonesii
                                             Chrysopsis lanuginosa
                                             Chrysopsis latisquamea
                                             Chrysopsis linearifolia
                                               Chrysopsis linearifolia ssp. dressii
                                               Chrysopsis linearifolia ssp. linearifolia
                                             Chrysopsis mariana
                                               Chrysopsis mariana var. floridana
                                               Chrysopsis mariana var. macradenia
                                             Chrysopsis microcephala
                                             Chrysopsis mixta
                                             Chrysopsis nervosa
                                             Chrysopsis nivea
                                             Chrysopsis oligantha
                                             Chrysopsis oregona
                                               Chrysopsis oregona var. compacta
                                               Chrysopsis oregona var. rudis
                                               Chrysopsis oregona var. scaberrima
                                             Chrysopsis pinifolia
                                             Chrysopsis pumila
                                             Chrysopsis ruthii
                                             Chrysopsis scabrella
                                             Chrysopsis scabrifolia
                                             Chrysopsis sessiliflora
                                                   [Chrysopsis villosa var. sessiliflora]
                                             Chrysopsis shastensis
                                             Chrysopsis stenophylla
                                                   [Chrysopsis hispida var. stenophylla]
                                                   [Chrysopsis villosa var. stenophylla]
                                             Chrysopsis subulata
                                             Chrysopsis tracyi
                                             Chrysopsis wrightii
                                     Chrysothamnus
                                             Chrysothamnus affinis
                                             Chrysothamnus angustus
                                             Chrysothamnus bakeri
                                             Chrysothamnus bolanderi
                                                   [Chrysothamnus nauseosus ssp. bolanderi]
                                             Chrysothamnus confinis
                                             Chrysothamnus corymbosus
                                             Chrysothamnus depressus
                                                   [Ericameria depressa]
                                             Chrysothamnus eremobius
                                             Chrysothamnus filifolius
                                             Chrysothamnus gramineus
                                                   [Ericameria graminea]
                                                   [Petradoria discoidea]
                                             Chrysothamnus greenei
                                                   [Chrysothamnus greenei ssp. filifolius]
                                                   [Chrysothamnus greenei var. filifolius]
                                                   [Ericameria filifolia]
                                             Chrysothamnus humilis
                                                   [Chrysothamnus viscidiflorus ssp. humilis]
                                                   [Chrysothamnus viscidiflorus var. humilis]
                                                   [Ericameria humilis]
                                             Chrysothamnus marianus
                                             Chrysothamnus molestus
                                                   [Chrysothamnus viscidiflorus var. molestus]
                                                   [Ericameria molesta]
                                               Chrysothamnus nauseosus var. bernardinus
                                             Chrysothamnus newberryi
                                             Chrysothamnus nivecaulis
                                             Chrysothamnus patens
                                             Chrysothamnus pulchellus
                                                   [Chrysothamnus pulchellus ssp. elatior]
                                                   [Ericameria pulchella var. elatior]
                                                   [Ericameria pulchella]
                                             Chrysothamnus scoparius
                                             Chrysothamnus scopulorum
                                                   [Hesperodoria scopulorum]
                                             Chrysothamnus spathulatus
                                                   [Chrysothamnus viscidiflorus var. ludens]
                                                   [Ericameria spathulata]
                                             Chrysothamnus stylosus
                                                   [Grindelia stylosa]
                                                   [Vanclevea stylosa]
                                             Chrysothamnus vaseyi
                                                   [Bigelovia vaseyi]
                                                   [Ericameria vaseyi]
                                             Chrysothamnus viscidiflorus
                                               Chrysothamnus viscidiflorus ssp. axillaris
                                                     [Chrysothamnus axillaris]
                                                     [Ericameria viscidiflora ssp. axillaris]
                                               Chrysothamnus viscidiflorus ssp. lanceolatus
                                                     [Chrysothamnus viscidiflorus ssp. elegans]
                                                     [Chrysothamnus viscidiflorus var. elegans]
                                                     [Chrysothamnus viscidiflorus var. lanceolatus]
                                                     [Ericameria viscidiflora ssp. lanceolata]
                                               Chrysothamnus viscidiflorus ssp. planifolius
                                                     [Ericameria viscidiflora ssp. planifolia]
                                               Chrysothamnus viscidiflorus ssp. puberulus
                                                     [Chrysothamnus viscidiflorus var. puberulus]
                                                     [Ericameria viscidiflora ssp. puberula]
                                               Chrysothamnus viscidiflorus ssp. viscidiflorus
                                                     [Chrysothamnus pumilus]
                                                     [Chrysothamnus viscidiflorus ssp. latifolius]
                                                     [Ericameria viscidiflora var. latifolia]
                                               Chrysothamnus viscidiflorus var. latifolius
                                               Chrysothamnus viscidiflorus var. stenophyllus
                                                     [Chrysothamnus viscidiflorus ssp. stenophyllus]
                                                     [Ericameria viscidiflora var. stenophylla]
                                               Chrysothamnus viscidiflorus var. viscidiflorus
                                                     [Chrysothamnus viscidiflorus ssp. pumilus]
                                                     [Chrysothamnus viscidiflorus ssp. typicus]
                                                     [Chrysothamnus viscidiflorus var. pumilus]
                                                     [Chrysothamnus viscidiflorus var. typicus]
                                                     [Ericameria viscidiflora]
                                             Chrysothamnus vulcanicus
                                             Chrysothamnus zionis
                                     Chthonia
                                             Chthonia glaucescens
                                     Chucoa
                                     Chuquiraga
                                             Chuquiraga aurea
                                             Chuquiraga avellanedae
                                             Chuquiraga brasiliensis
                                             Chuquiraga erinacea
                                             Chuquiraga insignis
                                             Chuquiraga jussieui
                                             Chuquiraga kingii
                                             Chuquiraga oppositifolia
                                             Chuquiraga rosulata
                                             Chuquiraga rotundifolia
                                             Chuquiraga straminea
                                             Chuquiraga ulicina
                                     Ciceronia
                                             Ciceronia chaptalioides
                                     Cichorium
                                             Cichorium endivia
                                             Cichorium intybus
                                                   [Cichorium intybus var. foliosum]
                                                   [Cichorium intybus var. sativum]
                                     Cineraria
                                             Cineraria multiflora
                                             Cineraria saxifraga
                                     Cirsium
                                             Cirsium acrolepis
                                             Cirsium altissimum
                                                   [Carduus altissimus]
                                                   [Cirsium altissimum var. biltmoreanum]
                                               Cirsium altissimum var. filipendulum
                                             Cirsium anartiolepis
                                             Cirsium andersonii
                                             Cirsium andrewsii
                                             Cirsium araneans
                                             Cirsium arcuum
                                             Cirsium aridum
                                             Cirsium arizonicum
                                               Cirsium arizonicum var. arizonicum
                                                     [Cnicus arizonicus]
                                               Cirsium arizonicum var. bipinnatum
                                                     [Carduus pulchellus]
                                                     [Carduus truncatus]
                                                     [Cirsium bipinnatum]
                                                     [Cirsium calcareum var. bipinnatum]
                                                     [Cirsium calcareum var. pulchellum]
                                                     [Cirsium calcareum]
                                                     [Cirsium pulchellum ssp. bipinnatum]
                                                     [Cirsium pulchellum var. glabrescens]
                                                     [Cirsium pulchellum]
                                                     [Cnicus calcareus]
                                               Cirsium arizonicum var. chellyense
                                               Cirsium arizonicum var. nidulum
                                                     [Cirsium nidulum]
                                               Cirsium arizonicum var. rothrockii
                                                     [Cirsium diffusum]
                                                     [Cirsium pulchellum ssp. diffusum]
                                                     [Cirsium rothrockii]
                                               Cirsium arizonicum var. tenuisectum
                                             Cirsium arvense
                                                   [Breea arvensis]
                                                   [Breea incana]
                                                   [Carduus arvensis]
                                                   [Cirsium arvense var. argenteum]
                                                   [Cirsium arvense var. horridum]
                                                   [Cirsium arvense var. integrifolium]
                                                   [Cirsium arvense var. mite]
                                                   [Cirsium arvense var. vestitum]
                                                   [Cirsium incanum]
                                                   [Cirsium setosum]
                                                   [Serratula arvensis]
                                             Cirsium barnebyi
                                             Cirsium botrys
                                             Cirsium brevifolium
                                             Cirsium brevistylum
                                             Cirsium breweri
                                               Cirsium breweri var. lanosissimum
                                               Cirsium breweri var. wrangelii
                                               Cirsium breweri var. canescens
                                             Cirsium campylon
                                             Cirsium canescens
                                                   [Carduus undulatus var. canescens]
                                                   [Cirsium nebraskense]
                                                   [Cirsium nelsonii]
                                                   [Cirsium plattense]
                                             Cirsium canovirens
                                             Cirsium canum
                                             Cirsium carolinianum
                                             Cirsium centaureae
                                             Cirsium chellyense
                                             Cirsium chuskaense
                                             Cirsium ciliolatum
                                             Cirsium clavatum
                                               Cirsium clavatum var. americanum
                                               Cirsium clavatum var. clavatum
                                               Cirsium clavatum var. osterhoutii
                                             Cirsium clokeyi
                                                   [Cirsium eatonii var. clokeyi]
                                             Cirsium coahuilense
                                             Cirsium conspicuum
                                             Cirsium coulteri
                                             Cirsium crassicaule
                                             Cirsium cymosum
                                               Cirsium cymosum var. cymosum
                                               Cirsium cymosum var. canovirens
                                             Cirsium davisii
                                             Cirsium discolor
                                             Cirsium douglasii
                                               Cirsium douglasii var. breweri
                                               Cirsium douglasii var. canescens
                                               Cirsium douglasii var. douglasii
                                             Cirsium drummondii
                                                   [Cirsium coccinatum]
                                             Cirsium durangense
                                             Cirsium eatonii
                                                   [Cirsium eatonii var. harrisonii]
                                                   [Cirsium eriocephalum var. leiocephalum]
                                                   [Cirsium hookerianum var. eriocephalum]
                                                   [Cirsium olivescens]
                                                   [Cirsium polyphyllum]
                                                   [Cirsium tweedyi]
                                               Cirsium eatonii var. eatonii
                                               Cirsium eatonii var. eriocephalum
                                               Cirsium eatonii var. hesperium
                                               Cirsium eatonii var. murdockii
                                               Cirsium eatonii var. peckii
                                               Cirsium eatonii var. viperinum
                                             Cirsium edule
                                               Cirsium edule var. edule
                                               Cirsium edule var. macounii
                                               Cirsium edule var. wenatchense
                                             Cirsium ehrenbergii
                                             Cirsium engelmannii
                                             Cirsium filipendulum
                                             Cirsium flaccidum
                                             Cirsium flodmanii
                                                   [Cirsium nebraskense var. discissum]
                                                   [Cirsium oblanceolatum]
                                             Cirsium foliosum
                                                   [Cirsium foliosum var. minganense]
                                             Cirsium fontinale
                                               Cirsium fontinale var. campylon
                                               Cirsium fontinale var. fontinale
                                               Cirsium fontinale var. obispoense
                                             Cirsium giganteum
                                             Cirsium gilense
                                             Cirsium grahami
                                             Cirsium grahamii
                                             Cirsium griseum
                                             Cirsium hallii
                                             Cirsium helenioides
                                             Cirsium heterophyllum
                                             Cirsium hillii
                                             Cirsium hookerianum
                                             Cirsium horridulum
                                               Cirsium horridulum var. elliottii
                                               Cirsium horridulum var. horridulum
                                               Cirsium horridulum var. megacanthum
                                               Cirsium horridulum var. vittatum
                                             Cirsium howellii
                                             Cirsium humboldtense
                                             Cirsium hydrophilum
                                               Cirsium hydrophilum var. hydrophilum
                                               Cirsium hydrophilum var. vaseyi
                                             Cirsium inamoenum
                                               Cirsium inamoenum var. davisii
                                               Cirsium inamoenum var. inamoenum
                                             Cirsium inornatum
                                             Cirsium japonicum
                                             Cirsium joannae
                                             Cirsium jorullense
                                             Cirsium kamtschaticum
                                             Cirsium laterifolium
                                             Cirsium lecontei
                                             Cirsium lomatolepis
                                             Cirsium loncholepis
                                             Cirsium longistylum
                                             Cirsium macounii
                                             Cirsium maritimum
                                             Cirsium mexicanum
                                                   [Cnicus portoricensis]
                                             Cirsium modestum
                                             Cirsium mohavense
                                             Cirsium montigenum
                                             Cirsium murdockii
                                             Cirsium muticum
                                                   [Carduus muticus]
                                                   [Cirsium bigelovii]
                                                   [Cirsium muticum var. monticola]
                                                   [Cirsium muticum var. subpinnatifidum]
                                             Cirsium navajoense
                                             Cirsium neomexicanum
                                                   [Carduus inamoenus]
                                                   [Cirsium neomexicanum var. utahense]
                                                   [Cirsium utahense]
                                                   [Cirsium wallowense]
                                               Cirsium neomexicanum var. neomexicanum
                                             Cirsium nuttallii
                                             Cirsium occidentale
                                               Cirsium occidentale var. californicum
                                                     [Cirsium californicum ssp. pseudoreglense]
                                                     [Cirsium californicum var. bernardinum]
                                                     [Cirsium californicum]
                                               Cirsium occidentale var. candidissimum
                                                     [Cirsium candidissimum]
                                                     [Cirsium pastoris]
                                               Cirsium occidentale var. compactum
                                               Cirsium occidentale var. coulteri
                                               Cirsium occidentale var. occidentale
                                               Cirsium occidentale var. venustum
                                               Cirsium occidentale var. lucianum
                                             Cirsium ochrocentrum
                                                   [Cnicus ochrocentrus]
                                               Cirsium ochrocentrum ssp. martinii
                                               Cirsium ochrocentrum ssp. ochrocentrum
                                               Cirsium ochrocentrum var. martinii
                                               Cirsium ochrocentrum var. ochrocentrum
                                               Cirsium ochrocentrum var. townsendii
                                             Cirsium orizabense
                                             Cirsium osterhoutii
                                             Cirsium ownbeyi
                                             Cirsium pallidum
                                             Cirsium palousense
                                             Cirsium palustre
                                             Cirsium parryi
                                               Cirsium parryi ssp. mogollonicum
                                               Cirsium parryi ssp. parryi
                                                     [Cnicus parryi]
                                             Cirsium peckii
                                             Cirsium perplexans
                                             Cirsium pinetorum
                                             Cirsium pitcheri
                                             Cirsium praeteriens
                                             Cirsium pringlei
                                             Cirsium proteanum
                                             Cirsium pulcherrimum
                                               Cirsium pulcherrimum var. aridum
                                               Cirsium pulcherrimum var. pulcherrimum
                                             Cirsium pumilum
                                                   [Carduus pumilus]
                                                   [Cirsium odoratum]
                                               Cirsium pumilum ssp. hillii
                                               Cirsium pumilum var. hillii
                                               Cirsium pumilum var. pumilum
                                             Cirsium pyrenaicum
                                             Cirsium quercetorum
                                               Cirsium quercetorum var. mendocinum
                                               Cirsium quercetorum var. quercetorum
                                               Cirsium quercetorum var. walkerianum
                                               Cirsium quercetorum var. xerolepis
                                             Cirsium remotifolium
                                                   [Cirsium acanthodontum]
                                                   [Cirsium amblylepis]
                                                   [Cirsium callilepis var. oregonense]
                                                   [Cirsium callilepis var. pseudocarlinoides]
                                                   [Cirsium callilepis]
                                                   [Cirsium mendocinum]
                                                   [Cirsium oreganum]
                                                   [Cirsium remotifolium ssp. oregonense]
                                                   [Cirsium remotifolium ssp. pseudocarlinoides]
                                                   [Cirsium remotifolium ssp. remotifolium]
                                                   [Cirsium stenolepidum]
                                               Cirsium remotifolium var. odontolepis
                                               Cirsium remotifolium var. remotifolium
                                               Cirsium remotifolium var. rivulare
                                             Cirsium repandum
                                             Cirsium revolutum
                                             Cirsium rhaphilepis
                                             Cirsium rhothophilum
                                             Cirsium rusbyi
                                             Cirsium rydbergii
                                                   [Cirsium lactucinum]
                                             Cirsium scabrum
                                             Cirsium scapanolepis
                                             Cirsium scariosum
                                                   [Cirsium butleri]
                                                   [Cirsium congdonii]
                                                   [Cirsium erosum]
                                                   [Cirsium kelseyi]
                                                   [Cirsium lacerum]
                                                   [Cirsium magnificum]
                                                   [Cirsium minganense]
                                                   [Cirsium oreophilum]
                                                   [Cirsium x erosum]
                                               Cirsium scariosum var. americanum
                                               Cirsium scariosum var. citrinum
                                               Cirsium scariosum var. coloradense
                                               Cirsium scariosum var. congdonii
                                               Cirsium scariosum var. scariosum
                                               Cirsium scariosum var. thorneae
                                               Cirsium scariosum var. toiyabense
                                               Cirsium scariosum var. robustum
                                             Cirsium scopulorum
                                                   [Cirsium eriocephalum]
                                                   [Cirsium hesperium]
                                             Cirsium smallii
                                             Cirsium spathulifolium
                                             Cirsium subcoriaceum
                                             Cirsium subniveum
                                             Cirsium subuliforme
                                             Cirsium terraenigrae
                                             Cirsium texanum
                                                   [Carduus austrinus]
                                                   [Cirsium texanum var. stenolepis]
                                             Cirsium tioganum
                                               Cirsium tioganum var. coloradense
                                                     [Carduus coloradensis]
                                                     [Cirsium coloradense]
                                               Cirsium tioganum var. tioganum
                                                     [Carduus americanus]
                                                     [Cirsium acaule var. americanum]
                                                     [Cirsium acaulescens]
                                                     [Cirsium americanum]
                                                     [Cirsium coloradense ssp. acaulescens]
                                                     [Cirsium coloradense ssp. longissimum]
                                                     [Cirsium drummondii ssp. lanatum]
                                                     [Cirsium drummondii ssp. latisquamum]
                                                     [Cirsium drummondii ssp. vexans]
                                                     [Cirsium drummondii var. acaulescens]
                                                     [Cirsium drummondii var. oregonense]
                                                     [Cirsium quercetorum var. citrinum]
                                                     [Cnicus drummondii var. acaulescens]
                                                     [Cnicus tioganus]
                                             Cirsium tolucanum
                                             Cirsium trachylomum
                                             Cirsium tracyi
                                                   [Cirsium undulatum var. tracyi]
                                             Cirsium triacanthum
                                             Cirsium turneri
                                             Cirsium undulatum
                                               Cirsium undulatum var. undulatum
                                                     [Carduus helleri]
                                                     [Carduus undulatus]
                                                     [Cirsium helleri]
                                                     [Cirsium megacephalum]
                                                     [Cirsium ochrocentrum var. helleri]
                                                     [Cirsium undulatum var. megacephalum]
                                                     [Cnicus undulatus var. megacephalus]
                                             Cirsium validus
                                             Cirsium vaseyi
                                               Cirsium vaseyi var. hydrophilum
                                             Cirsium vernale
                                             Cirsium vinaceum
                                             Cirsium virginense
                                             Cirsium virginianum
                                             Cirsium vittatum
                                             Cirsium vulgare
                                                   [Carduus lanceolatus]
                                                   [Carduus vulgaris]
                                                   [Cirsium lanceolatum var. hypoleucum]
                                                   [Cirsium lanceolatum]
                                             Cirsium walkerianum
                                             Cirsium wheeleri
                                                   [Cirsium blumeri]
                                                   [Cirsium perennans]
                                                   [Cnicus wheeleri]
                                             Cirsium wrightii
                                             Cirsium x canalense
                                             Cirsium x crassum
                                             Cirsium x iowense
                                             Cirsium x vancouverense
                                     Cladanthus
                                             Cladanthus mixtus
                                     Clappia
                                             Clappia suaedaefolia
                                             Clappia suaedifolia
                                     Clavigera
                                             Clavigera spinulosa
                                     Clibadium
                                             Clibadium anceps
                                             Clibadium arboreum
                                             Clibadium erosum
                                             Clibadium leiocarpum
                                             Clibadium pentaneuron
                                             Clibadium surinamense
                                             Clibadium sylvestre
                                             Clibadium terebinthinaceum
                                     Clomenocoma
                                             Clomenocoma laciniata
                                     Cnicothamnus
                                     Cnicus
                                             Cnicus amplifolius
                                             Cnicus arvensis
                                             Cnicus breweri
                                               Cnicus breweri var. vaseyi
                                             Cnicus clavatus
                                             Cnicus lilacinus
                                             Cnicus nidulus
                                             Cnicus quercetorum
                                             Cnicus raphilepis
                                             Cnicus velatus
                                     Coespeletia
                                     Coleosanthus
                                             Coleosanthus albicaulis
                                             Coleosanthus ambigens
                                             Coleosanthus axillaris
                                             Coleosanthus brachyphyllus
                                             Coleosanthus chenopodinus
                                             Coleosanthus cordifolius
                                             Coleosanthus humilis
                                             Coleosanthus modestus
                                             Coleosanthus nepetifolius
                                             Coleosanthus venulosus
                                     Coleostephus
                                             Coleostephus myconis
                                     Columbiadoria
                                             Columbiadoria hallii
                                     Comaclinium
                                     Commidendrum
                                             Commidendrum robustum
                                     Complaya
                                             Complaya gracilis
                                     Condylidium
                                             Condylidium iresinoides
                                     Condylopodium
                                     Coniothele
                                             Coniothele californica
                                     Conoclinium
                                             Conoclinium betonicifolium
                                               Conoclinium betonicifolium var. betonicifolium
                                               Conoclinium betonicifolium var. integrifolium
                                             Conoclinium coelestinum
                                                   [Eupatorium coelestinum]
                                             Conoclinium dissectum
                                             Conoclinium greggii
                                                   [Eupatorium greggii]
                                             Conoclinium mayfieldii
                                     Constancea
                                             Constancea nevinii
                                     Conyza
                                             Conyza apurensis
                                             Conyza asperifolia
                                             Conyza bilbaoana
                                             Conyza bilboana
                                             Conyza bonariensis
                                                   [Erigeron bonariensis]
                                                   [Erigeron crispus]
                                                   [Erigeron linifolius]
                                                   [Leptilon bonariense]
                                                   [Leptilon linifolium]
                                               Conyza bonariensis var. bonariensis
                                               Conyza bonariensis var. leiotheca
                                             Conyza boranensis
                                             Conyza canadensis
                                               Conyza canadensis var. canadensis
                                                     [Erigeron canadensis]
                                                     [Leptilon canadense]
                                               Conyza canadensis var. glabrata
                                                     [Erigeron canadensis var. glabratus]
                                               Conyza canadensis var. pusilla
                                                     [Conyza parva]
                                                     [Erigeron canadensis var. pusillus]
                                                     [Erigeron pusillus]
                                                     [Leptilon pusillum]
                                               Conyza canadensis var. pusillus
                                             Conyza chilensis
                                             Conyza cinerea
                                             Conyza confusa
                                             Conyza coronopifolia
                                             Conyza dentonae
                                             Conyza erythrolaena
                                             Conyza filaginoides
                                             Conyza floribunda
                                             Conyza gnaphalioides
                                             Conyza laevigata
                                                   [Conyza subspathulata]
                                                   [Erigeron apurensis]
                                                   [Erigeron chinensis]
                                                   [Erigeron spathulatus]
                                                   [Leptilon chinense]
                                             Conyza linifolia
                                             Conyza lobata
                                             Conyza magnimontana
                                             Conyza microcephala
                                             Conyza notobellidiastrum
                                             Conyza primulifolia
                                             Conyza ramosissima
                                                   [Erigeron divaricatus]
                                                   [Leptilon divaricatum]
                                             Conyza sophiaefolia
                                             Conyza subdecurrens
                                     Conyzella
                                             Conyzella canadensis
                                     Coreocarpus
                                             Coreocarpus arizonicus
                                               Coreocarpus arizonicus var. arizonicus
                                               Coreocarpus arizonicus var. filiformis
                                               Coreocarpus arizonicus var. macrophyllus
                                               Coreocarpus arizonicus var. pubescens
                                             Coreocarpus congregatus
                                             Coreocarpus dissectus
                                               Coreocarpus dissectus var. longilobus
                                             Coreocarpus heterocarpus
                                             Coreocarpus involutus
                                             Coreocarpus parthenioides
                                               Coreocarpus parthenioides var. heterocarpus
                                               Coreocarpus parthenioides var. parthenioides
                                             Coreocarpus sanpedroensis
                                             Coreocarpus shrevei
                                               Coreocarpus shrevei var. latilobus
                                             Coreocarpus sonoranus
                                               Coreocarpus sonoranus var. libranus
                                               Coreocarpus sonoranus var. sonoranus
                                     Coreopsis
                                             Coreopsis aristosa
                                             Coreopsis auriculata
                                             Coreopsis basalis
                                                   [Calliopsis basalis]
                                                   [Coreopsis drummondii]
                                             Coreopsis bigelovii
                                                   [Leptosyne bigelovii]
                                                   [Pugiopappus bigelovii]
                                             Coreopsis californica
                                               Coreopsis californica var. californica
                                               Coreopsis californica var. newberryi
                                                     [Coreopsis newberryi]
                                             Coreopsis calliopsidea
                                                   [Agarista calliopsidea]
                                             Coreopsis congregata
                                             Coreopsis corninsularis
                                             Coreopsis debilis
                                             Coreopsis delphiniifolia
                                               Coreopsis delphiniifolia var. chlooidea
                                             Coreopsis douglasii
                                                   [Coreopsis stillmanii var. jonesii]
                                                   [Leptosyne douglasii]
                                             Coreopsis falcata
                                             Coreopsis floridana
                                             Coreopsis gigantea
                                                   [Leptosyne gigantea]
                                                   [Tuckermannia gigantea]
                                             Coreopsis gladiata
                                                   [Coreopsis angustifolia]
                                                   [Coreopsis helianthoides]
                                                   [Coreopsis longifolia var. godfreyi]
                                                   [Coreopsis longifolia]
                                               Coreopsis gladiata var. linifolia
                                             Coreopsis grandiflora
                                               Coreopsis grandiflora var. grandiflora
                                               Coreopsis grandiflora var. harveyana
                                               Coreopsis grandiflora var. inclinata
                                               Coreopsis grandiflora var. longipes
                                                     [Coreopsis longipes]
                                               Coreopsis grandiflora var. pilosa
                                               Coreopsis grandiflora var. saxicola
                                             Coreopsis hamiltonii
                                             Coreopsis heterolepis
                                             Coreopsis insularis
                                             Coreopsis integrifolia
                                             Coreopsis intermedia
                                             Coreopsis lanceolata
                                                   [Coreopsis crassifolia]
                                                   [Coreopsis heterogyna]
                                                   [Coreopsis lanceolata var. villosa]
                                             Coreopsis latifolia
                                             Coreopsis leavenworthii
                                                   [Coreopsis angustata]
                                                   [Coreopsis leavenworthii var. curtissii]
                                                   [Coreopsis leavenworthii var. garberi]
                                                   [Coreopsis leavenworthii var. lewtonii]
                                                   [Coreopsis lewtonii]
                                             Coreopsis linifolia
                                             Coreopsis major
                                                   [Coreopsis major var. oemleri]
                                                   [Coreopsis major var. rigida]
                                                   [Coreopsis major var. stellata]
                                               Coreopsis major var. linearis
                                             Coreopsis maritima
                                                   [Tuckermannia maritima]
                                             Coreopsis mutica
                                               Coreopsis mutica var. carnosifolia
                                             Coreopsis nudata
                                             Coreopsis nuecensis
                                             Coreopsis nuecensoides
                                             Coreopsis oniscicarpa
                                               Coreopsis oniscicarpa var. simulans
                                             Coreopsis palmata
                                             Coreopsis parvifolia
                                             Coreopsis petrophila
                                             Coreopsis petrophiloides
                                             Coreopsis pringlei
                                             Coreopsis pubescens
                                               Coreopsis pubescens var. debilis
                                               Coreopsis pubescens var. pubescens
                                               Coreopsis pubescens var. robusta
                                             Coreopsis pulchra
                                             Coreopsis reptans
                                             Coreopsis rhyacophila
                                             Coreopsis rosea
                                             Coreopsis saxicola
                                               Coreopsis saxicola var. duncanii
                                             Coreopsis saxicoloidea
                                             Coreopsis stillmanii
                                                   [Leptosyne stillmanii]
                                             Coreopsis tinctoria
                                               Coreopsis tinctoria var. atkinsoniana
                                                     [Coreopsis atkinsoniana]
                                               Coreopsis tinctoria var. similis
                                                     [Coreopsis similis]
                                               Coreopsis tinctoria var. tinctoria
                                                     [Coreopsis cardaminefolia]
                                                     [Coreopsis stenophylla]
                                                     [Coreopsis tinctoria var. imminuta]
                                             Coreopsis trichosperma
                                             Coreopsis tripteris
                                                   [Coreopsis tripteris var. deamii]
                                                   [Coreopsis tripteris var. intercedens]
                                                   [Coreopsis tripteris var. smithii]
                                                   [Coreopsis tripteris var. subrhomboidea]
                                             Coreopsis verticillata
                                             Coreopsis wrightii
                                                   [Coreopsis basalis var. wrightii]
                                                   [Coreopsis drummondii var. wrightii]
                                     Corethrogyne
                                             Corethrogyne californica
                                               Corethrogyne californica var. californica
                                               Corethrogyne californica var. lyonii
                                               Corethrogyne californica var. obovata
                                             Corethrogyne filaginifolia
                                               Corethrogyne filaginifolia var. bernardina
                                               Corethrogyne filaginifolia var. brevicula
                                               Corethrogyne filaginifolia var. californica
                                               Corethrogyne filaginifolia var. filaginifolia
                                               Corethrogyne filaginifolia var. glomerata
                                               Corethrogyne filaginifolia var. hamiltonensis
                                               Corethrogyne filaginifolia var. incana
                                               Corethrogyne filaginifolia var. latifolia
                                               Corethrogyne filaginifolia var. linifolia
                                               Corethrogyne filaginifolia var. peirsonii
                                               Corethrogyne filaginifolia var. pinetorum
                                               Corethrogyne filaginifolia var. rigida
                                               Corethrogyne filaginifolia var. robusta
                                               Corethrogyne filaginifolia var. sessilis
                                               Corethrogyne filaginifolia var. virgata
                                               Corethrogyne filaginifolia var. viscidula
                                               Corethrogyne filaginifolia var. pacifica
                                             Corethrogyne flagellaris
                                             Corethrogyne floccosa
                                             Corethrogyne incana
                                             Corethrogyne leucophylla
                                             Corethrogyne linifolia
                                             Corethrogyne obovata
                                             Corethrogyne scabra
                                             Corethrogyne sessilis
                                             Corethrogyne spathulata
                                             Corethrogyne tomentella
                                               Corethrogyne virgata var. bernardina
                                             Corethrogyne viscidula
                                               Corethrogyne viscidula var. greenei
                                     Cosmos
                                             Cosmos atrosanguineus
                                             Cosmos bipinnatus
                                             Cosmos carvifolius
                                             Cosmos caudatus
                                             Cosmos crithmifolius
                                             Cosmos diversifolius
                                             Cosmos linearifolius
                                               Cosmos linearifolius var. magnifolius
                                             Cosmos montanus
                                             Cosmos ochroleucoflorus
                                             Cosmos palmeri
                                             Cosmos parviflorus
                                                   [Coreopsis parviflora]
                                             Cosmos pringlei
                                             Cosmos scabiosoides
                                             Cosmos sulphureus
                                     Cota
                                             Cota altissima
                                             Cota tinctoria
                                                   [Anthemis tinctoria]
                                     Cotula
                                             Cotula australis
                                             Cotula coronopifolia
                                             Cotula mexicana
                                             Cotula scariosa
                                             Cotula verbesina
                                     Coulterella
                                             Coulterella capitata
                                     Cousinia
                                             Cousinia compacta
                                     Craspedia
                                             Craspedia glauca
                                             Craspedia uniflora
                                     Crassina
                                     Crassocephalum
                                             Crassocephalum crepidioides
                                             Crassocephalum vitellinum
                                     Crepis
                                             Crepis aculeata
                                             Crepis acuminata
                                               Crepis acuminata ssp. acuminata
                                                     [Crepis acuminata ssp. typica]
                                                     [Psilochenia acuminata ssp. pluriflora]
                                                     [Psilochenia acuminata]
                                               Crepis acuminata ssp. pluriflora
                                             Crepis alpicola
                                             Crepis andersonii
                                             Crepis angustata
                                             Crepis arabica
                                             Crepis atrabarba
                                             Crepis atribarba
                                               Crepis atribarba ssp. atribarba
                                               Crepis atribarba ssp. cytotaxonomicorum
                                               Crepis atribarba ssp. originalis
                                               Crepis atribarba ssp. typicus
                                               Crepis atribarba var. cytotaxonomicorum
                                             Crepis bakeri
                                               Crepis bakeri ssp. bakeri
                                               Crepis bakeri ssp. cusickii
                                               Crepis bakeri ssp. idahoensis
                                             Crepis barbata
                                             Crepis barbigera
                                             Crepis biennis
                                             Crepis bursifolia
                                             Crepis capillaris
                                             Crepis denticulata
                                             Crepis elegans
                                             Crepis exilis
                                             Crepis foetida
                                               Crepis foetida var. foetida
                                               Crepis foetida var. rhoeadifolia
                                             Crepis glaucella
                                             Crepis intermedia
                                                   [Crepis acuminata var. intermedia]
                                                   [Psilochenia intermedia]
                                             Crepis kotschyana
                                             Crepis lampsanoides
                                             Crepis modocensis
                                               Crepis modocensis ssp. glareosa
                                               Crepis modocensis ssp. modocensis
                                               Crepis modocensis ssp. rostrata
                                               Crepis modocensis ssp. subacaulis
                                               Crepis modocensis ssp. typica
                                               Crepis modocensis var. rostrata
                                             Crepis mogollonica
                                             Crepis monticola
                                             Crepis nana
                                               Crepis nana ssp. clivicola
                                               Crepis nana ssp. nana
                                               Crepis nana ssp. ramosa
                                               Crepis nana ssp. typica
                                               Crepis nana var. lyratifolia
                                               Crepis nana var. ramosa
                                             Crepis neomexicana
                                             Crepis nicaeensis
                                             Crepis occidentalis
                                               Crepis occidentalis ssp. conjuncta
                                               Crepis occidentalis ssp. costata
                                                     [Crepis occidentalis var. costata]
                                                     [Psilochenia occidentalis ssp. costata]
                                               Crepis occidentalis ssp. occidentalis
                                                     [Crepis occidentalis ssp. typica]
                                                     [Psilochenia occidentalis ssp. conjuncta]
                                                     [Psilochenia occidentalis]
                                               Crepis occidentalis ssp. pumila
                                               Crepis occidentalis var. gracilis
                                               Crepis occidentalis var. nevadensis
                                               Crepis occidentalis var. pumila
                                             Crepis paludosa
                                             Crepis pannonica
                                             Crepis perplexans
                                             Crepis petiolata
                                             Crepis platyphylla
                                             Crepis pleurocarpa
                                             Crepis pulchra
                                             Crepis rigida
                                             Crepis riparia
                                             Crepis rubra
                                             Crepis runcinata
                                               Crepis runcinata ssp. andersonii
                                               Crepis runcinata ssp. barberi
                                                     [Crepis barberi]
                                                     [Crepis glauca ssp. barberi]
                                                     [Crepis runcinata var. barberi]
                                                     [Psilochenia runcinata ssp. barberi]
                                               Crepis runcinata ssp. glauca
                                                     [Crepis glauca]
                                                     [Crepis runcinata var. glauca]
                                                     [Psilochenia runcinata ssp. glauca]
                                               Crepis runcinata ssp. hallii
                                               Crepis runcinata ssp. hispidulosa
                                               Crepis runcinata ssp. imbricata
                                               Crepis runcinata ssp. runcinata
                                               Crepis runcinata ssp. typica
                                               Crepis runcinata var. andersonii
                                               Crepis runcinata var. hispidulosa
                                               Crepis runcinata var. imbricata
                                             Crepis sancta
                                             Crepis scopulorum
                                             Crepis setosa
                                             Crepis tectorum
                                             Crepis vesicaria
                                               Crepis vesicaria ssp. haenseleri
                                               Crepis vesicaria ssp. taraxacifolia
                                               Crepis vesicaria var. taraxacifolia
                                             Crepis zacintha
                                     Critonia
                                             Critonia adamsii
                                                   [Adenocritonia adamsii]
                                             Critonia eriocarpa
                                             Critonia hebebotrya
                                             Critonia iltisii
                                             Critonia morifolia
                                             Critonia portoricensis
                                             Critonia quadrangularis
                                                   [Eupatorium quadrangulare]
                                     Critoniadelphus
                                     Critoniella
                                     Critoniopsis
                                             Critoniopsis foliosa
                                             Critoniopsis macvaughii
                                     Crocidium
                                             Crocidium multicaule
                                     Crockeria
                                             Crockeria chrysantha
                                     Cronquistianthus
                                     Croptilon
                                             Croptilon divaricatum
                                                   [Haplopappus divaricatus var. hookerianus]
                                                   [Haplopappus divaricatus]
                                                   [Inula divaricata]
                                                   [Isopappus divaricatus]
                                               Croptilon divaricatum var. graniticum
                                               Croptilon divaricatum var. hirtellum
                                               Croptilon divaricatum var. hookerianum
                                             Croptilon hookerianum
                                               Croptilon hookerianum var. graniticum
                                               Croptilon hookerianum var. hookerianum
                                               Croptilon hookerianum var. validum
                                             Croptilon rigidifolium
                                     Crossostephium
                                             Crossostephium insulare
                                     Crossothamnus
                                     Crupina
                                             Crupina vulgaris
                                               Crupina vulgaris var. brachypappa
                                               Crupina vulgaris var. vulgaris
                                     Cuatrecasanthus
                                     Cuatrecasasiella
                                     Cuchumatanea
                                     Culcitium
                                     Cuniculotinus
                                             Cuniculotinus gramineus
                                     Cupularia
                                             Cupularia viscosa
                                     Cyanopsis
                                             Cyanopsis muricata
                                     Cyanthillium
                                             Cyanthillium cinereum
                                     Cyathomone
                                     Cyclachaena
                                             Cyclachaena pedicellata
                                             Cyclachaena xanthiifolia
                                                   [Cyclachaena xanthifolia]
                                                   [Iva xanthifolia]
                                     Cyclolepis
                                             Cyclolepis genistoides
                                     Cymbia
                                             Cymbia occidentalis
                                     Cymophora
                                             Cymophora accedens
                                             Cymophora pringlei
                                     Cynara
                                             Cynara cardunculus
                                               Cynara cardunculus ssp. cardunculus
                                               Cynara cardunculus ssp. flavescens
                                             Cynara scolymus
                                     Cynthia
                                             Cynthia dandelion
                                             Cynthia montana
                                     Cyrtocymura
                                             Cyrtocymura harleyi
                                     Dahlia
                                             Dahlia apiculata
                                             Dahlia australis
                                             Dahlia coccinea
                                             Dahlia gentryi
                                             Dahlia imperialis
                                             Dahlia linearis
                                             Dahlia merckii
                                             Dahlia pinnata
                                             Dahlia rosea
                                             Dahlia rudis
                                             Dahlia rupicola
                                             Dahlia sherffii
                                             Dahlia tenuicaulis
                                             Dahlia variabilis
                                     Darwiniothamnus
                                     Dasycondylus
                                     Dasyphyllum
                                             Dasyphyllum brasiliense
                                             Dasyphyllum spinescens
                                             Dasyphyllum tomentosum
                                     Decachaeta
                                             Decachaeta haenkeana
                                             Decachaeta incompta
                                             Decachaeta ovatifolia
                                             Decachaeta scabrella
                                     Deinandra
                                             Deinandra arida
                                             Deinandra bacigalupii
                                             Deinandra clementina
                                             Deinandra conjugens
                                             Deinandra corymbosa
                                               Deinandra corymbosa ssp. corymbosa
                                               Deinandra corymbosa ssp. macrocephala
                                             Deinandra fasciculata
                                                   [Hemizonia fasciculata]
                                             Deinandra floribunda
                                             Deinandra halliana
                                             Deinandra increscens
                                               Deinandra increscens ssp. foliosa
                                               Deinandra increscens ssp. increscens
                                               Deinandra increscens ssp. villosa
                                             Deinandra kelloggii
                                                   [Hemizonia kelloggii]
                                             Deinandra lobbii
                                             Deinandra martirensis
                                             Deinandra minthornii
                                             Deinandra mohavensis
                                             Deinandra pallida
                                             Deinandra paniculata
                                                   [Hemizonia paniculata]
                                             Deinandra pentactis
                                             Deinandra simplex
                                             Deinandra streetsii
                                             Deinandra wrightii
                                     Delairea
                                             Delairea odorata
                                     Delilea
                                             Delilea biflora
                                     Delilia
                                             Delilia biflora
                                     Dendranthema
                                             Dendranthema coronarium
                                             Dendranthema hultenii
                                             Dendranthema indicum
                                                   [Chrysanthemum indicum]
                                             Dendranthema morifolium
                                     Dendrophorbium
                                     Dendroseris
                                     Desmanthodium
                                             Desmanthodium fruticosum
                                             Desmanthodium hintoniorum
                                             Desmanthodium hondurense
                                             Desmanthodium ovatum
                                             Desmanthodium perfoliatum
                                     Diaperia
                                             Diaperia candida
                                                   [Evax candida]
                                             Diaperia prolifera
                                                   [Evax prolifera]
                                                   [Filago nuttallii]
                                                   [Filago prolifera]
                                               Diaperia prolifera var. barnebyi
                                               Diaperia prolifera var. prolifera
                                             Diaperia verna
                                                   [Diaperia multicaulis]
                                                   [Evax multicaulis var. multicaulis]
                                                   [Evax multicaulis]
                                                   [Evax verna var. verna]
                                                   [Evax verna]
                                               Diaperia verna var. drummondii
                                                     [Diaperia drummondii]
                                                     [Evax multicaulis var. drummondii]
                                                     [Evax verna var. drummondii]
                                                     [Filaginopsis drummondii]
                                                     [Filago verna var. drummondii]
                                               Diaperia verna var. verna
                                     Dichaeta
                                             Dichaeta tenella
                                     Dichaetophora
                                             Dichaetophora campestris
                                     Dicoria
                                             Dicoria argentea
                                             Dicoria canescens
                                               Dicoria canescens ssp. brandegeei
                                                     [Dicoria brandegeei]
                                                     [Dicoria canescens var. brandegeei]
                                                     [Dicoria paniculata]
                                               Dicoria canescens ssp. canescens
                                                     [Dicoria oblongifolia]
                                               Dicoria canescens ssp. clarkiae
                                                     [Dicoria clarkiae]
                                               Dicoria canescens ssp. hispidula
                                               Dicoria canescens ssp. wetherillii
                                               Dicoria canescens var. hispidula
                                               Dicoria canescens var. wetherillii
                                             Dicoria clarkae
                                             Dicoria wetherillii
                                     Dicranocarpus
                                             Dicranocarpus parviflorus
                                     Digitacalia
                                             Digitacalia crypta
                                     Dillandia
                                     Dimeresia
                                             Dimeresia howellii
                                     Dimerostemma
                                     Dimorphotheca
                                             Dimorphotheca annua
                                             Dimorphotheca cuneata
                                             Dimorphotheca ecklonis
                                             Dimorphotheca pluvialis
                                             Dimorphotheca sinuata
                                     Dinoseris
                                     Diplactis
                                             Diplactis alpina
                                               Diplactis alpina ssp. vierhapperi
                                     Diplopappus
                                             Diplopappus ericoides
                                               Diplopappus ericoides var. hirtella
                                             Diplopappus lutescens
                                     Diplostelma
                                             Diplostelma bellioides
                                     Diplostephium
                                     Distasis
                                           [Dictyoloma]
                                     Dittrichia
                                             Dittrichia graveolens
                                                   [Inula graveolens]
                                             Dittrichia viscosa
                                     Doellingeria
                                             Doellingeria humilis
                                             Doellingeria infirma
                                             Doellingeria ptarmicoides
                                             Doellingeria reticulata
                                             Doellingeria scabra
                                             Doellingeria sericocarpoides
                                             Doellingeria umbellata
                                               Doellingeria umbellata ssp. pubens
                                               Doellingeria umbellata var. latifolia
                                               Doellingeria umbellata var. pubens
                                               Doellingeria umbellata var. umbellata
                                     Doniophyton
                                     Dorobaea
                                     Doronicum
                                           [Elachia]
                                             Doronicum acaule
                                             Doronicum austriacum
                                             Doronicum orientale
                                             Doronicum pardalianches
                                             Doronicum plantagineum
                                     Dracopis
                                     Dresslerothamnus
                                     Dubautia
                                             Dubautia arborea
                                             Dubautia ciliolata
                                               Dubautia ciliolata ssp. ciliolata
                                               Dubautia ciliolata ssp. glutinosa
                                               Dubautia ciliolata var. juniperoides
                                               Dubautia ciliolata var. trinervia
                                             Dubautia coriacea
                                             Dubautia dolosa
                                             Dubautia herbstobatae
                                             Dubautia hillebrandii
                                             Dubautia imbricata
                                               Dubautia imbricata ssp. acronaea
                                               Dubautia imbricata ssp. imbricata
                                             Dubautia kenwoodii
                                             Dubautia knudsenii
                                               Dubautia knudsenii ssp. filiformis
                                               Dubautia knudsenii ssp. knudsenii
                                               Dubautia knudsenii ssp. nagatae
                                               Dubautia knudsenii var. degeneri
                                             Dubautia kohalae
                                             Dubautia laevigata
                                               Dubautia laevigata var. parvifolia
                                             Dubautia latifolia
                                             Dubautia laxa
                                               Dubautia laxa ssp. bryanii
                                               Dubautia laxa ssp. hirsuta
                                               Dubautia laxa ssp. laxa
                                               Dubautia laxa ssp. pseudoplantaginea
                                               Dubautia laxa var. bryanii
                                               Dubautia laxa var. greenwelliae
                                               Dubautia laxa var. hirsuta
                                               Dubautia laxa var. hispida
                                               Dubautia laxa var. intercedens
                                               Dubautia laxa var. obovata
                                               Dubautia laxa var. pedicellata
                                               Dubautia laxa var. pseudoplantaginea
                                               Dubautia laxa var. skottsbergii
                                               Dubautia laxa var. waianensis
                                             Dubautia linearis
                                               Dubautia linearis ssp. hillebrandii
                                               Dubautia linearis ssp. linearis
                                               Dubautia linearis ssp. opposita
                                               Dubautia linearis var. opposita
                                             Dubautia lonchophylla
                                             Dubautia magnifolia
                                             Dubautia menziesii
                                               Dubautia menziesii var. angustifolia
                                             Dubautia microcephala
                                             Dubautia molokaiensis
                                               Dubautia molokaiensis var. oppositifolia
                                               Dubautia molokaiensis var. stipitata
                                             Dubautia montana
                                               Dubautia montana var. longifolia
                                               Dubautia montana var. robustior
                                             Dubautia nagatae
                                             Dubautia paleata
                                             Dubautia pauciflorula
                                             Dubautia plantaginea
                                               Dubautia plantaginea ssp. humilis
                                               Dubautia plantaginea ssp. magnifolia
                                               Dubautia plantaginea ssp. plantaginea
                                               Dubautia plantaginea var. acridentata
                                               Dubautia plantaginea var. glandulosa
                                               Dubautia plantaginea var. pauoaensis
                                               Dubautia plantaginea var. platyphylla
                                               Dubautia plantaginea var. strigosa
                                             Dubautia platyphylla
                                               Dubautia platyphylla var. leptophylla
                                             Dubautia raillardioides
                                             Dubautia reticulata
                                             Dubautia rockii
                                             Dubautia scabra
                                               Dubautia scabra ssp. leiophylla
                                               Dubautia scabra ssp. scabra
                                               Dubautia scabra var. leiophylla
                                               Dubautia scabra var. munroi
                                             Dubautia sherffiana
                                               Dubautia sherffiana var. paucinervia
                                             Dubautia struthioloides
                                             Dubautia syndetica
                                             Dubautia ternifolia
                                             Dubautia thyrsiflora
                                               Dubautia thyrsiflora var. cernua
                                             Dubautia waialealae
                                             Dubautia waianapanapaenis
                                             Dubautia x demissifolia
                                             Dubautia x fallax
                                             Dubautia x fucosa
                                             Dubautia x media
                                             Dubautia x mendacoides
                                             Dubautia x mendax
                                             Dubautia x molokaiensis
                                             Dubautia x montana
                                             Dubautia x paludicola
                                             Dubautia x thyrsiflora
                                     Dugaldia
                                             Dugaldia grandiflora
                                             Dugaldia integrifolia
                                     Dugesia
                                             Dugesia mexicana
                                     Dyscritothamnus
                                             Dyscritothamnus filifolius
                                     Dysodiopsis
                                             Dysodiopsis tagetoides
                                     Dysodium
                                             Dysodium divaricatum
                                     Dyssodia
                                             Dyssodia anthemidifolia
                                                   [Boeberastrum anthemidifolium]
                                             Dyssodia appendiculata
                                             Dyssodia aurantiaca
                                             Dyssodia berlandieri
                                             Dyssodia chrysanthemoides
                                             Dyssodia gentryi
                                             Dyssodia gypsophila
                                             Dyssodia littoralis
                                             Dyssodia micropoides
                                             Dyssodia papposa
                                                   [Boebera papposa]
                                                   [Tagetes papposa]
                                             Dyssodia pinnata
                                               Dyssodia pinnata var. glabrescens
                                             Dyssodia sanguinea
                                             Dyssodia speciosa
                                             Dyssodia squamosa
                                             Dyssodia tagetoides
                                             Dyssodia tenuifolia
                                             Dyssodia tenuiloba
                                               Dyssodia tenuiloba ssp. wrightii
                                               Dyssodia tenuiloba var. texana
                                               Dyssodia tenuiloba var. treculii
                                             Dyssodia tephroleuca
                                             Dyssodia texana
                                             Dyssodia treculii
                                             Dyssodia wrightii
                                     Eastwoodia
                                             Eastwoodia elegans
                                     Eatonella
                                             Eatonella congdonii
                                             Eatonella nivea
                                     Echinacea
                                             Echinacea angustifolia
                                               Echinacea angustifolia var. angustifolia
                                               Echinacea angustifolia var. strigosa
                                               Echinacea angustifolia var. tennesseensis
                                             Echinacea atrorubens
                                               Echinacea atrorubens var. neglecta
                                               Echinacea atrorubens var. paradoxa
                                             Echinacea laevigata
                                             Echinacea pallida
                                                   [Brauneria pallida]
                                                   [Rudbeckia pallida]
                                               Echinacea pallida var. angustifolia
                                               Echinacea pallida var. sanguinea
                                               Echinacea pallida var. strigosa
                                             Echinacea paradoxa
                                               Echinacea paradoxa var. neglecta
                                               Echinacea paradoxa var. paradoxa
                                             Echinacea purpurea
                                                   [Brauneria purpurea]
                                                   [Echinacea purpurea var. arkansana]
                                                   [Rudbeckia purpurea]
                                               Echinacea purpurea var. laevigata
                                             Echinacea sanguinea
                                             Echinacea simulata
                                             Echinacea tennesseensis
                                     Echinops
                                             Echinops bannaticus
                                             Echinops commutatus
                                             Echinops echinatus
                                             Echinops exaltatus
                                             Echinops fruticosus
                                             Echinops macrochaetus
                                             Echinops ritro
                                               Echinops ritro ssp. ruthenicus
                                             Echinops ruthenicus
                                             Echinops sphaerocephalus
                                     Eclipta
                                             Eclipta prostrata
                                                   [Eclipta alba]
                                                   [Eclipta erecta]
                                                   [Eclipta punctata]
                                                   [Verbesina alba]
                                                   [Verbesina prostrata]
                                     Egletes
                                             Egletes liebmannii
                                             Egletes prostrata
                                             Egletes viscosa
                                                   [Cotula viscosa]
                                     Eirmocephala
                                     Elaphandra
                                     Elephantopus
                                             Elephantopus angustifolius
                                             Elephantopus carolinianus
                                                   [Elephantopus flexuosus]
                                                   [Elephantopus violaceus]
                                               Elephantopus carolinianus var. simplex
                                             Elephantopus elatus
                                               Elephantopus elatus var. intermedius
                                             Elephantopus hypomalacus
                                             Elephantopus martii
                                             Elephantopus mollis
                                             Elephantopus nudatus
                                             Elephantopus nudicaulis
                                             Elephantopus pilosus
                                             Elephantopus scaber
                                             Elephantopus spicatus
                                             Elephantopus tomentosus
                                     Eleutheranthera
                                             Eleutheranthera ruderalis
                                     Ellenbergia
                                     Elvira
                                             Elvira biflora
                                     Emilia
                                             Emilia coccinea
                                             Emilia fosbergii
                                             Emilia javanica
                                             Emilia sonchifolia
                                               Emilia sonchifolia var. javanica
                                               Emilia sonchifolia var. sonchifolia
                                     Encelia
                                             Encelia actoni
                                                   [Encelia actonii]
                                                   [Encelia frutescens var. actoni]
                                                   [Encelia virginensis ssp. actoni]
                                                   [Encelia virginensis ssp. actonii]
                                                   [Encelia virginensis var. actoni]
                                                   [Encelia virginensis var. actonii]
                                             Encelia asperifolia
                                             Encelia californica
                                               Encelia californica var. asperifolia
                                             Encelia calva
                                             Encelia canescens
                                             Encelia conspersa
                                             Encelia densifolia
                                             Encelia farinosa
                                                   [Encelia farinosa var. radians]
                                               Encelia farinosa var. farinosa
                                               Encelia farinosa var. phenicodonta
                                             Encelia frutescens
                                               Encelia frutescens var. actonii
                                               Encelia frutescens var. frutescens
                                                     [Simsia frutescens]
                                             Encelia halimifolia
                                             Encelia laciniata
                                             Encelia mexicana
                                             Encelia nutans
                                                   [Enceliopsis nutans]
                                             Encelia oblongifolia
                                             Encelia palmeri
                                             Encelia ravenii
                                             Encelia resinifera
                                                   [Encelia frutescens var. resinosa]
                                               Encelia resinifera ssp. resinifera
                                               Encelia resinifera ssp. tenuifolia
                                                     [Encelia resinifera var. tenuifolia]
                                             Encelia scaposa
                                                   [Encelia scaposa var. stenophylla]
                                                   [Simsia scaposa]
                                             Encelia stenophylla
                                             Encelia ventorum
                                             Encelia virginensis
                                               Encelia virginensis var. virginensis
                                                     [Encelia frutescens var. virginensis]
                                     Enceliopsis
                                             Enceliopsis argophylla
                                                   [Tithonia argophylla]
                                             Enceliopsis covillei
                                                   [Enceliopsis argophylla var. grandiflora]
                                                   [Helianthella covillei]
                                             Enceliopsis nudicaulis
                                               Enceliopsis nudicaulis var. corrugata
                                               Enceliopsis nudicaulis var. nudicaulis
                                                     [Encelia nudicaulis]
                                     Endorima
                                             Endorima atropurpurea
                                             Endorima uniflora
                                     Engelmannia
                                             Engelmannia peristenia
                                                   [Engelmannia pinnatifida]
                                     Enydra
                                             Enydra sessilis
                                     Epaltes
                                             Epaltes australis
                                             Epaltes mexicana
                                     Erato
                                     Erechtites
                                             Erechtites arguta
                                             Erechtites glomerata
                                             Erechtites glomeratus
                                             Erechtites hieracifolia
                                             Erechtites hieraciifolia
                                               Erechtites hieraciifolia var. cacalioides
                                               Erechtites hieraciifolia var. hieraciifolia
                                               Erechtites hieraciifolia var. intermedia
                                               Erechtites hieraciifolia var. megalocarpa
                                               Erechtites hieraciifolia var. praealta
                                             Erechtites hieraciifolius
                                               Erechtites hieraciifolius var. hieraciifolius
                                             Erechtites megalocarpa
                                             Erechtites minima
                                             Erechtites minimus
                                             Erechtites prenanthoides
                                             Erechtites valerianifolia
                                     Eremanthus
                                             Eremanthus capitatus
                                             Eremanthus glomerulatus
                                             Eremanthus pannosus
                                             Eremanthus pohlii
                                     Eremonanus
                                             Eremonanus mohavensis
                                     Eremosis
                                     Ericameria
                                             Ericameria albida
                                                   [Chrysothamnus albidus]
                                             Ericameria arborescens
                                                   [Haplopappus arborescens]
                                                   [Linosyris arborescens]
                                             Ericameria arizonica
                                             Ericameria austrotexana
                                             Ericameria bloomeri
                                             Ericameria brachylepis
                                                   [Bigelovia brachylepis]
                                                   [Haplopappus propinquus]
                                             Ericameria cervina
                                                   [Haplopappus cervinus]
                                             Ericameria compacta
                                             Ericameria cooperi
                                                   [Haplopappus cooperi]
                                               Ericameria cooperi ssp. bajacalifornica
                                               Ericameria cooperi var. bajacalifornica
                                               Ericameria cooperi var. cooperi
                                             Ericameria crispa
                                                   [Haplopappus crispus]
                                             Ericameria cuneata
                                               Ericameria cuneata var. cuneata
                                                     [Haplopappus cuneatus]
                                               Ericameria cuneata var. macrocephala
                                               Ericameria cuneata var. spathulata
                                                     [Haplopappus cuneatus var. spathulatus]
                                             Ericameria discoidea
                                               Ericameria discoidea var. discoidea
                                               Ericameria discoidea var. linearis
                                             Ericameria eremobia
                                             Ericameria ericoides
                                               Ericameria ericoides var. pachylepis
                                             Ericameria fasciculata
                                             Ericameria gilmanii
                                             Ericameria greenei
                                             Ericameria juarezensis
                                             Ericameria laricifolia
                                                   [Haplopappus laricifolius]
                                             Ericameria lignumviridis
                                             Ericameria linearifolia
                                                   [Haplopappus linearifolius ssp. interior]
                                                   [Haplopappus linearifolius var. interior]
                                                   [Haplopappus linearifolius]
                                                   [Stenotopsis interior]
                                                   [Stenotopsis linearifolia var. interior]
                                                   [Stenotopsis linearifolia]
                                             Ericameria linearis
                                             Ericameria martirensis
                                             Ericameria microphylla
                                             Ericameria monactis
                                             Ericameria nana
                                                   [Haplopappus nanus]
                                             Ericameria nauseosa
                                                   [Chrysothamnus nauseosus ssp. uintahensis]
                                                   [Chrysothamnus nauseosus ssp. viscosus]
                                                   [Chrysothamnus nauseosus var. uintahensis]
                                                   [Chrysothamnus nauseosus]
                                               Ericameria nauseosa var. arenaria
                                                     [Chrysothamnus nauseosus ssp. arenarius]
                                                     [Chrysothamnus nauseosus var. arenarius]
                                               Ericameria nauseosa var. bernardina
                                               Ericameria nauseosa var. bigelovii
                                                     [Chrysothamnus nauseosus ssp. bigelovii]
                                                     [Chrysothamnus nauseosus var. bigelovii]
                                               Ericameria nauseosa var. graveolens
                                                     [Chrysothamnus graveolens]
                                                     [Chrysothamnus nauseosus ssp. graveolens]
                                                     [Chrysothamnus nauseosus var. glabratus]
                                                     [Chrysothamnus nauseosus var. graveolens]
                                                     [Chrysothamnus nauseosus var. petrophilus]
                                                     [Ericameria nauseosa var. glabrata]
                                               Ericameria nauseosa var. hololeuca
                                                     [Chrysothamnus nauseosus ssp. gnaphalodes]
                                                     [Chrysothamnus nauseosus ssp. hololeucus]
                                                     [Chrysothamnus nauseosus var. gnaphalodes]
                                                     [Chrysothamnus nauseosus var. hololeucus]
                                               Ericameria nauseosa var. iridis
                                               Ericameria nauseosa var. juncea
                                                     [Chrysothamnus nauseosus ssp. junceus]
                                                     [Chrysothamnus nauseosus var. junceus]
                                               Ericameria nauseosa var. latisquamea
                                                     [Chrysothamnus nauseosus ssp. latisquameus]
                                                     [Chrysothamnus nauseosus var. latisquameus]
                                               Ericameria nauseosa var. leiosperma
                                                     [Chrysothamnus nauseosus ssp. leiospermus]
                                                     [Chrysothamnus nauseosus var. abbreviatus]
                                                     [Chrysothamnus nauseosus var. leiospermus]
                                               Ericameria nauseosa var. mohavensis
                                               Ericameria nauseosa var. nana
                                               Ericameria nauseosa var. nauseosa
                                                     [Chrysothamnus frigidus]
                                                     [Chrysothamnus nauseosus ssp. albicaulis]
                                                     [Chrysothamnus nauseosus ssp. bernardinus]
                                                     [Chrysothamnus nauseosus ssp. iridis]
                                                     [Chrysothamnus nauseosus ssp. nanus]
                                                     [Chrysothamnus nauseosus ssp. psilocarpus]
                                                     [Chrysothamnus nauseosus ssp. salicifolius]
                                                     [Chrysothamnus nauseosus ssp. speciosus]
                                                     [Chrysothamnus nauseosus ssp. texensis]
                                                     [Chrysothamnus nauseosus ssp. washoensis]
                                                     [Chrysothamnus nauseosus var. albicaulis]
                                                     [Chrysothamnus nauseosus var. glareosus]
                                                     [Chrysothamnus nauseosus var. iridis]
                                                     [Chrysothamnus nauseosus var. nanus]
                                                     [Chrysothamnus nauseosus var. nauseosus]
                                                     [Chrysothamnus nauseosus var. psilocarpus]
                                                     [Chrysothamnus nauseosus var. salicifolius]
                                                     [Chrysothamnus nauseosus var. speciosus]
                                                     [Chrysothamnus nauseosus var. typicus]
                                                     [Chrysothamnus nauseosus var. washoensis]
                                                     [Ericameria nauseosa ssp. nauseosa]
                                               Ericameria nauseosa var. nitida
                                                     [Chrysothamnus nauseosus ssp. nitidus]
                                                     [Chrysothamnus nauseosus var. nitidus]
                                               Ericameria nauseosa var. oreophila
                                                     [Chrysothamnus nauseosus ssp. ceruminosus]
                                                     [Chrysothamnus nauseosus ssp. consimilis]
                                                     [Chrysothamnus nauseosus ssp. mohavensis]
                                                     [Chrysothamnus nauseosus ssp. pinifolius]
                                                     [Chrysothamnus nauseosus var. artus]
                                                     [Chrysothamnus nauseosus var. consimilis]
                                                     [Chrysothamnus nauseosus var. mohavensis]
                                                     [Chrysothamnus nauseosus var. oreophilus]
                                                     [Ericameria nauseosa ssp. consimilis]
                                                     [Ericameria nauseosa var. arta]
                                               Ericameria nauseosa var. psilocarpa
                                               Ericameria nauseosa var. salicifolia
                                               Ericameria nauseosa var. speciosa
                                               Ericameria nauseosa var. texensis
                                               Ericameria nauseosa var. turbinata
                                                     [Chrysothamnus nauseosus ssp. turbinatus]
                                                     [Chrysothamnus nauseosus var. turbinatus]
                                               Ericameria nauseosa var. washoensis
                                               Ericameria nauseosa var. ceruminosa
                                             Ericameria obovata
                                             Ericameria ophitidis
                                             Ericameria palmeri
                                               Ericameria palmeri var. pachylepis
                                               Ericameria palmeri var. palmeri
                                             Ericameria paniculata
                                                   [Chrysothamnus paniculatus]
                                             Ericameria parishii
                                               Ericameria parishii var. parishii
                                             Ericameria parrasana
                                             Ericameria parryi
                                               Ericameria parryi var. affinis
                                               Ericameria parryi var. aspra
                                               Ericameria parryi var. attenuata
                                                     [Chrysothamnus parryi ssp. attenuatus]
                                                     [Chrysothamnus parryi var. attenuatus]
                                               Ericameria parryi var. howardii
                                                     [Chrysothamnus howardii]
                                                     [Chrysothamnus parryi ssp. howardii]
                                                     [Chrysothamnus parryi var. howardii]
                                               Ericameria parryi var. imula
                                               Ericameria parryi var. latior
                                               Ericameria parryi var. monocephala
                                               Ericameria parryi var. montana
                                               Ericameria parryi var. nevadensis
                                                     [Chrysothamnus parryi ssp. nevadensis]
                                                     [Chrysothamnus parryi var. nevadensis]
                                               Ericameria parryi var. parryi
                                                     [Chrysothamnus parryi ssp. affinis]
                                                     [Chrysothamnus parryi ssp. asper]
                                                     [Chrysothamnus parryi ssp. imulus]
                                                     [Chrysothamnus parryi ssp. latior]
                                                     [Chrysothamnus parryi ssp. monocephalus]
                                                     [Chrysothamnus parryi ssp. montanus]
                                                     [Chrysothamnus parryi ssp. salmonensis]
                                                     [Chrysothamnus parryi ssp. typicus]
                                                     [Chrysothamnus parryi var. affinis]
                                                     [Chrysothamnus parryi var. asper]
                                                     [Chrysothamnus parryi var. monocephalus]
                                                     [Chrysothamnus parryi var. parryi]
                                                     [Chrysothamnus parryi]
                                               Ericameria parryi var. salmonensis
                                               Ericameria parryi var. vulcanica
                                                     [Chrysothamnus parryi ssp. vulcanicus]
                                                     [Chrysothamnus parryi var. vulcanicus]
                                               Ericameria parryi var. aspera
                                             Ericameria pinifolia
                                                   [Haplopappus pinifolius]
                                             Ericameria purpusii
                                             Ericameria resinosa
                                             Ericameria suffruticosa
                                                   [Haplopappus suffruticosus]
                                                   [Macronema suffruticosum]
                                             Ericameria teretifolia
                                                   [Chrysothamnus teretifolius]
                                             Ericameria watsonii
                                                   [Haplopappus watsonii]
                                                   [Macronema watsonii]
                                             Ericameria winwardii
                                             Ericameria x bolanderi
                                             Ericameria x uintahensis
                                             Ericameria x viscosa
                                             Ericameria zionis
                                                   [Haplopappus zionis]
                                     Ericentrodea
                                     Erigeron
                                             Erigeron abajoensis
                                             Erigeron acomanus
                                             Erigeron acris
                                               Erigeron acris ssp. debilis
                                               Erigeron acris ssp. decoloratus
                                               Erigeron acris ssp. droebachiensis
                                               Erigeron acris ssp. kamtschaticus
                                               Erigeron acris ssp. politus
                                               Erigeron acris var. asteroides
                                               Erigeron acris var. debilis
                                               Erigeron acris var. elatus
                                               Erigeron acris var. kamtschaticus
                                             Erigeron aequifolius
                                             Erigeron affinis
                                             Erigeron alamosanus
                                             Erigeron alaskanus
                                             Erigeron alcicornutus
                                             Erigeron algidus
                                             Erigeron aliceae
                                             Erigeron allocotus
                                             Erigeron alpiniformis
                                             Erigeron alpinus
                                               Erigeron alpinus ssp. intermedius
                                               Erigeron alpinus var. elatus
                                             Erigeron amplifolius
                                             Erigeron anchana
                                             Erigeron andersonii
                                             Erigeron angulosus
                                               Erigeron angulosus ssp. debilis
                                             Erigeron angustatus
                                             Erigeron annuus
                                                   [Erigeron annuus var. discoideus]
                                                   [Stenactis annua]
                                               Erigeron annuus ssp. strigosus
                                             Erigeron anodonta
                                             Erigeron aphanactis
                                               Erigeron aphanactis var. aphanactis
                                                     [Erigeron concinnus var. aphanactis]
                                               Erigeron aphanactis var. congestus
                                             Erigeron arenarioides
                                                   [Aster arenarioides]
                                             Erigeron arenarius
                                             Erigeron argentatus
                                             Erigeron arisolius
                                             Erigeron arizonicus
                                                   [Erigeron rusbyi]
                                             Erigeron asper
                                             Erigeron asperugineus
                                             Erigeron asperum
                                               Erigeron asperum var. pubescens
                                             Erigeron atticus
                                             Erigeron aurantiacus
                                             Erigeron aureus
                                               Erigeron aureus var. aureus
                                             Erigeron austinae
                                             Erigeron austiniae
                                             Erigeron awapensis
                                             Erigeron barbarensis
                                             Erigeron barbellulatus
                                             Erigeron basalticus
                                             Erigeron basaseachensis
                                             Erigeron basilobatus
                                             Erigeron bellidiastrum
                                               Erigeron bellidiastrum var. arenarius
                                               Erigeron bellidiastrum var. bellidiastrum
                                               Erigeron bellidiastrum var. robustus
                                             Erigeron bellidifolius
                                             Erigeron bellioides
                                             Erigeron bigelovii
                                             Erigeron bilboanus
                                             Erigeron biolettii
                                             Erigeron bistiensis
                                             Erigeron blepharophyllus
                                             Erigeron blochmaniae
                                             Erigeron bloomeri
                                               Erigeron bloomeri var. bloomeri
                                               Erigeron bloomeri var. nudatus
                                               Erigeron bloomeri var. pubens
                                               Erigeron bloomeri var. typicus
                                             Erigeron borealis
                                             Erigeron breweri
                                               Erigeron breweri var. bisanctus
                                               Erigeron breweri var. breweri
                                               Erigeron breweri var. covillei
                                               Erigeron breweri var. elmeri
                                               Erigeron breweri var. jacinteus
                                               Erigeron breweri var. klamathensis
                                               Erigeron breweri var. porphyreticus
                                             Erigeron byei
                                             Erigeron caespitosus
                                                   [Erigeron caespitosus var. laccoliticus]
                                               Erigeron caespitosus var. nauseosus
                                             Erigeron calcicola
                                             Erigeron californicus
                                             Erigeron calvus
                                             Erigeron canaani
                                             Erigeron candidus
                                             Erigeron canus
                                             Erigeron carringtoniae
                                             Erigeron cascadensis
                                             Erigeron caucasicus
                                               Erigeron caucasicus ssp. venustus
                                             Erigeron caulinifolius
                                             Erigeron cavernensis
                                             Erigeron cervinus
                                             Erigeron chiangii
                                               Erigeron chiangii var. lamprocaulis
                                             Erigeron chrysopsidis
                                               Erigeron chrysopsidis ssp. austinae
                                               Erigeron chrysopsidis var. austiniae
                                               Erigeron chrysopsidis var. brevifolius
                                               Erigeron chrysopsidis var. chrysopsidis
                                             Erigeron cinereus
                                             Erigeron clokeyi
                                               Erigeron clokeyi var. clokeyi
                                               Erigeron clokeyi var. pinzliae
                                             Erigeron compactus
                                             Erigeron compositus
                                                   [Erigeron compositus var. discoideus]
                                                   [Erigeron compositus var. glabratus]
                                                   [Erigeron compositus var. multifidus]
                                                   [Erigeron compositus var. typicus]
                                             Erigeron concinnus
                                               Erigeron concinnus var. concinnus
                                                     [Distasis concinna]
                                                     [Erigeron brandegeei]
                                                     [Erigeron pumilus ssp. concinnoides]
                                                     [Erigeron pumilus var. concinnus]
                                                     [Erigeron pumilus var. euconcinnoides]
                                               Erigeron concinnus var. condensatus
                                                     [Erigeron condensatus]
                                                     [Erigeron pumilus var. condensatus]
                                               Erigeron concinnus var. subglaber
                                                     [Erigeron perglaber]
                                                     [Erigeron pumilus var. subglaber]
                                             Erigeron congestus
                                             Erigeron consimilis
                                                   [Erigeron compactus var. consimilis]
                                             Erigeron conspicuus
                                             Erigeron copelandi
                                             Erigeron coronarius
                                             Erigeron coroniglandifer
                                             Erigeron corymbosus
                                             Erigeron coulteri
                                             Erigeron cronquistii
                                             Erigeron cuatrocienegensis
                                             Erigeron cuneifolius
                                             Erigeron davisii
                                             Erigeron debilis
                                             Erigeron decumbens
                                               Erigeron decumbens ssp. robustior
                                               Erigeron decumbens var. decumbens
                                               Erigeron decumbens var. robustior
                                             Erigeron delicatus
                                             Erigeron delphinifolius
                                               Erigeron delphinifolius ssp. neomexicanus
                                             Erigeron denalii
                                             Erigeron deustus
                                             Erigeron disparipilus
                                             Erigeron divergens
                                                   [Erigeron divergens var. typicus]
                                               Erigeron divergens var. divergens
                                             Erigeron droebachensis
                                             Erigeron dryophyllus
                                             Erigeron earlei
                                             Erigeron eatoni
                                             Erigeron eatonii
                                               Erigeron eatonii ssp. plantagineus
                                               Erigeron eatonii ssp. villosus
                                               Erigeron eatonii var. eatonii
                                                     [Erigeron eatonii ssp. typicus]
                                               Erigeron eatonii var. lavandulus
                                               Erigeron eatonii var. nevadincola
                                                     [Erigeron nevadincola]
                                               Erigeron eatonii var. plantagineus
                                               Erigeron eatonii var. sonnei
                                               Erigeron eatonii var. villosus
                                             Erigeron elatior
                                                   [Erigeron grandiflorus var. elatior]
                                             Erigeron elatus
                                               Erigeron elatus var. oligocephalus
                                             Erigeron elegantulus
                                             Erigeron elmeri
                                             Erigeron elongatus
                                             Erigeron engelmannii
                                               Erigeron engelmannii ssp. davisii
                                               Erigeron engelmannii ssp. typicus
                                               Erigeron engelmannii var. davisii
                                               Erigeron engelmannii var. engelmannii
                                             Erigeron eruptens
                                             Erigeron evermannii
                                             Erigeron eximius
                                                   [Erigeron superbus]
                                             Erigeron filifolius
                                               Erigeron filifolius var. filifolius
                                               Erigeron filifolius var. robustior
                                               Erigeron filifolius var. typicus
                                             Erigeron flabellifolius
                                             Erigeron flagellaris
                                                   [Erigeron flagellaris var. typicus]
                                                   [Erigeron nudiflorus]
                                               Erigeron flagellaris var. trilobatus
                                             Erigeron flettii
                                             Erigeron flexuosus
                                             Erigeron floribundus
                                             Erigeron foliosus
                                               Erigeron foliosus var. blochmaniae
                                               Erigeron foliosus var. confinis
                                               Erigeron foliosus var. covillei
                                               Erigeron foliosus var. foliosus
                                               Erigeron foliosus var. franciscensis
                                               Erigeron foliosus var. hartwegii
                                               Erigeron foliosus var. mendocinus
                                               Erigeron foliosus var. stenophyllus
                                             Erigeron formosissimus
                                               Erigeron formosissimus var. formosissimus
                                                     [Erigeron formosissimus var. typicus]
                                               Erigeron formosissimus var. viscidus
                                                     [Erigeron glabellus var. viscidus]
                                                     [Erigeron viscidus]
                                             Erigeron forreri
                                             Erigeron fragilis
                                             Erigeron fraternus
                                               Erigeron fraternus var. fraternus
                                             Erigeron fruticetorum
                                             Erigeron fundus
                                             Erigeron galeottii
                                             Erigeron garrettii
                                                   [Erigeron controversus]
                                             Erigeron gaudinii
                                             Erigeron geiseri
                                             Erigeron gilliesii
                                             Erigeron glabellus
                                               Erigeron glabellus ssp. pubescens
                                               Erigeron glabellus ssp. typicus
                                               Erigeron glabellus var. glabellus
                                               Erigeron glabellus var. mollis
                                               Erigeron glabellus var. pubescens
                                               Erigeron glabellus var. yukonensis
                                             Erigeron glabratus
                                             Erigeron glacialis
                                               Erigeron glacialis var. glacialis
                                               Erigeron glacialis var. hirsutus
                                             Erigeron glaucus
                                             Erigeron goodrichii
                                             Erigeron gracilis
                                             Erigeron grandiflorus
                                               Erigeron grandiflorus ssp. arcticus
                                               Erigeron grandiflorus ssp. grandiflorus
                                               Erigeron grandiflorus ssp. muirii
                                             Erigeron greenei
                                             Erigeron griseus
                                             Erigeron gypsophilus
                                             Erigeron hartwegi
                                             Erigeron heliographis
                                             Erigeron hessii
                                             Erigeron higginsii
                                             Erigeron howellii
                                             Erigeron huberi
                                             Erigeron hultenii
                                             Erigeron humilis
                                             Erigeron hyperboreus
                                             Erigeron hyssopifolius
                                               Erigeron hyssopifolius var. hyssopifolius
                                             Erigeron incanescens
                                             Erigeron inoptatus
                                             Erigeron inornatus
                                               Erigeron inornatus var. angustatus
                                               Erigeron inornatus var. biolettii
                                               Erigeron inornatus var. calidipetris
                                               Erigeron inornatus var. inornatus
                                               Erigeron inornatus var. keilii
                                               Erigeron inornatus var. reductus
                                               Erigeron inornatus var. viscidulus
                                             Erigeron jacinteus
                                             Erigeron jamaicensis
                                             Erigeron janivultus
                                             Erigeron jenkinsii
                                             Erigeron jonesii
                                             Erigeron jucundus
                                             Erigeron kachinensis
                                             Erigeron kamtschaticus
                                             Erigeron karvinskianus
                                             Erigeron klamathensis
                                             Erigeron kuschei
                                             Erigeron lackschewitzii
                                             Erigeron lanatus
                                             Erigeron lassenianus
                                               Erigeron lassenianus var. deficiens
                                               Erigeron lassenianus var. lassenianus
                                             Erigeron latus
                                             Erigeron leibergii
                                             Erigeron leiomerus
                                             Erigeron lemmonii
                                             Erigeron lepidopodus
                                             Erigeron linearis
                                                   [Erigeron peucephyllus]
                                               Erigeron linearis var. elegantulus
                                             Erigeron lobatus
                                             Erigeron lonchophyllus
                                                   [Erigeron lonchophyllus var. laurentianus]
                                                   [Erigeron minor]
                                                   [Trimorpha lonchophylla]
                                             Erigeron longipes
                                             Erigeron luteus
                                             Erigeron maguirei
                                               Erigeron maguirei var. harrisonii
                                             Erigeron mancus
                                             Erigeron maniopotamicus
                                             Erigeron mariposanus
                                             Erigeron maximus
                                             Erigeron mayoensis
                                             Erigeron melanocephalus
                                                   [Erigeron uniflorus var. melanocephalus]
                                             Erigeron mendocinus
                                             Erigeron metrius
                                             Erigeron mexiae
                                             Erigeron miser
                                             Erigeron modestus
                                                   [Erigeron lobatus var. warnockii]
                                                   [Erigeron plateauensis]
                                                   [Erigeron warnockii]
                                             Erigeron mohinorensis
                                             Erigeron mucronatum
                                             Erigeron mucronatus
                                             Erigeron muirii
                                             Erigeron multiceps
                                             Erigeron multiradiatus
                                             Erigeron myosotis
                                             Erigeron nanus
                                             Erigeron naudinii
                                             Erigeron nauseosus
                                             Erigeron nematophylloides
                                             Erigeron nematophyllus
                                             Erigeron neomexicanus
                                                   [Erigeron delphiniifolius ssp. neomexicanus]
                                                   [Erigeron delphiniifolius var. euneomexicanus]
                                             Erigeron nevadensis
                                               Erigeron nevadensis var. sonnei
                                             Erigeron nitens
                                             Erigeron nivalis
                                             Erigeron oblanceolatus
                                             Erigeron ochroleucus
                                               Erigeron ochroleucus var. ochroleucus
                                               Erigeron ochroleucus var. scribneri
                                             Erigeron oligodontus
                                             Erigeron oreganus
                                             Erigeron oreophilus
                                                   [Erigeron delphiniifolius var. oreophilus]
                                               Erigeron oreophilus var. dactyloides
                                             Erigeron orientalis
                                             Erigeron ovinus
                                             Erigeron oxyodontus
                                             Erigeron oxyphyllus
                                             Erigeron pallens
                                             Erigeron parishii
                                             Erigeron parryi
                                             Erigeron paucipetalus
                                             Erigeron peasei
                                             Erigeron pecosensis
                                             Erigeron peregrinus
                                               Erigeron peregrinus ssp. callianthemus
                                                     [Erigeron callianthemus]
                                                     [Erigeron peregrinus var. angustifolius]
                                                     [Erigeron peregrinus var. eucallianthemus]
                                                     [Erigeron peregrinus var. scaposus]
                                               Erigeron peregrinus ssp. peregrinus
                                               Erigeron peregrinus var. callianthemus
                                               Erigeron peregrinus var. hirsutus
                                               Erigeron peregrinus var. peregrinus
                                               Erigeron peregrinus var. thompsonii
                                             Erigeron petiolaris
                                             Erigeron petrophilus
                                               Erigeron petrophilus var. petrophilus
                                               Erigeron petrophilus var. sierrensis
                                               Erigeron petrophilus var. viscidulus
                                             Erigeron philadelphicus
                                               Erigeron philadelphicus ssp. provancheri
                                               Erigeron philadelphicus var. glaber
                                               Erigeron philadelphicus var. philadelphicus
                                               Erigeron philadelphicus var. provancheri
                                               Erigeron philadelphicus var. scaturicola
                                             Erigeron pinkavii
                                             Erigeron pinnatisectus
                                                   [Erigeron compositus var. pinnatisectus]
                                             Erigeron piperianus
                                             Erigeron piscaticus
                                             Erigeron podophyllus
                                             Erigeron poliospermus
                                               Erigeron poliospermus var. cereus
                                               Erigeron poliospermus var. disciformis
                                               Erigeron poliospermus var. poliospermus
                                               Erigeron poliospermus var. typicus
                                             Erigeron politus
                                             Erigeron polycephalus
                                             Erigeron polymorphus
                                             Erigeron porsildii
                                             Erigeron potosinus
                                             Erigeron pringlei
                                             Erigeron procumbens
                                                   [Aster procumbens]
                                                   [Erigeron myrionactis]
                                                   [Erigeron repens]
                                             Erigeron proselyticus
                                             Erigeron provancheri
                                             Erigeron pubescens
                                             Erigeron pulchellus
                                               Erigeron pulchellus var. brauniae
                                               Erigeron pulchellus var. pulchellus
                                               Erigeron pulchellus var. tolsteadii
                                             Erigeron pulcherrimus
                                                   [Erigeron pulcherrimus var. wyomingia]
                                                   [Erigeron wyomingia]
                                             Erigeron pulvinatus
                                             Erigeron pumilus
                                               Erigeron pumilus ssp. intermedius
                                                     [Erigeron pumilus var. euintermedius]
                                               Erigeron pumilus var. intermedius
                                               Erigeron pumilus var. pumilus
                                                     [Erigeron pumilus ssp. pumilus]
                                               Erigeron pumilus var. gracilior
                                             Erigeron purpuratus
                                               Erigeron purpuratus ssp. pallens
                                               Erigeron purpuratus var. purpuratus
                                             Erigeron purpureus
                                             Erigeron pygmaeus
                                             Erigeron quercifolius
                                             Erigeron quiexobrensis
                                             Erigeron radicatus
                                             Erigeron ramosus
                                             Erigeron reductus
                                               Erigeron reductus var. angustatus
                                               Erigeron reductus var. reductus
                                             Erigeron reinana
                                             Erigeron religiosus
                                             Erigeron rhizomactis
                                             Erigeron rhizomatus
                                             Erigeron robustior
                                             Erigeron roylei
                                             Erigeron rybius
                                             Erigeron rydbergii
                                             Erigeron salicinus
                                             Erigeron salishii
                                             Erigeron salmonensis
                                             Erigeron salsuginosus
                                               Erigeron salsuginosus var. angustifolius
                                             Erigeron sanctarum
                                             Erigeron saxatilis
                                             Erigeron scaposus
                                             Erigeron sceptrifer
                                             Erigeron scopulinus
                                             Erigeron scotteri
                                             Erigeron seemannii
                                             Erigeron serpentinus
                                             Erigeron simplex
                                             Erigeron simulans
                                             Erigeron sionis
                                               Erigeron sionis var. sionis
                                               Erigeron sionis var. trilobatus
                                             Erigeron sivinskii
                                             Erigeron smithii
                                             Erigeron socorrensis
                                             Erigeron sonnei
                                             Erigeron sparsifolius
                                             Erigeron speciosus
                                                   [Erigeron macranthus]
                                                   [Erigeron speciosus var. macranthus]
                                               Erigeron speciosus var. conspicuus
                                               Erigeron speciosus var. mollis
                                               Erigeron speciosus var. speciosus
                                               Erigeron speciosus var. typicus
                                               Erigeron speciosus var. uintahensis
                                             Erigeron stanfordii
                                             Erigeron stenophyllus
                                             Erigeron striatus
                                             Erigeron strigosus
                                               Erigeron strigosus ssp. septentrionalis
                                               Erigeron strigosus var. beyrichii
                                                     [Erigeron ramosus var. beyrichii]
                                               Erigeron strigosus var. calcicola
                                               Erigeron strigosus var. discoideus
                                               Erigeron strigosus var. dolomiticola
                                               Erigeron strigosus var. eligulatus
                                               Erigeron strigosus var. septentrionalis
                                               Erigeron strigosus var. strigosus
                                               Erigeron strigosus var. typicus
                                             Erigeron strigulosus
                                             Erigeron subglaber
                                             Erigeron subtrinervis
                                               Erigeron subtrinervis ssp. conspicuus
                                               Erigeron subtrinervis ssp. typicus
                                               Erigeron subtrinervis var. conspicuus
                                               Erigeron subtrinervis var. subtrinervis
                                             Erigeron supplex
                                             Erigeron tenellus
                                             Erigeron tener
                                             Erigeron tenuis
                                             Erigeron tephrodes
                                             Erigeron thunbergii
                                               Erigeron thunbergii ssp. glabratus
                                               Erigeron thunbergii var. glabratus
                                             Erigeron tracyi
                                                   [Erigeron colomexicanus]
                                                   [Erigeron divergens var. cinereus]
                                             Erigeron traversii
                                             Erigeron trifidus
                                             Erigeron tweediei
                                             Erigeron tweedyi
                                             Erigeron uintahensis
                                             Erigeron unalaschkensis
                                             Erigeron uncialis
                                               Erigeron uncialis ssp. conjugans
                                               Erigeron uncialis ssp. uncialis
                                               Erigeron uncialis var. conjugans
                                               Erigeron uncialis var. uncialis
                                             Erigeron unguiphyllus
                                             Erigeron uniflorus
                                               Erigeron uniflorus var. eriocephalus
                                                     [Erigeron uniflorus ssp. eriocephalus]
                                               Erigeron uniflorus var. unalaschkensis
                                             Erigeron untermannii
                                             Erigeron ursinus
                                               Erigeron ursinus var. ursinus
                                             Erigeron utahensis
                                               Erigeron utahensis var. sparsifolius
                                               Erigeron utahensis var. utahensis
                                                     [Erigeron utahensis var. tetrapleuris]
                                             Erigeron vagus
                                               Erigeron vagus var. madsenii
                                             Erigeron velutipes
                                             Erigeron venustus
                                             Erigeron vernus
                                             Erigeron versicolor
                                                   [Achaetogeron chihuahuensis]
                                                   [Achaetogeron versicolor]
                                                   [Erigeron geiseri var. calcicola]
                                                   [Erigeron gilensis]
                                                   [Erigeron mimegletes]
                                             Erigeron vetensis
                                                   [Erigeron glandulosus]
                                             Erigeron vicinus
                                             Erigeron villarsii
                                             Erigeron vreelandii
                                                   [Erigeron platyphyllus]
                                             Erigeron wahwahensis
                                             Erigeron watsonii
                                             Erigeron wilkenii
                                             Erigeron wislizeni
                                             Erigeron x arthurii
                                             Erigeron yukonensis
                                             Erigeron zothecinus
                                     Eriocarpum
                                             Eriocarpum coloradoense
                                             Eriocarpum megacephalum
                                             Eriocarpum serratum
                                             Eriocarpum stenolobum
                                     Eriophyllum
                                             Eriophyllum ambiguum
                                               Eriophyllum ambiguum var. ambiguum
                                               Eriophyllum ambiguum var. paleaceum
                                             Eriophyllum aureum
                                             Eriophyllum biternatum
                                             Eriophyllum bolanderi
                                             Eriophyllum brachylepis
                                             Eriophyllum caespitosum
                                             Eriophyllum cheiranthoides
                                             Eriophyllum chrysanthum
                                             Eriophyllum cineraria
                                             Eriophyllum confertiflorum
                                               Eriophyllum confertiflorum var. confertiflorum
                                               Eriophyllum confertiflorum var. discoideum
                                               Eriophyllum confertiflorum var. latum
                                               Eriophyllum confertiflorum var. laxiflorum
                                               Eriophyllum confertiflorum var. tanacetiflorum
                                               Eriophyllum confertiflorum var. tridactylum
                                               Eriophyllum confertiflorum var. trifidum
                                             Eriophyllum congdonii
                                             Eriophyllum croceum
                                             Eriophyllum gracile
                                             Eriophyllum greenei
                                             Eriophyllum jepsonii
                                             Eriophyllum lanatum
                                               Eriophyllum lanatum var. achillaeoides
                                               Eriophyllum lanatum var. achilleoides
                                               Eriophyllum lanatum var. achillioides
                                               Eriophyllum lanatum var. aphanactis
                                               Eriophyllum lanatum var. arachnoideum
                                               Eriophyllum lanatum var. croceum
                                               Eriophyllum lanatum var. cuneatum
                                               Eriophyllum lanatum var. grandiflorum
                                               Eriophyllum lanatum var. hallii
                                               Eriophyllum lanatum var. integrifolium
                                                     [Eriophyllum integrifolium]
                                                     [Eriophyllum lanatum var. monoense]
                                               Eriophyllum lanatum var. lanatum
                                               Eriophyllum lanatum var. lanceolatum
                                               Eriophyllum lanatum var. leucophyllum
                                               Eriophyllum lanatum var. obovatum
                                               Eriophyllum lanatum var. typicum
                                             Eriophyllum lanosum
                                                   [Antheropeas lanosum]
                                             Eriophyllum latilobum
                                             Eriophyllum lutescens
                                             Eriophyllum mohavense
                                             Eriophyllum multicaule
                                             Eriophyllum nevadense
                                             Eriophyllum nevinii
                                             Eriophyllum nubigenum
                                               Eriophyllum nubigenum var. congdonii
                                             Eriophyllum obovatum
                                             Eriophyllum paleaceum
                                             Eriophyllum pringlei
                                                   [Actinolepis nivea]
                                                   [Eriophyllum multicaule var. pringlei]
                                             Eriophyllum staechadifolium
                                               Eriophyllum staechadifolium var. depressum
                                             Eriophyllum stoechadifolium
                                               Eriophyllum stoechadifolium var. artemisiifolium
                                               Eriophyllum stoechadifolium var. depressum
                                             Eriophyllum tanacetiflorum
                                             Eriophyllum trichocarpum
                                             Eriophyllum tridactylum
                                             Eriophyllum wallacei
                                                   [Antheropeas wallacei]
                                                   [Bahia wallacei]
                                                   [Eriophyllum wallacei ssp. australe]
                                                   [Eriophyllum wallacei var. calvescens]
                                                   [Eriophyllum wallacei var. rubellum]
                                             Eriophyllum watsonii
                                     Erlangea
                                     Erythremia
                                     Eschenbachia
                                     Espejoa
                                     Espeletia
                                             Espeletia schultzii
                                     Ethulia
                                     Eucephalus
                                             Eucephalus bicolor
                                             Eucephalus breweri
                                             Eucephalus brickellioides
                                             Eucephalus covillei
                                             Eucephalus elegans
                                                   [Aster elegans]
                                                   [Aster perelegans]
                                                   [Eucephalus perelegans]
                                             Eucephalus engelmannii
                                             Eucephalus glabratus
                                             Eucephalus glandulosus
                                             Eucephalus glaucescens
                                             Eucephalus gormanii
                                             Eucephalus ledophyllus
                                               Eucephalus ledophyllus var. covillei
                                               Eucephalus ledophyllus var. ledophyllus
                                             Eucephalus paucicapitatus
                                             Eucephalus tomentellus
                                             Eucephalus vialis
                                     Euchiton
                                             Euchiton gymnocephalus
                                             Euchiton involucratus
                                             Euchiton japonicus
                                             Euchiton sphaericus
                                     Eupatoriadelphus
                                             Eupatoriadelphus dubius
                                             Eupatoriadelphus fistulosus
                                             Eupatoriadelphus maculatus
                                               Eupatoriadelphus maculatus var. foliosum
                                               Eupatoriadelphus maculatus var. maculatus
                                                     [Eupatorium maculatum var. maculatum]
                                                     [Eupatorium purpureum var. maculatum]
                                             Eupatoriadelphus purpureus
                                     Eupatoriastrum
                                             Eupatoriastrum triangulare
                                     Eupatorium
                                             Eupatorium ageratifolium
                                               Eupatorium ageratifolium var. herbaceum
                                             Eupatorium albicaule
                                               Eupatorium albicaule var. laxius
                                             Eupatorium album
                                               Eupatorium album var. album
                                               Eupatorium album var. glandulosum
                                               Eupatorium album var. monardifolium
                                               Eupatorium album var. subvenosum
                                               Eupatorium album var. vaseyi
                                             Eupatorium altissimum
                                                   [Eupatorium saltuense]
                                             Eupatorium amblyolepis
                                             Eupatorium amygdalinum
                                             Eupatorium anomalum
                                             Eupatorium apiculatum
                                             Eupatorium areolare
                                               Eupatorium areolare var. leiocarpum
                                             Eupatorium argutum
                                             Eupatorium aromaticum
                                               Eupatorium aromaticum var. incisum
                                             Eupatorium aschenbornianum
                                             Eupatorium azureum
                                             Eupatorium bertholdii
                                             Eupatorium betonicifolium
                                             Eupatorium billbergianum
                                             Eupatorium boreale
                                             Eupatorium borinquense
                                             Eupatorium brevipes
                                             Eupatorium buniifolium
                                             Eupatorium bupleurifolium
                                             Eupatorium calophyllum
                                             Eupatorium candolleanum
                                             Eupatorium cannabinum
                                             Eupatorium capillifolium
                                               Eupatorium capillifolium var. leptophyllum
                                             Eupatorium ceriferum
                                             Eupatorium chapmanii
                                             Eupatorium chiapense
                                             Eupatorium choricephalum
                                             Eupatorium christieanum
                                             Eupatorium chrysostyloides
                                             Eupatorium chrysostylum
                                             Eupatorium collinum
                                             Eupatorium collodes
                                             Eupatorium compositifolium
                                             Eupatorium cordatum
                                             Eupatorium cordigerum
                                             Eupatorium corymbosum
                                             Eupatorium coulteri
                                             Eupatorium crassirameum
                                             Eupatorium cuneatum
                                             Eupatorium cuneifolium
                                               Eupatorium cuneifolium var. semiserratum
                                             Eupatorium daleoides
                                             Eupatorium dasycarpum
                                             Eupatorium deltoideum
                                             Eupatorium dibollii
                                             Eupatorium dolicholepis
                                             Eupatorium donnell-smithii
                                             Eupatorium droserolepis
                                             Eupatorium dryophilum
                                             Eupatorium dubium
                                             Eupatorium erythropappum
                                             Eupatorium espinosarum
                                             Eupatorium eugenei
                                             Eupatorium falcatum
                                             Eupatorium fernaldii
                                             Eupatorium filicaule
                                             Eupatorium fistulosum
                                             Eupatorium flourensifolium
                                             Eupatorium frustratum
                                             Eupatorium galeottii
                                             Eupatorium geraniifolium
                                             Eupatorium glabratum
                                             Eupatorium glaucescens
                                             Eupatorium glechonophyllum
                                             Eupatorium godfreyanum
                                             Eupatorium gracilicaule
                                             Eupatorium haenkeanum
                                             Eupatorium hecatanthum
                                             Eupatorium holwayanum
                                             Eupatorium holzingeri
                                             Eupatorium hookerianum
                                             Eupatorium hospitale
                                             Eupatorium hyssopifolium
                                               Eupatorium hyssopifolium var. calcaratum
                                               Eupatorium hyssopifolium var. hyssopifolium
                                               Eupatorium hyssopifolium var. laciniatum
                                               Eupatorium hyssopifolium var. linearifolium
                                             Eupatorium hyssopinum
                                             Eupatorium iltisii
                                             Eupatorium incomptum
                                             Eupatorium iresinoides
                                             Eupatorium juncundum
                                             Eupatorium karwinskianum
                                             Eupatorium kleinioides
                                             Eupatorium koelliaefolium
                                             Eupatorium laevigatum
                                             Eupatorium lancifolium
                                             Eupatorium lanicaule
                                             Eupatorium lasiophthalmum
                                             Eupatorium latidens
                                             Eupatorium lecheifolium
                                             Eupatorium leptophyllum
                                             Eupatorium leucocephalum
                                             Eupatorium leucolepis
                                               Eupatorium leucolepis var. leucolepis
                                               Eupatorium leucolepis var. novae-angliae
                                               Eupatorium leucolepis var. novaeangliae
                                             Eupatorium ligustrinum
                                             Eupatorium linearifolium
                                             Eupatorium lobbii
                                             Eupatorium longipes
                                             Eupatorium lozanoanum
                                             Eupatorium luciae-brauniae
                                             Eupatorium lucidum
                                             Eupatorium macdougallii
                                             Eupatorium macrocephalum
                                             Eupatorium macrophyllum
                                             Eupatorium maculatum
                                               Eupatorium maculatum var. bruneri
                                                     [Eupatoriadelphus maculatus var. bruneri]
                                                     [Eupatorium bruneri]
                                                     [Eupatorium maculatum ssp. bruneri]
                                               Eupatorium maculatum var. foliosum
                                             Eupatorium mairetianum
                                             Eupatorium megaphyllum
                                             Eupatorium micranthum
                                             Eupatorium microstemon
                                             Eupatorium mikanioides
                                             Eupatorium mohrii
                                             Eupatorium monanthum
                                             Eupatorium morifolium
                                             Eupatorium multifidum
                                             Eupatorium nelsonii
                                             Eupatorium odoratum
                                             Eupatorium oligocephalum
                                             Eupatorium orbignyanum
                                             Eupatorium oreithales
                                             Eupatorium oresbium
                                             Eupatorium oteroi
                                             Eupatorium palmeri
                                               Eupatorium palmeri var. tonsum
                                             Eupatorium pansamalense
                                             Eupatorium pasadenense
                                             Eupatorium pazcuarense
                                             Eupatorium pectinatum
                                             Eupatorium pedunculosum
                                             Eupatorium peninsulare
                                               Eupatorium peninsulare var. peninsulare
                                             Eupatorium perfoliatum
                                               Eupatorium perfoliatum var. colpophilum
                                               Eupatorium perfoliatum var. cuneatum
                                               Eupatorium perfoliatum var. perfoliatum
                                               Eupatorium perfoliatum var. truncatum
                                             Eupatorium perornatum
                                             Eupatorium petaloideum
                                             Eupatorium petiolare
                                             Eupatorium petraeum
                                             Eupatorium pilosum
                                             Eupatorium pinabetense
                                             Eupatorium pittieri
                                             Eupatorium polyodon
                                             Eupatorium porriginosum
                                             Eupatorium portoricense
                                             Eupatorium pubescens
                                             Eupatorium pulchellum
                                             Eupatorium purpureum
                                               Eupatorium purpureum var. amoenum
                                               Eupatorium purpureum var. foliosum
                                               Eupatorium purpureum var. holzingeri
                                               Eupatorium purpureum var. purpureum
                                             Eupatorium purpusi
                                             Eupatorium purpusii
                                             Eupatorium rafaelense
                                             Eupatorium recurvans
                                             Eupatorium resinifluum
                                             Eupatorium resinosum
                                               Eupatorium resinosum var. kentuckiense
                                             Eupatorium rhomboideum
                                             Eupatorium riparium
                                             Eupatorium rivale
                                             Eupatorium rotundifolium
                                               Eupatorium rotundifolium ssp. ovatum
                                               Eupatorium rotundifolium var. cordigerum
                                               Eupatorium rotundifolium var. ovatum
                                               Eupatorium rotundifolium var. rotundifolium
                                               Eupatorium rotundifolium var. saundersii
                                               Eupatorium rotundifolium var. scabridum
                                             Eupatorium rubricaule
                                             Eupatorium rugosum
                                               Eupatorium rugosum var. angustata
                                               Eupatorium rugosum var. chlorolepis
                                               Eupatorium rugosum var. tomentellum
                                               Eupatorium rugosum var. villicaule
                                             Eupatorium saltillense
                                             Eupatorium salvia
                                             Eupatorium sanctopaulense
                                             Eupatorium scabrellum
                                             Eupatorium scabridum
                                             Eupatorium schaffneri
                                             Eupatorium scorodonioides
                                             Eupatorium selerianum
                                             Eupatorium semiserratum
                                               Eupatorium semiserratum var. lancifolium
                                             Eupatorium serotinum
                                               Eupatorium serotinum var. polyneuron
                                             Eupatorium serratum
                                             Eupatorium sessilifolium
                                               Eupatorium sessilifolium var. brittonianum
                                               Eupatorium sessilifolium var. sessilifolium
                                               Eupatorium sessilifolium var. vaseyi
                                             Eupatorium shastense
                                             Eupatorium sinuatum
                                             Eupatorium smithii
                                             Eupatorium solidaginoides
                                             Eupatorium sordidum
                                             Eupatorium sphenopodum
                                             Eupatorium spinaciaefolium
                                             Eupatorium squarroso-ramosum
                                             Eupatorium steelei
                                             Eupatorium strictum
                                             Eupatorium subhastatum
                                             Eupatorium subintegrum
                                             Eupatorium surutatoanum
                                             Eupatorium torreyanum
                                             Eupatorium tortifolium
                                             Eupatorium trifoliatum
                                               Eupatorium trifoliatum var. foliosum
                                             Eupatorium trinervium
                                             Eupatorium triplinerve
                                             Eupatorium tubiflorum
                                             Eupatorium tuerckheimii
                                             Eupatorium urticaefolium
                                             Eupatorium vaseyi
                                             Eupatorium venulosum
                                             Eupatorium verbenaefolium
                                             Eupatorium verbenifolium
                                             Eupatorium veronicifolium
                                             Eupatorium viburnoides
                                             Eupatorium villosum
                                             Eupatorium viscosissimum
                                             Eupatorium vitalbae
                                             Eupatorium x cordigerum
                                             Eupatorium x pinnatifidum
                                             Eupatorium x polyneuron
                                             Eupatorium x truncatum
                                             Eupatorium xestolepis
                                     Euphrosyne
                                             Euphrosyne partheniifolia
                                     Eurybia
                                             Eurybia avita
                                             Eurybia chapmanii
                                             Eurybia chlorolepis
                                             Eurybia compacta
                                             Eurybia conspicua
                                             Eurybia divaricata
                                                   [Aster claytonii]
                                                   [Aster flexilis]
                                             Eurybia eryngiifolia
                                             Eurybia furcata
                                             Eurybia glomerata
                                             Eurybia hemispherica
                                             Eurybia integrifolia
                                                   [Aster integrifolius]
                                             Eurybia jonesiae
                                             Eurybia macrophylla
                                                   [Aster ianthinus]
                                                   [Aster macrophyllus var. apricensis]
                                                   [Aster macrophyllus var. excelsior]
                                                   [Aster macrophyllus var. ianthinus]
                                                   [Aster macrophyllus var. pinguifolius]
                                                   [Aster macrophyllus var. sejunctus]
                                                   [Aster macrophyllus var. velutinus]
                                                   [Aster macrophyllus]
                                                   [Aster multiformis]
                                                   [Aster nobilis]
                                                   [Aster riciniatus]
                                                   [Aster roscidus]
                                                   [Aster violaris]
                                             Eurybia merita
                                             Eurybia mirabilis
                                             Eurybia paludosa
                                                   [Aster paludosus]
                                             Eurybia pulchra
                                                   [Aster glaucodes ssp. pulcher]
                                                   [Aster glaucodes var. pulcher]
                                             Eurybia pygmaea
                                             Eurybia radula
                                             Eurybia radulina
                                                   [Aster eliasii]
                                                   [Aster radulinus]
                                                   [Weberaster radulinus]
                                             Eurybia saxicastelli
                                             Eurybia saxicastellii
                                             Eurybia schreberi
                                             Eurybia sibirica
                                               Eurybia sibirica var. gigantea
                                             Eurybia spectabilis
                                             Eurybia spinulosa
                                             Eurybia surculosa
                                             Eurybia wasatchensis
                                                   [Aster glaucus var. wasatchensis]
                                                   [Aster wasatchensis var. pulcher]
                                                   [Aster wasatchensis]
                                             Eurybia x herveyi
                                     Euryops
                                             Euryops athanasiae
                                             Euryops chrysanthemoides
                                             Euryops multifidus
                                                   [Euryops subcarnosus ssp. vulgaris]
                                             Euryops pectinatus
                                             Euryops pedunculatus
                                     Eutetras
                                             Eutetras palmeri
                                     Euthamia
                                             Euthamia camporum
                                             Euthamia caroliniana
                                             Euthamia chrysothamnoides
                                             Euthamia floribunda
                                             Euthamia galetorum
                                             Euthamia glutinosa
                                             Euthamia graminifolia
                                               Euthamia graminifolia var. galetorum
                                               Euthamia graminifolia var. graminifolia
                                               Euthamia graminifolia var. hirtipes
                                               Euthamia graminifolia var. major
                                               Euthamia graminifolia var. nuttallii
                                             Euthamia gymnospermoides
                                             Euthamia hirtipes
                                             Euthamia leptocephala
                                                   [Solidago leptocephala]
                                             Euthamia media
                                             Euthamia microcephala
                                             Euthamia microphylla
                                             Euthamia minor
                                             Euthamia nuttallii
                                             Euthamia occidentalis
                                                   [Euthamia californica]
                                                   [Euthamia linearifolia]
                                                   [Solidago occidentalis]
                                             Euthamia pulverulenta
                                             Euthamia remota
                                             Euthamia tenuifolia
                                               Euthamia tenuifolia var. pycnocephala
                                               Euthamia tenuifolia var. tenuifolia
                                     Eutrochium
                                             Eutrochium dubium
                                             Eutrochium fistulosum
                                             Eutrochium maculatum
                                               Eutrochium maculatum var. bruneri
                                               Eutrochium maculatum var. foliosum
                                               Eutrochium maculatum var. maculatum
                                             Eutrochium purpureum
                                               Eutrochium purpureum var. holzingeri
                                               Eutrochium purpureum var. purpureum
                                             Eutrochium steelei
                                     Evax
                                             Evax caulescens
                                               Evax caulescens var. brevifolia
                                               Evax caulescens var. humilis
                                               Evax caulescens var. petiolata
                                             Evax involucrata
                                             Evax sparsiflora
                                               Evax sparsiflora var. brevifolia
                                     Facelis
                                             Facelis apiculata
                                             Facelis retusa
                                     Felicia
                                             Felicia amelloides
                                             Felicia amoena
                                             Felicia fruticosa
                                             Felicia uliginosa
                                     Ferreyranthus
                                     Ferreyrella
                                     Filaginella
                                     Filaginopsis
                                             Filaginopsis multicaulis
                                     Filago
                                             Filago arvensis
                                             Filago candida
                                             Filago germanica
                                             Filago minima
                                             Filago nivea
                                             Filago pyramidata
                                               Filago pyramidata var. pyramidata
                                             Filago verna
                                             Filago vulgaris
                                     Filifolium
                                             Filifolium sibiricum
                                     Fitchia
                                             Fitchia speciosa
                                     Flaveria
                                             Flaveria angustifolia
                                             Flaveria anomala
                                             Flaveria bidentis
                                             Flaveria brownii
                                             Flaveria campestris
                                             Flaveria chloraefolia
                                             Flaveria chlorifolia
                                             Flaveria cronquistii
                                             Flaveria floridana
                                             Flaveria latifolia
                                             Flaveria linearis
                                             Flaveria longifolia
                                             Flaveria mcdougallii
                                                   [Flaveria macdougalii]
                                                   [Flaveria macdougallii]
                                                   [Flaveria mcdougalii]
                                             Flaveria oppositifolia
                                             Flaveria palmeri
                                             Flaveria pringlei
                                             Flaveria ramosissima
                                             Flaveria robusta
                                             Flaveria sonorensis
                                             Flaveria trinervia
                                                   [Oedera trinervia]
                                     Fleischmannia
                                             Fleischmannia arguta
                                             Fleischmannia bohlmanniana
                                             Fleischmannia guatemalensis
                                             Fleischmannia imitans
                                             Fleischmannia incarnata
                                                   [Eupatorium incarnatum]
                                             Fleischmannia laxa
                                             Fleischmannia microstemon
                                             Fleischmannia pratensis
                                             Fleischmannia pycnocephala
                                                   [Eupatorium pycnocephalum]
                                             Fleischmannia sinclairii
                                             Fleischmannia sonorae
                                                   [Eupatorium sonorae]
                                             Fleischmannia trinervia
                                     Fleischmanniopsis
                                             Fleischmanniopsis leucocephala
                                     Florestina
                                             Florestina latifolia
                                             Florestina pedata
                                             Florestina platyphylla
                                             Florestina purpurea
                                             Florestina simplicifolia
                                             Florestina tripteris
                                                   [Palafoxia tripteris var. brevis]
                                                   [Palafoxia tripteris]
                                     Floscaldasia
                                     Flotovia
                                     Flourensia
                                             Flourensia cernua
                                             Flourensia glutinosa
                                             Flourensia ilicifolia
                                             Flourensia laurifolia
                                             Flourensia microphylla
                                             Flourensia monticola
                                             Flourensia pringlei
                                                   [Helianthella pringlei]
                                             Flourensia resinosa
                                             Flourensia retinophylla
                                             Flourensia solitaria
                                             Flourensia thurifera
                                     Flyriella
                                             Flyriella chrysostyla
                                             Flyriella parryi
                                                   [Brickellia shineri]
                                                   [Eupatorium parryi]
                                     Franseria
                                             Franseria acerifolia
                                             Franseria albicaulis
                                             Franseria arborescens
                                               Franseria bipinnatifida var. dubia
                                             Franseria bryantii
                                             Franseria camphorata
                                               Franseria camphorata var. leptophylla
                                             Franseria caudata
                                               Franseria chamissonis var. viscida
                                             Franseria flexuosa
                                             Franseria hispida
                                             Franseria incana
                                             Franseria linearis
                                             Franseria nivea
                                             Franseria palmeri
                                             Franseria villosa
                                     Fulcaldea
                                     Gaertneria
                                             Gaertneria linearis
                                     Gaillardia
                                                           Gaillardia X grandiflora
                                             Gaillardia acaulis
                                             Gaillardia aestivalis
                                               Gaillardia aestivalis var. aestivalis
                                                     [Gaillardia chrysantha]
                                                     [Gaillardia fastigiata]
                                                     [Gaillardia lanceolata var. fastigiata]
                                                     [Gaillardia lanceolata var. flavovirens]
                                                     [Gaillardia lanceolata]
                                                     [Gaillardia rigida]
                                                     [Gaillardia serotina]
                                               Gaillardia aestivalis var. flavovirens
                                               Gaillardia aestivalis var. winkleri
                                             Gaillardia amblyodon
                                             Gaillardia aristata
                                             Gaillardia arizonica
                                               Gaillardia arizonica var. arizonica
                                               Gaillardia arizonica var. pringlei
                                                     [Gaillardia pringlei]
                                             Gaillardia coahuilensis
                                                   [Gaillardia mexicana]
                                             Gaillardia comosa
                                             Gaillardia crassa
                                             Gaillardia crinita
                                             Gaillardia flava
                                             Gaillardia globosa
                                             Gaillardia grandiflora
                                             Gaillardia gypsophila
                                             Gaillardia henricksonii
                                             Gaillardia linearis
                                             Gaillardia lutea
                                               Gaillardia lutea var. winkleri
                                             Gaillardia megapotamica
                                             Gaillardia multiceps
                                               Gaillardia multiceps var. microcephala
                                               Gaillardia multiceps var. multiceps
                                             Gaillardia parryi
                                             Gaillardia picta
                                             Gaillardia pinnatifida
                                               Gaillardia pinnatifida var. linearis
                                               Gaillardia pinnatifida var. pinnatifida
                                                     [Gaillardia gracilis]
                                                     [Gaillardia mearnsii]
                                             Gaillardia powellii
                                             Gaillardia pulchella
                                               Gaillardia pulchella var. australis
                                               Gaillardia pulchella var. drummondii
                                               Gaillardia pulchella var. picta
                                               Gaillardia pulchella var. pulchella
                                                     [Gaillardia drummondii]
                                                     [Gaillardia neomexicana]
                                                     [Gaillardia villosa]
                                             Gaillardia spathulata
                                             Gaillardia straminea
                                             Gaillardia suavis
                                                   [Agassizia suavis]
                                                   [Gaillardia trinervata]
                                             Gaillardia turneri
                                     Galatella
                                             Galatella punctata
                                     Galeana
                                             Galeana pratensis
                                     Galinsoga
                                           [Adventina]
                                             Galinsoga durangensis
                                             Galinsoga filiformis
                                             Galinsoga hispida
                                             Galinsoga parviflora
                                                   [Galinsoga semicalva var. percalva]
                                                   [Galinsoga semicalva]
                                               Galinsoga parviflora var. parviflora
                                               Galinsoga parviflora var. semicalva
                                             Galinsoga quadriradiata
                                                   [Galinsoga aristulata]
                                                   [Galinsoga bicolorata]
                                                   [Galinsoga caracasana]
                                                   [Galinsoga ciliata]
                                             Galinsoga spellenbergii
                                             Galinsoga subdiscoidea
                                             Galinsoga triradiata
                                             Galinsoga urticifolia
                                     Gamochaeta
                                             Gamochaeta americana
                                                   [Gamochaeta spicata]
                                                   [Gnaphalium americanum]
                                                   [Gnaphalium purpureum var. americanum]
                                                   [Gnaphalium spicatum]
                                             Gamochaeta antillana
                                             Gamochaeta argyrinea
                                             Gamochaeta calviceps
                                                   [Gamochaeta falcata]
                                             Gamochaeta chionesthes
                                             Gamochaeta coarctata
                                             Gamochaeta pensylvanica
                                                   [Gnaphalium pensylvanicum]
                                                   [Gnaphalium peregrinum]
                                                   [Gnaphalium purpureum var. spathulatum]
                                                   [Gnaphalium spathulatum]
                                             Gamochaeta purpurea
                                                   [Gnaphalium purpureum]
                                             Gamochaeta rosacea
                                                   [Gnaphalium rosaceum]
                                             Gamochaeta simplicicaulis
                                             Gamochaeta sphacelata
                                                   [Gnaphalium sphacelatum]
                                             Gamochaeta sphacilata
                                             Gamochaeta stachydifolia
                                             Gamochaeta stagnalis
                                             Gamochaeta ustulata
                                     Garberia
                                             Garberia fruticosa
                                             Garberia heterophylla
                                     Garcibarrigoa
                                     Garcilassa
                                     Gazania
                                             Gazania heterochaeta
                                             Gazania krebsiana
                                             Gazania linearis
                                                   [Gorteria linearis]
                                             Gazania longiscapa
                                             Gazania rigens
                                                   [Gazania splendens]
                                     Geigeria
                                             Geigeria africana
                                     Geissolepis
                                             Geissolepis suaedaefolia
                                     Geraea
                                             Geraea canescens
                                               Geraea canescens var. canescens
                                               Geraea canescens var. paniculata
                                             Geraea viscida
                                     Gerbera
                                             Gerbera crocea
                                             Gerbera jamesonii
                                     Gifola
                                             Gifola germanica
                                     Glebionis
                                             Glebionis coronaria
                                                   [Glebionis coronarium]
                                             Glebionis segetum
                                                   [Chrysanthemum segetum]
                                     Glossogyne
                                             Glossogyne tenuifolia
                                     Glyptopleura
                                             Glyptopleura marginata
                                             Glyptopleura setulosa
                                     Gnaphaliothamnus
                                             Gnaphaliothamnus lavandulifolius
                                             Gnaphaliothamnus salicifolius
                                     Gnaphalium
                                             Gnaphalium albatum
                                             Gnaphalium alienum
                                             Gnaphalium arvense
                                             Gnaphalium beneolens
                                                   [Gnaphalium canescens ssp. beneolens]
                                             Gnaphalium bourgovii
                                             Gnaphalium brachypterum
                                             Gnaphalium chartaceum
                                             Gnaphalium cheiranthifolium
                                             Gnaphalium collinum
                                             Gnaphalium concinnum
                                             Gnaphalium conoideum
                                             Gnaphalium dioicum
                                             Gnaphalium domingense
                                             Gnaphalium ehrenbergianum
                                             Gnaphalium elegans
                                             Gnaphalium exilifolium
                                                   [Gnaphalium grayi]
                                             Gnaphalium germanicum
                                             Gnaphalium gymnocephalus
                                             Gnaphalium hawaiiense
                                             Gnaphalium helleri
                                               Gnaphalium helleri var. micradenium
                                             Gnaphalium hintoniorum
                                             Gnaphalium indicum
                                             Gnaphalium inornatum
                                             Gnaphalium japonicum
                                             Gnaphalium leucophyllum
                                             Gnaphalium liebmannii
                                             Gnaphalium microphyllum
                                             Gnaphalium norvegicum
                                             Gnaphalium obtusifolium
                                               Gnaphalium obtusifolium var. helleri
                                               Gnaphalium obtusifolium var. micradenium
                                               Gnaphalium obtusifolium var. praecox
                                               Gnaphalium obtusifolium var. saxicola
                                             Gnaphalium palustre
                                                   [Filaginella palustris]
                                             Gnaphalium philippi
                                             Gnaphalium polycaulon
                                             Gnaphalium polycephalum
                                             Gnaphalium portoricense
                                             Gnaphalium ramosissimum
                                             Gnaphalium salicifolium
                                             Gnaphalium sandwicensium
                                               Gnaphalium sandwicensium var. flagellare
                                               Gnaphalium sandwicensium var. hawaiiense
                                               Gnaphalium sandwicensium var. kilaueanum
                                               Gnaphalium sandwicensium var. lineatum
                                               Gnaphalium sandwicensium var. molokaiense
                                             Gnaphalium saxicola
                                             Gnaphalium schraderi
                                             Gnaphalium semiamplexicaule
                                             Gnaphalium semilanatum
                                             Gnaphalium sonorae
                                             Gnaphalium sphacilatum
                                             Gnaphalium supinum
                                             Gnaphalium sylvaticum
                                             Gnaphalium thermale
                                                   [Gnaphalium canescens ssp. thermale]
                                                   [Gnaphalium microcephalum ssp. thermale]
                                                   [Gnaphalium microcephalum var. thermale]
                                             Gnaphalium uliginosum
                                                   [Filaginella uliginosa]
                                             Gnaphalium ustulatum
                                                   [Gnaphalium purpureum var. ustulatum]
                                             Gnaphalium virgatum
                                             Pseudognaphalium oxyphyllum
                                                   [Gnaphalium oxyphyllum]
                                     Gochnatia
                                             Gochnatia arborescens
                                             Gochnatia arequipensis
                                             Gochnatia argentina
                                             Gochnatia argyrea
                                             Gochnatia fascicularis
                                             Gochnatia foliolosa
                                             Gochnatia glutinosa
                                             Gochnatia haumaniana
                                             Gochnatia hypoleuca
                                             Gochnatia obtusata
                                             Gochnatia paniculata
                                             Gochnatia polymorpha
                                             Gochnatia pulchra
                                     Goldmanella
                                             Goldmanella sarmentosa
                                     Gongrostylus
                                     Gonotheca
                                             Gonotheca helianthoides
                                     Gorteria
                                     Graphistylis
                                             Graphistylis oreophila
                                     Grazielia
                                             Grazielia serrata
                                     Greenella
                                             Greenella ramulosa
                                     Grindelia
                                             Grindelia acutifolia
                                             Grindelia adenodonta
                                             Grindelia arenicola
                                               Grindelia arenicola var. pachyphylla
                                             Grindelia arizonica
                                               Grindelia arizonica var. arizonica
                                                     [Grindelia arizonica var. dentata]
                                                     [Grindelia arizonica var. microphylla]
                                               Grindelia arizonica var. neomexicana
                                               Grindelia arizonica var. stenophylla
                                             Grindelia brachystephana
                                             Grindelia bracteosa
                                             Grindelia camporum
                                               Grindelia camporum var. bracteosa
                                               Grindelia camporum var. camporum
                                               Grindelia camporum var. parviflora
                                               Grindelia camporum var. australis
                                               Grindelia camporum var. davyi
                                             Grindelia chiloensis
                                             Grindelia ciliata
                                             Grindelia ciliatus
                                                   [Grindelia papposa]
                                                   [Haplopappus ciliatus]
                                                   [Prionopsis ciliata]
                                             Grindelia columbiana
                                             Grindelia decumbens
                                               Grindelia decumbens var. decumbens
                                               Grindelia decumbens var. subincisa
                                             Grindelia fastigiata
                                             Grindelia fraxinipratensis
                                             Grindelia fraxino-pratensis
                                             Grindelia fraxinopratensis
                                             Grindelia glutinosa
                                             Grindelia grandiflora
                                             Grindelia greenmanii
                                             Grindelia havardii
                                             Grindelia hintoniorum
                                             Grindelia hirsutula
                                               Grindelia hirsutula ssp. rubricaulis
                                               Grindelia hirsutula var. davyi
                                               Grindelia hirsutula var. hallii
                                                     [Grindelia hallii]
                                               Grindelia hirsutula var. hirsutula
                                               Grindelia hirsutula var. maritima
                                               Grindelia hirsutula var. subintegra
                                               Grindelia hirsutula var. brevisquama
                                             Grindelia howellii
                                             Grindelia humilis
                                             Grindelia inornata
                                               Grindelia inornata var. angusta
                                               Grindelia inornata var. inornata
                                             Grindelia integrifolia
                                               Grindelia integrifolia var. macrophylla
                                             Grindelia inuloides
                                               Grindelia inuloides var. glandulosa
                                             Grindelia laciniata
                                             Grindelia lanceolata
                                               Grindelia lanceolata var. lanceolata
                                               Grindelia lanceolata var. texana
                                             Grindelia latifolia
                                               Grindelia latifolia ssp. platyphylla
                                               Grindelia latifolia var. platyphylla
                                             Grindelia littoralis
                                             Grindelia maritima
                                             Grindelia microcephala
                                               Grindelia microcephala var. adenodonta
                                               Grindelia microcephala var. pusilla
                                             Grindelia nana
                                               Grindelia nana ssp. columbiana
                                               Grindelia nana var. discoidea
                                               Grindelia nana var. integerrima
                                               Grindelia nana var. integrifolia
                                               Grindelia nana var. nana
                                               Grindelia nana var. turbinella
                                             Grindelia neomexicana
                                             Grindelia nuda
                                               Grindelia nuda var. aphanactis
                                                     [Grindelia aphanactis]
                                               Grindelia nuda var. nuda
                                             Grindelia oolepis
                                             Grindelia oxylepis
                                               Grindelia oxylepis var. eligulata
                                             Grindelia pacifica
                                             Grindelia paludosa
                                             Grindelia paysonorum
                                             Grindelia procera
                                             Grindelia pulchella
                                             Grindelia pusilla
                                             Grindelia revoluta
                                             Grindelia robinsonii
                                             Grindelia robusta
                                               Grindelia robusta var. angustifolia
                                               Grindelia robusta var. bracteosa
                                               Grindelia robusta var. patens
                                             Grindelia rubricaulis
                                               Grindelia rubricaulis var. elata
                                             Grindelia scabra
                                               Grindelia scabra var. neomexicana
                                             Grindelia setulifera
                                             Grindelia squarrosa
                                               Grindelia squarrosa var. integrifolia
                                               Grindelia squarrosa var. nuda
                                               Grindelia squarrosa var. quasiperennis
                                                     [Grindelia perennis]
                                               Grindelia squarrosa var. serrulata
                                                     [Grindelia serrulata]
                                               Grindelia squarrosa var. squarrosa
                                             Grindelia stricta
                                               Grindelia stricta ssp. blakei
                                               Grindelia stricta ssp. venulosa
                                               Grindelia stricta var. angustifolia
                                               Grindelia stricta var. platyphylla
                                               Grindelia stricta var. stricta
                                             Grindelia subalpina
                                               Grindelia subalpina var. erecta
                                               Grindelia subalpina var. subalpina
                                             Grindelia subdecurrens
                                             Grindelia subincisa
                                             Grindelia tarapacana
                                             Grindelia tehuelches
                                             Grindelia texana
                                               Grindelia texana var. lanceolata
                                     Grosvenoria
                                     Guardiola
                                             Guardiola angustifolia
                                             Guardiola arguta
                                             Guardiola carinata
                                             Guardiola mexicana
                                             Guardiola pappifera
                                             Guardiola platyphylla
                                             Guardiola rosei
                                             Guardiola stenodonta
                                             Guardiola tulocarpus
                                               Guardiola tulocarpus var. arguta
                                     Guevaria
                                     Guizotia
                                             Guizotia abyssinica
                                     Gundelia
                                             Gundelia tournefortii
                                     Gundlachia
                                             Gundlachia corymbosa
                                             Gundlachia triantha
                                     Gutierrezia
                                             Gutierrezia alamani
                                             Gutierrezia alamanii
                                               Gutierrezia alamanii var. megalocephala
                                             Gutierrezia argyrocarpa
                                             Gutierrezia arizonica
                                                   [Greenella arizonica]
                                                   [Xanthocephalum arizonicum]
                                             Gutierrezia baccharoides
                                             Gutierrezia californica
                                                   [Gutierrezia bracteata]
                                             Gutierrezia conoidea
                                             Gutierrezia corymbosa
                                             Gutierrezia gilliesii
                                             Gutierrezia grandis
                                             Gutierrezia ionensis
                                             Gutierrezia juncea
                                             Gutierrezia longifolia
                                             Gutierrezia mandonii
                                             Gutierrezia megalocephala
                                             Gutierrezia microcephala
                                                   [Brachyris microcephala]
                                                   [Gutierrezia glomerella]
                                                   [Gutierrezia lucida]
                                                   [Gutierrezia sarothrae var. microcephala]
                                                   [Xanthocephalum lucidum]
                                                   [Xanthocephalum microcephalum]
                                             Gutierrezia petradoria
                                             Gutierrezia pomariensis
                                             Gutierrezia ramulosa
                                             Gutierrezia resinosa
                                             Gutierrezia sarothrae
                                                   [Gutierrezia divaricata]
                                                   [Gutierrezia diversifolia]
                                                   [Gutierrezia lepidota]
                                                   [Gutierrezia linearifolia]
                                                   [Gutierrezia linearis]
                                                   [Gutierrezia linoides]
                                                   [Gutierrezia longipappa]
                                                   [Gutierrezia sarothrae var. pomariensis]
                                                   [Gutierrezia tenuis]
                                                   [Solidago sarothrae]
                                                   [Xanthocephalum sarothrae var. pomariense]
                                                   [Xanthocephalum sarothrae]
                                                   [Xanthocephalum tenue]
                                             Gutierrezia scoparia
                                             Gutierrezia sericocarpa
                                             Gutierrezia serotina
                                                   [Gutierrezia polyantha]
                                             Gutierrezia solbrigii
                                             Gutierrezia spathulata
                                             Gutierrezia sphaerocephala
                                                   [Gutierrezia eriocarpa]
                                                   [Xanthocephalum sphaerocephalum var. eriocarpum]
                                                   [Xanthocephalum sphaerocephalum]
                                             Gutierrezia texana
                                               Gutierrezia texana var. glutinosa
                                                     [Gutierrezia glutinosa]
                                                     [Hemiachyris glutinosa]
                                               Gutierrezia texana var. texana
                                             Gutierrezia triflora
                                             Gutierrezia wrightii
                                                   [Greenella discoidea]
                                                   [Xanthocephalum wrightii]
                                     Gymnarrhena
                                             Gymnarrhena micrantha
                                     Gymnocoronis
                                             Gymnocoronis spilanthoides
                                     Gymnolaena
                                             Gymnolaena oaxacana
                                     Gymnolomia
                                             Gymnolomia brevifolia
                                             Gymnolomia ghiesbreghtii
                                             Gymnolomia hypochlora
                                             Gymnolomia linearis
                                             Gymnolomia nevadensis
                                             Gymnolomia parkinsonii
                                             Gymnolomia patens
                                               Gymnolomia patens var. abbreviata
                                             Gymnolomia triloba
                                     Gymnosperma
                                             Gymnosperma glutinosum
                                                   [Selloa glutinosa]
                                                   [Xanthocephalum glutinosum]
                                     Gymnostyles
                                             Gymnostyles anthemifolia
                                             Gymnostyles stolonifera
                                     Gynoxys
                                     Gynura
                                             Gynura aurantiaca
                                             Gynura sarmentosa
                                     Gypothamnium
                                     Gyptis
                                             Gyptis pinnatifida
                                     Halea
                                             Halea ludoviciana
                                     Hamulium
                                             Hamulium alatum
                                     Handelia
                                             Handelia trichophylla
                                     Haplocarpha
                                             Haplocarpha lyrata
                                     Haploesthes
                                             Haploesthes fruticosa
                                             Haploesthes greggii
                                               Haploesthes greggii var. texana
                                             Haploesthes robusta
                                     Haplopappus
                                             Haplopappus aberrans
                                             Haplopappus alpigenus
                                             Haplopappus alpinus
                                             Haplopappus anthylloides
                                             Haplopappus apargioides
                                             Haplopappus arenarius
                                               Haplopappus arenarius var. incisifolius
                                             Haplopappus aureus
                                             Haplopappus bellidifolius
                                             Haplopappus berberidis
                                             Haplopappus bloomeri
                                               Haplopappus bloomeri ssp. compactus
                                               Haplopappus bloomeri ssp. sonnei
                                               Haplopappus bloomeri var. angustatus
                                               Haplopappus bloomeri var. compactus
                                               Haplopappus bloomeri var. greenei
                                               Haplopappus bloomeri var. ophitidis
                                               Haplopappus bloomeri var. sonnei
                                             Haplopappus brandegeei
                                             Haplopappus brickellioides
                                             Haplopappus bustillosianus
                                             Haplopappus canescens
                                             Haplopappus canus
                                             Haplopappus carthamoides
                                               Haplopappus carthamoides ssp. rigidus
                                               Haplopappus carthamoides var. erythropappus
                                               Haplopappus carthamoides var. maximus
                                               Haplopappus carthamoides var. rigidus
                                               Haplopappus carthamoides var. subsquarrosus
                                               Haplopappus carthamoides var. typicus
                                             Haplopappus cerberoanus
                                             Haplopappus chrysanthemifolius
                                             Haplopappus clementis
                                             Haplopappus coloradoensis
                                             Haplopappus compactus
                                             Haplopappus croceus
                                               Haplopappus croceus ssp. typicus
                                             Haplopappus deserticola
                                             Haplopappus detonsus
                                             Haplopappus diplopappus
                                             Haplopappus donianus
                                             Haplopappus eastwoodiae
                                             Haplopappus engelmannii
                                             Haplopappus enormidens
                                             Haplopappus ericoides
                                               Haplopappus ericoides ssp. blakei
                                             Haplopappus eximius
                                               Haplopappus eximius ssp. peirsonii
                                             Haplopappus ferrisiae
                                             Haplopappus foliosus
                                             Haplopappus fremontii
                                               Haplopappus fremontii ssp. monocephalus
                                               Haplopappus fremontii ssp. typicus
                                               Haplopappus fremontii ssp. wardii
                                             Haplopappus gilmanii
                                             Haplopappus glutinosus
                                             Haplopappus greenei
                                               Haplopappus greenei var. mollis
                                             Haplopappus grindelioides
                                             Haplopappus hallii
                                             Haplopappus hirtus
                                               Haplopappus hirtus ssp. lanulosus
                                               Haplopappus hirtus ssp. sonchifolius
                                               Haplopappus hirtus ssp. typicus
                                               Haplopappus hirtus var. lanulosus
                                               Haplopappus hirtus var. sonchifolius
                                             Haplopappus illinitus
                                             Haplopappus insecticruris
                                             Haplopappus integerrimus
                                             Haplopappus integrifolius
                                               Haplopappus integrifolius ssp. insecticruris
                                               Haplopappus integrifolius ssp. liatriformis
                                               Haplopappus integrifolius ssp. scaberulus
                                               Haplopappus integrifolius ssp. typicus
                                             Haplopappus juarezensis
                                             Haplopappus lanceolatus
                                               Haplopappus lanceolatus ssp. solidagineus
                                               Haplopappus lanceolatus ssp. tenuicaulis
                                               Haplopappus lanceolatus ssp. vaseyi
                                               Haplopappus lanceolatus var. sublanatus
                                               Haplopappus lanceolatus var. tenuicaulis
                                               Haplopappus lanceolatus var. typicus
                                               Haplopappus lanceolatus var. vaseyi
                                             Haplopappus leverichii
                                             Haplopappus liatriformis
                                             Haplopappus lignumviridis
                                             Haplopappus longipes
                                             Haplopappus lucidus
                                             Haplopappus lyallii
                                             Haplopappus macraeanus
                                             Haplopappus macrocephalus
                                             Haplopappus macronema
                                               Haplopappus macronema var. canescens
                                               Haplopappus macronema var. linearis
                                               Haplopappus macronema var. typicus
                                             Haplopappus martirensis
                                             Haplopappus menziesii
                                             Haplopappus meyenii
                                             Haplopappus mucronatus
                                             Haplopappus multicaulis
                                             Haplopappus niveus
                                             Haplopappus occidentalis
                                             Haplopappus odontolepis
                                             Haplopappus ophitidis
                                             Haplopappus orcuttii
                                             Haplopappus palmeri
                                               Haplopappus palmeri ssp. pachylepis
                                             Haplopappus paniculatus
                                               Haplopappus paniculatus var. stenocephalus
                                             Haplopappus parishii
                                             Haplopappus parvifolius
                                             Haplopappus paucidentatus
                                             Haplopappus pectinatus
                                             Haplopappus pedunculosus
                                             Haplopappus peirsonii
                                             Haplopappus philippi
                                             Haplopappus phyllocephalus
                                               Haplopappus phyllocephalus var. megacephalus
                                             Haplopappus platylepis
                                             Haplopappus poeppigianus
                                             Haplopappus prunelloides
                                             Haplopappus pulchellus
                                             Haplopappus purpusii
                                             Haplopappus racemosus
                                               Haplopappus racemosus ssp. congestus
                                               Haplopappus racemosus ssp. liatriformis
                                               Haplopappus racemosus ssp. lucidus
                                               Haplopappus racemosus ssp. pinetorum
                                               Haplopappus racemosus var. praticola
                                             Haplopappus radiatus
                                             Haplopappus reicheanus
                                             Haplopappus remyanus
                                             Haplopappus rengifoanus
                                             Haplopappus resinosus
                                             Haplopappus reticulatus
                                             Haplopappus rigidifolius
                                             Haplopappus rosaricus
                                             Haplopappus rotundifolius
                                             Haplopappus rydbergii
                                                   [Haplopappus watsonii var. rydbergii]
                                             Haplopappus saxatilis
                                             Haplopappus scrobiculatus
                                             Haplopappus sericeus
                                             Haplopappus setiger
                                             Haplopappus squarrosus
                                               Haplopappus squarrosus ssp. obtusus
                                               Haplopappus squarrosus ssp. stenolepis
                                             Haplopappus stenophyllus
                                             Haplopappus stolpi
                                             Haplopappus subviscosus
                                             Haplopappus taeda
                                             Haplopappus tenuicaulis
                                             Haplopappus tenuilobus
                                             Haplopappus thiniicola
                                             Haplopappus traskae
                                             Haplopappus uncinatus
                                             Haplopappus validus
                                               Haplopappus validus ssp. graniticus
                                               Haplopappus validus ssp. torreyi
                                             Haplopappus velutinus
                                             Haplopappus vernicosus
                                             Haplopappus villanuevae
                                             Haplopappus wardii
                                             Haplopappus whitneyi
                                               Haplopappus whitneyi ssp. discoideus
                                     Harleya
                                             Harleya oxylepis
                                     Harmonia
                                           [Callineda]
                                             Harmonia doris-nilesiae
                                             Harmonia guggolziorum
                                             Harmonia hallii
                                             Harmonia nutans
                                             Harmonia stebbinsii
                                     Harpaecarpus
                                             Harpaecarpus minimus
                                     Hartwrightia
                                           [Macrostegia]
                                             Hartwrightia floridana
                                     Hasteola
                                             Hasteola robertiorum
                                             Hasteola suaveolens
                                     Hatschbachiella
                                             Hatschbachiella tweedieana
                                     Hazardia
                                             Hazardia berberidis
                                             Hazardia brickellioides
                                             Hazardia cana
                                             Hazardia detonsa
                                             Hazardia enormidens
                                             Hazardia ferrisiae
                                             Hazardia obtusa
                                             Hazardia odontolepis
                                             Hazardia orcuttii
                                             Hazardia rosarica
                                             Hazardia serrata
                                             Hazardia squarrosa
                                               Hazardia squarrosa var. grindelioides
                                                     [Haplopappus squarrosus ssp. grindelioides]
                                               Hazardia squarrosa var. obtusa
                                               Hazardia squarrosa var. squarrosa
                                             Hazardia squarrosus
                                             Hazardia stenolepis
                                             Hazardia vernicosa
                                             Hazardia whitneyi
                                               Hazardia whitneyi var. discoidea
                                               Hazardia whitneyi var. whitneyi
                                     Hebeclinium
                                           [Malacocarpus]
                                             Hebeclinium macrophyllum
                                     Hecastocleis
                                             Hecastocleis shockleyi
                                     Hedosyne
                                             Hedosyne ambrosiifolia
                                                   [Iva ambrosiaefolia]
                                                   [Iva ambrosiifolia ssp. lobata]
                                                   [Iva ambrosiifolia]
                                     Hedypnois
                                             Hedypnois cretica
                                     Heleastrum
                                             Heleastrum hemisphericum
                                     Heleniastrum
                                             Heleniastrum occidentale
                                     Helenium
                                             Helenium amarum
                                               Helenium amarum var. amarum
                                               Helenium amarum var. badium
                                                     [Helenium badium]
                                                     [Helenium tenuifolium var. badium]
                                             Helenium amphilobum
                                             Helenium apterum
                                             Helenium arizonicum
                                             Helenium autumnale
                                               Helenium autumnale var. autumnale
                                                     [Helenium autumnale var. canaliculatum]
                                                     [Helenium autumnale var. parviflorum]
                                                     [Helenium canaliculatum]
                                                     [Helenium latifolium]
                                                     [Helenium parviflorum]
                                               Helenium autumnale var. grandiflorum
                                               Helenium autumnale var. montanum
                                                     [Helenium montanum]
                                             Helenium bigelovii
                                                   [Helenium rivulare]
                                               Helenium bigelovii var. festivum
                                             Helenium bolanderi
                                             Helenium brevifolium
                                             Helenium campestre
                                             Helenium chihuahuensis
                                             Helenium curtisii
                                             Helenium decurrens
                                             Helenium donianum
                                             Helenium drummondii
                                             Helenium elegans
                                               Helenium elegans var. amphibolum
                                               Helenium elegans var. amphilobum
                                               Helenium elegans var. elegans
                                             Helenium flexuosum
                                                   [Helenium floridanum]
                                                   [Helenium godfreyi]
                                                   [Helenium nudiflorum]
                                             Helenium helenium
                                             Helenium incisum
                                             Helenium integrifolium
                                             Helenium laciniatum
                                             Helenium lanciniatum
                                             Helenium linifolium
                                             Helenium macranthum
                                             Helenium mexicanum
                                             Helenium microcephalum
                                               Helenium microcephalum var. microcephalum
                                               Helenium microcephalum var. ooclinium
                                                     [Helenium ooclinium]
                                             Helenium nuttallii
                                             Helenium pinnatifidum
                                             Helenium puberulum
                                             Helenium quadridentatum
                                             Helenium tenuifolium
                                             Helenium thurberi
                                             Helenium urmenetae
                                             Helenium vernale
                                             Helenium virginicum
                                             Helenium x polyphyllum
                                     Helianthella
                                             Helianthella californica
                                               Helianthella californica ssp. californica
                                               Helianthella californica ssp. nevadensis
                                               Helianthella californica ssp. shastensis
                                               Helianthella californica var. californica
                                               Helianthella californica var. nevadensis
                                               Helianthella californica var. shastensis
                                             Helianthella cannonae
                                             Helianthella castanea
                                             Helianthella ciliata
                                             Helianthella douglasii
                                             Helianthella durangensis
                                             Helianthella grandiflora
                                             Helianthella gypsophila
                                             Helianthella madrensis
                                             Helianthella majuscula
                                             Helianthella mexicana
                                             Helianthella microcephala
                                                   [Encelia microcephala]
                                             Helianthella multicaulis
                                             Helianthella nevadensis
                                             Helianthella parryi
                                             Helianthella quinquenervis
                                                   [Helianthus quinquenervis]
                                             Helianthella scabra
                                             Helianthella tenuifolia
                                             Helianthella uniflora
                                               Helianthella uniflora var. douglasii
                                               Helianthella uniflora var. uniflora
                                     Helianthopsis
                                     Helianthus
                                             Helianthus agrestis
                                             Helianthus alienus
                                             Helianthus angustifolius
                                                   [Helianthus angustifolius var. planifolius]
                                             Helianthus annuus
                                                   [Helianthus annuus ssp. jaegeri]
                                                   [Helianthus annuus ssp. lenticularis]
                                                   [Helianthus annuus ssp. texanus]
                                                   [Helianthus annuus var. lenticularis]
                                                   [Helianthus annuus var. macrocarpus]
                                                   [Helianthus annuus var. texanus]
                                                   [Helianthus aridus]
                                                   [Helianthus lenticularis]
                                             Helianthus anomalus
                                             Helianthus argophyllus
                                             Helianthus aristatus
                                             Helianthus arizonensis
                                             Helianthus atrorubens
                                               Helianthus atrorubens var. alsodes
                                               Helianthus atrorubens var. pubescens
                                             Helianthus bolanderi
                                             Helianthus borealis
                                             Helianthus californicus
                                             Helianthus carnosus
                                             Helianthus ciliaris
                                             Helianthus cinereus
                                               Helianthus cinereus var. sullivantii
                                             Helianthus cucumerifolius
                                             Helianthus cusickii
                                             Helianthus debilis
                                               Helianthus debilis ssp. cucumerifolius
                                               Helianthus debilis ssp. debilis
                                               Helianthus debilis ssp. hirtus
                                               Helianthus debilis ssp. praecox
                                               Helianthus debilis ssp. runyonii
                                               Helianthus debilis ssp. silvestris
                                               Helianthus debilis ssp. tardiflorus
                                               Helianthus debilis ssp. vestitus
                                               Helianthus debilis var. cucumerifolius
                                               Helianthus debilis var. silvestris
                                               Helianthus debilis var. tardiflorus
                                               Helianthus debilis var. vestitus
                                             Helianthus decapetalus
                                             Helianthus deserticola
                                             Helianthus divaricatus
                                               Helianthus divaricatus var. angustifolius
                                             Helianthus doronicoides
                                             Helianthus dowellianus
                                             Helianthus eggertii
                                             Helianthus exilis
                                             Helianthus filiformis
                                             Helianthus floridanus
                                             Helianthus formosus
                                             Helianthus giganteus
                                               Helianthus giganteus ssp. alienus
                                               Helianthus giganteus var. subtuberosus
                                             Helianthus glaucophyllus
                                             Helianthus gracilentus
                                             Helianthus grosseserratus
                                                   [Helianthus grosseserratus ssp. maximus]
                                                   [Helianthus grosseserratus var. hypoleucus]
                                                   [Helianthus instabilis]
                                             Helianthus heterophyllus
                                             Helianthus hirsutus
                                                   [Helianthus hirsutus var. stenophyllus]
                                                   [Helianthus hirsutus var. trachyphyllus]
                                                   [Helianthus stenophyllus]
                                             Helianthus invenustus
                                             Helianthus laciniatus
                                                   [Helianthus crenatus]
                                                   [Helianthus heiseri]
                                             Helianthus laetiflorus
                                               Helianthus laetiflorus var. rigidus
                                               Helianthus laetiflorus var. subrhomboideus
                                             Helianthus laevigatus
                                             Helianthus leptocaulis
                                             Helianthus longifolius
                                             Helianthus ludens
                                             Helianthus maximiliani
                                                   [Helianthus dalyi]
                                             Helianthus microcephalus
                                             Helianthus mollis
                                               Helianthus mollis var. cordatus
                                             Helianthus montanus
                                             Helianthus neglectus
                                             Helianthus niveus
                                               Helianthus niveus ssp. canescens
                                                     [Helianthus canescens]
                                                     [Helianthus canus]
                                                     [Helianthus petiolaris var. canescens]
                                               Helianthus niveus ssp. niveus
                                               Helianthus niveus ssp. tephrodes
                                                     [Helianthus tephrodes]
                                             Helianthus nuttallii
                                               Helianthus nuttallii ssp. nuttallii
                                                     [Helianthus fascicularis]
                                                     [Helianthus nuttallii ssp. canadensis]
                                                     [Helianthus nuttallii ssp. coloradensis]
                                               Helianthus nuttallii ssp. parishii
                                               Helianthus nuttallii ssp. rydbergii
                                               Helianthus nuttallii var. rydbergii
                                               Helianthus nuttallii var. subtuberosus
                                             Helianthus occidentalis
                                               Helianthus occidentalis ssp. occidentalis
                                               Helianthus occidentalis ssp. plantagineus
                                               Helianthus occidentalis var. dowellianus
                                               Helianthus occidentalis var. plantagineus
                                             Helianthus oliveri
                                             Helianthus orgyalis
                                             Helianthus paradoxus
                                             Helianthus parishii
                                             Helianthus pauciflorus
                                               Helianthus pauciflorus ssp. pauciflorus
                                               Helianthus pauciflorus ssp. subrhomboideus
                                               Helianthus pauciflorus var. subrhomboideus
                                             Helianthus petiolaris
                                               Helianthus petiolaris ssp. fallax
                                                     [Helianthus petiolaris var. fallax]
                                               Helianthus petiolaris ssp. petiolaris
                                               Helianthus petiolaris var. petiolaris
                                               Helianthus petiolaris var. phenax
                                             Helianthus pilosus
                                             Helianthus porteri
                                             Helianthus praecox
                                               Helianthus praecox ssp. hirtus
                                               Helianthus praecox ssp. praecox
                                               Helianthus praecox ssp. runyonii
                                               Helianthus praecox var. runyonii
                                             Helianthus praetermissus
                                             Helianthus pumilus
                                             Helianthus radula
                                             Helianthus reindutus
                                             Helianthus resinosus
                                             Helianthus rigidus
                                               Helianthus rigidus ssp. laetiflorus
                                               Helianthus rigidus ssp. subrhomboideus
                                               Helianthus rigidus var. subrhomboideus
                                             Helianthus rydbergii
                                             Helianthus salicifolius
                                             Helianthus saxicola
                                             Helianthus scaberrimus
                                             Helianthus schweinitzii
                                             Helianthus scrophulariifolius
                                             Helianthus silphioides
                                             Helianthus simulans
                                             Helianthus smithii
                                             Helianthus strumosus
                                             Helianthus subrhomboideus
                                             Helianthus subtuberosus
                                             Helianthus tracheliifolius
                                             Helianthus tuberosus
                                                   [Helianthus tomentosus]
                                                   [Helianthus tuberosus var. subcanescens]
                                             Helianthus uniflorus
                                             Helianthus validus
                                             Helianthus verticillatus
                                             Helianthus vestitus
                                             Helianthus x ambiguus
                                             Helianthus x brevifolius
                                             Helianthus x cinereus
                                             Helianthus x divariserratus
                                             Helianthus x doronicoides
                                             Helianthus x glaucus
                                             Helianthus x intermedius
                                             Helianthus x kellermanii
                                             Helianthus x laetiflorus
                                             Helianthus x luxurians
                                             Helianthus x multiflorus
                                             Helianthus x orgyaloides
                                             Helianthus x verticillatus
                                     Helichrysum
                                             Helichrysum angustifolium
                                             Helichrysum bracteatum
                                               Helichrysum bracteatum var. viscosum
                                             Helichrysum foetidum
                                             Helichrysum formosissimum
                                             Helichrysum fulgidum
                                             Helichrysum italicum
                                             Helichrysum petiolare
                                             Helichrysum petiolatum
                                             Helichrysum rubicundum
                                             Helichrysum scorpioides
                                             Helichrysum sesamoides
                                     Heliomeris
                                             Heliomeris hispidus
                                                   [Gymnolomia hispida var. ciliata]
                                                   [Gymnolomia hispida]
                                                   [Heliomeris ciliata]
                                                   [Heliomeris hispida]
                                                   [Viguiera ciliata]
                                             Heliomeris longifolia
                                                   [Viguiera longifolia]
                                               Heliomeris longifolia var. annua
                                                     [Heliomeris annua]
                                                     [Viguiera annua]
                                                     [Viguiera longifolia var. annua]
                                               Heliomeris longifolia var. longifolia
                                                     [Gymnolomia longifolia]
                                                     [Viguiera longifolia var. longifolia]
                                             Heliomeris multiflora
                                                   [Viguiera multiflora var. macrocephala]
                                                   [Viguiera multiflora]
                                               Heliomeris multiflora var. brevifolia
                                                     [Viguiera ovalis]
                                               Heliomeris multiflora var. hispida
                                               Heliomeris multiflora var. macrocephala
                                               Heliomeris multiflora var. multiflora
                                               Heliomeris multiflora var. nevadensis
                                                     [Viguiera multiflora var. nevadensis]
                                             Heliomeris porteri
                                             Heliomeris soliceps
                                             Heliomeris tenuifolia
                                     Heliopsis
                                             Heliopsis annua
                                             Heliopsis anomala
                                                   [Encelia anomala]
                                             Heliopsis buphthalmoides
                                             Heliopsis gracilis
                                                   [Heliopsis helianthoides var. gracilis]
                                             Heliopsis helianthoides
                                               Heliopsis helianthoides ssp. occidentalis
                                               Heliopsis helianthoides var. helianthoides
                                               Heliopsis helianthoides var. occidentalis
                                               Heliopsis helianthoides var. scabra
                                                     [Heliopsis helianthoides ssp. scabra]
                                                     [Heliopsis minor]
                                                     [Heliopsis scabra]
                                               Heliopsis helianthoides var. solidaginoides
                                             Heliopsis novogaliciana
                                             Heliopsis oppositifolia
                                             Heliopsis parvifolia
                                               Heliopsis parvifolia var. parvifolia
                                               Heliopsis parvifolia var. rubra
                                             Heliopsis procumbens
                                     Helipterum
                                             Helipterum eximium
                                             Helipterum roseum
                                             Helipterum speciosissimum
                                     Helminthotheca
                                             Helminthotheca echioides
                                     Helogyne
                                             Helogyne apaloidea
                                     Hemiachyris
                                             Hemiachyris texana
                                     Hemibaccharis
                                     Hemizonella
                                             Hemizonella minima
                                     Hemizonia
                                             Hemizonia angustifolia
                                               Hemizonia angustifolia var. barclayi
                                             Hemizonia arida
                                             Hemizonia calyculata
                                             Hemizonia clementina
                                             Hemizonia clevelandii
                                             Hemizonia congdonii
                                             Hemizonia congesta
                                               Hemizonia congesta ssp. calyculata
                                               Hemizonia congesta ssp. clevelandii
                                               Hemizonia congesta ssp. congesta
                                               Hemizonia congesta ssp. leucocephala
                                               Hemizonia congesta ssp. lutescens
                                               Hemizonia congesta ssp. luzulifolia
                                               Hemizonia congesta ssp. tracyi
                                               Hemizonia congesta ssp. vernalis
                                             Hemizonia conjugens
                                             Hemizonia corymbosa
                                               Hemizonia corymbosa ssp. corymbosa
                                               Hemizonia corymbosa ssp. macrocephala
                                             Hemizonia douglasii
                                             Hemizonia fitchii
                                             Hemizonia floribunda
                                             Hemizonia fremontii
                                             Hemizonia grandiflora
                                             Hemizonia greeneana
                                               Hemizonia greeneana ssp. peninsularis
                                             Hemizonia halliana
                                             Hemizonia hispida
                                             Hemizonia increscens
                                               Hemizonia increscens ssp. foliosa
                                               Hemizonia increscens ssp. increscens
                                               Hemizonia increscens ssp. villosa
                                             Hemizonia laevis
                                             Hemizonia leucocephala
                                             Hemizonia lobbii
                                               Hemizonia lobbii ssp. pentactis
                                             Hemizonia lutescens
                                             Hemizonia luzulaefolia
                                               Hemizonia luzulaefolia var. lutescens
                                             Hemizonia luzulifolia
                                               Hemizonia luzulifolia ssp. rudis
                                               Hemizonia luzulifolia ssp. tracyi
                                               Hemizonia luzulifolia var. lutescens
                                             Hemizonia macradenia
                                             Hemizonia martirensis
                                             Hemizonia minthornii
                                             Hemizonia mohavensis
                                             Hemizonia mollis
                                             Hemizonia multicaulis
                                               Hemizonia multicaulis ssp. vernalis
                                             Hemizonia multiglandulosa
                                               Hemizonia multiglandulosa var. sparsa
                                             Hemizonia obconica
                                             Hemizonia oppositifolia
                                             Hemizonia pallida
                                             Hemizonia palmeri
                                             Hemizonia pauciflora
                                             Hemizonia pentactis
                                             Hemizonia perennis
                                             Hemizonia pungens
                                               Hemizonia pungens ssp. laevis
                                               Hemizonia pungens ssp. maritima
                                               Hemizonia pungens ssp. pungens
                                               Hemizonia pungens ssp. septentrionalis
                                               Hemizonia pungens var. septentrionalis
                                             Hemizonia scabrella
                                             Hemizonia spicata
                                             Hemizonia streetsii
                                             Hemizonia tracyi
                                             Hemizonia truncata
                                             Hemizonia vernalis
                                             Hemizonia virgata
                                             Hemizonia wheeleri
                                     Henricksonia
                                             Henricksonia mexicana
                                     Herrickia
                                             Herrickia horrida
                                                   [Eurybia horrida]
                                             Herrickia kingii
                                               Herrickia kingii var. barnebyana
                                               Herrickia kingii var. kingii
                                             Herrickia wasatchensis
                                     Hertia
                                           [Ceratophytum]
                                             Hertia cheirifolia
                                     Hesperevax
                                             Hesperevax acaulis
                                                   [Evax acaulis]
                                               Hesperevax acaulis var. acaulis
                                               Hesperevax acaulis var. ambusticola
                                               Hesperevax acaulis var. robustior
                                             Hesperevax caulescens
                                             Hesperevax sparsiflora
                                               Hesperevax sparsiflora var. brevifolia
                                               Hesperevax sparsiflora var. sparsiflora
                                     Hesperodoria
                                             Hesperodoria hallii
                                     Hesperomannia
                                             Hesperomannia arborescens
                                               Hesperomannia arborescens var. bushiana
                                               Hesperomannia arborescens var. swezeyi
                                             Hesperomannia arbuscula
                                               Hesperomannia arbuscula ssp. oahuensis
                                               Hesperomannia arbuscula var. pearsallii
                                             Hesperomannia lydgatei
                                             Hesperomannia mauiensis
                                     Heteranthemis
                                             Heteranthemis viscidehirta
                                             Heteranthemis viscidihirta
                                     Heterocondylus
                                     Heterolepis
                                             Heterolepis aliena
                                     Heteropappus
                                             Heteropappus altaicus
                                     Heterosperma
                                             Heterosperma coreocarpoides
                                             Heterosperma pinnatum
                                             Heterosperma xanti
                                     Heterospermum
                                             Heterospermum pinnatum
                                     Heterothalamus
                                             Heterothalamus alienus
                                     Heterotheca
                                             Heterotheca adenolepis
                                             Heterotheca aspera
                                             Heterotheca barbata
                                             Heterotheca bolanderi
                                             Heterotheca brandegei
                                             Heterotheca breweri
                                             Heterotheca camphorata
                                             Heterotheca camporum
                                               Heterotheca camporum var. camporum
                                                     [Chrysopsis camporum var. glandulissimum]
                                                     [Chrysopsis camporum]
                                                     [Chrysopsis villosa var. camporum]
                                                     [Heterotheca villosa var. camporum]
                                               Heterotheca camporum var. glandulissima
                                               Heterotheca camporum var. glandulissimum
                                             Heterotheca canescens
                                                   [Chrysopsis berlandieri]
                                                   [Chrysopsis canescens]
                                                   [Chrysopsis villosa var. canescens]
                                             Heterotheca chihuahuana
                                             Heterotheca chrysopsidis
                                             Heterotheca correllii
                                             Heterotheca cruiseana
                                             Heterotheca depressa
                                             Heterotheca echioides
                                             Heterotheca falcata
                                             Heterotheca fastigiata
                                             Heterotheca flexuosa
                                             Heterotheca floridana
                                             Heterotheca fulcrata
                                               Heterotheca fulcrata var. amplifolia
                                                     [Chrysopsis amplifolia]
                                                     [Chrysopsis caudata]
                                                     [Chrysopsis nitidula]
                                               Heterotheca fulcrata var. arizonica
                                               Heterotheca fulcrata var. fulcrata
                                                     [Chrysopsis cryptocephala]
                                                     [Chrysopsis fulcrata]
                                                     [Chrysopsis resinolens]
                                               Heterotheca fulcrata var. senilis
                                                     [Chrysopsis senilis]
                                             Heterotheca graminifolia
                                               Heterotheca graminifolia var. tenuifolia
                                               Heterotheca graminifolia var. tracyi
                                             Heterotheca grandiflora
                                                   [Heterotheca floribunda]
                                             Heterotheca hyssopifolia
                                               Heterotheca hyssopifolia var. gigantea
                                               Heterotheca hyssopifolia var. subulata
                                             Heterotheca inuloides
                                               Heterotheca inuloides var. rosei
                                             Heterotheca jonesii
                                             Heterotheca latisquamea
                                             Heterotheca leptoglossa
                                             Heterotheca marginata
                                             Heterotheca mariana
                                               Heterotheca mariana ssp. floridana
                                               Heterotheca mariana var. macradenia
                                             Heterotheca martirensis
                                             Heterotheca mexicana
                                             Heterotheca microcephala
                                             Heterotheca monarchensis
                                             Heterotheca mucronata
                                               Heterotheca mucronata var. harmsiana
                                             Heterotheca nervosa
                                               Heterotheca nervosa var. microcephala
                                             Heterotheca oligantha
                                             Heterotheca oregona
                                               Heterotheca oregona var. compacta
                                               Heterotheca oregona var. oregona
                                               Heterotheca oregona var. rudis
                                               Heterotheca oregona var. scaberrima
                                             Heterotheca pinifolia
                                             Heterotheca pumila
                                             Heterotheca ruthii
                                             Heterotheca rutteri
                                                   [Chrysopsis rutteri]
                                             Heterotheca scabrella
                                             Heterotheca sessiliflora
                                               Heterotheca sessiliflora ssp. bolanderi
                                               Heterotheca sessiliflora ssp. echioides
                                               Heterotheca sessiliflora ssp. fastigiata
                                               Heterotheca sessiliflora ssp. sessiliflora
                                               Heterotheca sessiliflora var. thiniicola
                                               Heterotheca sessiliflora var. camphorata
                                               Heterotheca sessiliflora var. sanjacintensis
                                             Heterotheca shevockii
                                             Heterotheca stenophylla
                                               Heterotheca stenophylla var. angustifolia
                                               Heterotheca stenophylla var. stenophylla
                                             Heterotheca subaxillaris
                                                   [Chrysopsis scabra]
                                                   [Heterotheca lamarckii]
                                                   [Heterotheca latifolia var. arkansana]
                                                   [Heterotheca latifolia var. macgregoris]
                                                   [Heterotheca latifolia]
                                                   [Heterotheca psammophila]
                                                   [Heterotheca scabra]
                                                   [Heterotheca subaxillaris var. latifolia]
                                                   [Heterotheca subaxillaris var. petiolaris]
                                                   [Heterotheca subaxillaris var. procumbens]
                                                   [Heterotheca subaxillaris var. psammophila]
                                               Heterotheca subaxillaris ssp. latifolia
                                               Heterotheca subaxillaris ssp. subaxillaris
                                             Heterotheca subulata
                                             Heterotheca thiniicola
                                             Heterotheca vandevenderorum
                                             Heterotheca villosa
                                               Heterotheca villosa var. angustifolia
                                               Heterotheca villosa var. ballardii
                                               Heterotheca villosa var. depressa
                                               Heterotheca villosa var. foliosa
                                                     [Chrysopsis butleri]
                                                     [Chrysopsis foliosa]
                                                     [Chrysopsis hirsutissima]
                                                     [Chrysopsis imbricata]
                                                     [Chrysopsis villosa var. foliosa]
                                                     [Heterotheca foliosa]
                                               Heterotheca villosa var. minor
                                                     [Chrysopsis arida]
                                                     [Chrysopsis bakeri]
                                                     [Chrysopsis columbiana]
                                                     [Chrysopsis hispida]
                                                     [Chrysopsis villosa var. hispida]
                                                     [Chrysopsis wisconsinensis]
                                                     [Heterotheca villosa var. hispida]
                                                     [Heterotheca wisconsinensis]
                                               Heterotheca villosa var. nana
                                                     [Chrysopsis canescens var. nana]
                                                     [Chrysopsis horrida]
                                                     [Heterotheca horrida]
                                                     [Heterotheca villosa var. horrida]
                                               Heterotheca villosa var. pedunculata
                                                     [Chrysopsis pedunculata]
                                               Heterotheca villosa var. scabra
                                                     [Chrysopsis viscida ssp. cinerascens]
                                                     [Heterotheca horrida ssp. cinerascens]
                                               Heterotheca villosa var. shevockii
                                               Heterotheca villosa var. sierrablancensis
                                               Heterotheca villosa var. villosa
                                                     [Chrysopsis mollis]
                                                     [Chrysopsis villosa var. glomerata]
                                                     [Chrysopsis villosa var. minor]
                                                     [Chrysopsis villosa var. villosa]
                                                     [Chrysopsis villosa]
                                             Heterotheca viscida
                                                   [Chrysopsis villosa var. viscida]
                                                   [Chrysopsis viscida]
                                             Heterotheca zionensis
                                     Hidalgoa
                                             Hidalgoa ternata
                                     Hieracium
                                             Hieracium abscissum
                                             Hieracium acranthophorum
                                               Hieracium acranthophorum var. isortoquense
                                             Hieracium albertinum
                                             Hieracium albiflorum
                                                   [Chlorocrepis albiflora]
                                                   [Hieracium helleri]
                                                   [Hieracium siskiyouense]
                                             Hieracium alpinum
                                             Hieracium angmagssalikense
                                             Hieracium antarcticum
                                             Hieracium argutum
                                               Hieracium argutum var. parishii
                                             Hieracium argyraeum
                                             Hieracium atratum
                                             Hieracium aurantiacum
                                             Hieracium auricula
                                             Hieracium bifidum
                                             Hieracium bolanderi
                                             Hieracium brevipilum
                                                   [Hieracium fendleri var. mogollense]
                                             Hieracium caespitosum
                                                   [Hieracium pratense]
                                             Hieracium canadense
                                               Hieracium canadense var. canadense
                                               Hieracium canadense var. fasciculatum
                                               Hieracium canadense var. hirtirameum
                                               Hieracium canadense var. kalmii
                                               Hieracium canadense var. subintegrum
                                             Hieracium carneum
                                               Hieracium carneum var. chihuahuense
                                             Hieracium chapacanum
                                             Hieracium crepidispermum
                                                   [Hieracium lemmonii]
                                             Hieracium cusickii
                                             Hieracium cynoglossoides
                                               Hieracium cynoglossoides var. nudicaule
                                             Hieracium devoldii
                                             Hieracium diaphanum
                                             Hieracium dysonymum
                                             Hieracium eugenii
                                             Hieracium fendleri
                                               Hieracium fendleri ssp. fendleri
                                               Hieracium fendleri var. discolor
                                               Hieracium fendleri var. fendleri
                                                     [Chlorocrepis fendleri]
                                               Hieracium fendleri var. ostreophyllum
                                             Hieracium flagellare
                                               Hieracium flagellare ssp. cernuiforme
                                               Hieracium flagellare ssp. glatzense
                                             Hieracium flettii
                                             Hieracium glomeratum
                                             Hieracium gracile
                                               Hieracium gracile var. alaskanum
                                               Hieracium gracile var. densifloccosum
                                               Hieracium gracile var. detonsum
                                               Hieracium gracile var. gracile
                                               Hieracium gracile var. yukonense
                                             Hieracium greenei
                                             Hieracium greenii
                                             Hieracium grinnellii
                                             Hieracium gronovii
                                                   [Hieracium gronovii var. foliosum]
                                             Hieracium horridum
                                             Hieracium kalmii
                                               Hieracium kalmii var. canadense
                                               Hieracium kalmii var. fasciculatum
                                               Hieracium kalmii var. kalmii
                                               Hieracium kalmii var. subintegrum
                                             Hieracium lactucella
                                             Hieracium laevigatum
                                             Hieracium lawsonii
                                             Hieracium longiberbe
                                             Hieracium longipilum
                                             Hieracium maculatum
                                             Hieracium marianum
                                             Hieracium megacephalon
                                             Hieracium megacephalum
                                             Hieracium murorum
                                             Hieracium musartutense
                                             Hieracium nepiocratum
                                             Hieracium nudicaule
                                             Hieracium occidentale
                                             Hieracium paniculatum
                                             Hieracium parryi
                                             Hieracium pennsylvanicum
                                             Hieracium pilosella
                                               Hieracium pilosella var. niveum
                                               Hieracium pilosella var. pilosella
                                             Hieracium piloselloides
                                                   [Hieracium florentinum]
                                             Hieracium praealtum
                                               Hieracium praealtum var. decipiens
                                               Hieracium praealtum var. praealtum
                                             Hieracium prenanthoides
                                             Hieracium pringlei
                                             Hieracium prionobium
                                             Hieracium prionophilum
                                             Hieracium rigorosum
                                               Hieracium rigorosum var. nanusekense
                                               Hieracium rigorosum var. sermilikense
                                               Hieracium rigorosum var. unanakense
                                             Hieracium robinsonii
                                             Hieracium rusbyi
                                             Hieracium sabaudum
                                             Hieracium scabriusculum
                                               Hieracium scabriusculum var. columbianum
                                               Hieracium scabriusculum var. perhirsutum
                                               Hieracium scabriusculum var. saximontanum
                                               Hieracium scabriusculum var. scabrum
                                             Hieracium scabrum
                                               Hieracium scabrum var. intonsum
                                               Hieracium scabrum var. scabrum
                                               Hieracium scabrum var. tonsum
                                             Hieracium schultzii
                                             Hieracium scouleri
                                               Hieracium scouleri var. albertinum
                                               Hieracium scouleri var. griseum
                                               Hieracium scouleri var. nudicaule
                                               Hieracium scouleri var. scouleri
                                             Hieracium scribneri
                                             Hieracium stiptocaule
                                             Hieracium traillii
                                             Hieracium tridentatum
                                             Hieracium triste
                                               Hieracium triste ssp. gracile
                                               Hieracium triste var. fulvum
                                               Hieracium triste var. gracile
                                               Hieracium triste var. triste
                                               Hieracium triste var. tritiforme
                                             Hieracium umbellatum
                                               Hieracium umbellatum var. canadense
                                               Hieracium umbellatum var. scabriusculum
                                             Hieracium ungavense
                                             Hieracium vagum
                                             Hieracium venosum
                                               Hieracium venosum var. nudicaule
                                             Hieracium vulgatum
                                                   [Hieracium lachenalii]
                                             Hieracium wrightii
                                             Hieracium x alleghaniense
                                             Hieracium x atramentarium
                                             Hieracium x brachiatum
                                             Hieracium x dorei
                                             Hieracium x duplex
                                             Hieracium x fassettii
                                               Hieracium x fassettii var. fassettii
                                               Hieracium x fassettii var. mendicum
                                               Hieracium x fassettii var. wisconsinense
                                             Hieracium x fernaldii
                                             Hieracium x flagellare
                                               Hieracium x flagellare var. cernuiforme
                                               Hieracium x flagellare var. flagellare
                                               Hieracium x flagellare var. glatzense
                                             Hieracium x floribundum
                                             Hieracium x fuscatrum
                                             Hieracium x grohii
                                               Hieracium x grohii var. farwellii
                                               Hieracium x grohii var. grohii
                                             Hieracium x macrostolonum
                                             Hieracium x marianum
                                             Hieracium x scribneri
                                     Hippia
                                     Hoehnephytum
                                             Hoehnephytum imbricatum
                                     Hofmeisteria
                                           [Cuspidaria]
                                             Hofmeisteria anomalochaeta
                                             Hofmeisteria crassifolia
                                             Hofmeisteria dissecta
                                             Hofmeisteria fasciculata
                                               Hofmeisteria fasciculata var. fasciculata
                                               Hofmeisteria fasciculata var. pubescens
                                               Hofmeisteria fasciculata var. xantii
                                             Hofmeisteria filifolia
                                             Hofmeisteria gayleana
                                             Hofmeisteria gentryi
                                             Hofmeisteria malvaefolia
                                             Hofmeisteria sinaloensis
                                             Hofmeisteria standleyi
                                             Hofmeisteria urenifolia
                                     Holocarpha
                                             Holocarpha heermannii
                                             Holocarpha macradenia
                                             Holocarpha obconica
                                               Holocarpha obconica ssp. autumnalis
                                               Holocarpha obconica ssp. obconica
                                             Holocarpha virgata
                                               Holocarpha virgata ssp. elongata
                                               Holocarpha virgata ssp. virgata
                                     Holozonia
                                             Holozonia filipes
                                     Hughesia
                                     Hulsea
                                             Hulsea algida
                                             Hulsea brevifolia
                                             Hulsea caespitosa
                                             Hulsea californica
                                             Hulsea callicarpha
                                             Hulsea carnosa
                                             Hulsea heterochroma
                                             Hulsea larsenii
                                             Hulsea mexicana
                                             Hulsea nana
                                               Hulsea nana var. larsenii
                                             Hulsea nevadensis
                                             Hulsea vestita
                                               Hulsea vestita ssp. callicarpha
                                               Hulsea vestita ssp. gabrielensis
                                               Hulsea vestita ssp. inyoensis
                                                     [Hulsea californica ssp. inyoensis]
                                                     [Hulsea inyoensis]
                                               Hulsea vestita ssp. parryi
                                                     [Hulsea parryi]
                                               Hulsea vestita ssp. pygmaea
                                               Hulsea vestita ssp. vestita
                                               Hulsea vestita var. callicarpha
                                               Hulsea vestita var. pygmaea
                                             Hulsea volcanica
                                     Hulteniella
                                             Hulteniella integrifolia
                                     Hyalis
                                             Hyalis argentea
                                     Hyaloseris
                                     Hybridella
                                             Hybridella globosa
                                               Hybridella globosa var. myriophylla
                                     Hydropectis
                                             Hydropectis aquatica
                                             Hydropectis estradii
                                             Hydropectis stevensii
                                     Hymenatherum
                                             Hymenatherum acerosum
                                             Hymenatherum concinnum
                                             Hymenatherum greggii
                                             Hymenatherum hartwegi
                                             Hymenatherum tagetoides
                                             Hymenatherum treculii
                                     Hymenoclea
                                             Hymenoclea sandersonii
                                     Hymenolepis
                                             Hymenolepis parviflora
                                     Hymenopappus
                                             Hymenopappus artemisiaefolius
                                             Hymenopappus artemisiifolius
                                               Hymenopappus artemisiifolius var. artemisiifolius
                                               Hymenopappus artemisiifolius var. riograndensis
                                             Hymenopappus biennis
                                             Hymenopappus carolinensis
                                             Hymenopappus carrizoanus
                                             Hymenopappus corymbosus
                                             Hymenopappus filifolius
                                               Hymenopappus filifolius var. alpestris
                                               Hymenopappus filifolius var. cinereus
                                                     [Hymenopappus arenosus]
                                                     [Hymenopappus cinereus]
                                               Hymenopappus filifolius var. eriopodus
                                                     [Hymenopappus eriopodus]
                                               Hymenopappus filifolius var. filifolius
                                               Hymenopappus filifolius var. idahoensis
                                               Hymenopappus filifolius var. lugens
                                                     [Hymenopappus gloriosus]
                                                     [Hymenopappus lugens]
                                               Hymenopappus filifolius var. luteus
                                                     [Hymenopappus luteus]
                                               Hymenopappus filifolius var. megacephalus
                                               Hymenopappus filifolius var. nanus
                                               Hymenopappus filifolius var. nudipes
                                               Hymenopappus filifolius var. parvulus
                                               Hymenopappus filifolius var. pauciflorus
                                                     [Hymenopappus pauciflorus]
                                               Hymenopappus filifolius var. polycephalus
                                               Hymenopappus filifolius var. tomentosus
                                             Hymenopappus flavescens
                                               Hymenopappus flavescens var. cano-tomentosus
                                               Hymenopappus flavescens var. canotomentosus
                                                     [Hymenopappus robustus]
                                               Hymenopappus flavescens var. flavescens
                                             Hymenopappus flavomarginatus
                                             Hymenopappus mexicanus
                                             Hymenopappus nanus
                                             Hymenopappus newberryi
                                                   [Leucampyx newberryi]
                                             Hymenopappus niveus
                                             Hymenopappus nudatus
                                             Hymenopappus obtusifolius
                                             Hymenopappus ochroleucus
                                             Hymenopappus parvulus
                                             Hymenopappus petaloideus
                                             Hymenopappus polycephalus
                                             Hymenopappus radiata
                                             Hymenopappus radiatus
                                             Hymenopappus scabiosaeus
                                               Hymenopappus scabiosaeus var. artemisiifolius
                                               Hymenopappus scabiosaeus var. corymbosus
                                               Hymenopappus scabiosaeus var. riograndensis
                                               Hymenopappus scabiosaeus var. scabiosaeus
                                             Hymenopappus scaposus
                                             Hymenopappus tenuifolius
                                             Hymenopappus tomentosus
                                     Hymenostephium
                                             Hymenostephium cordatum
                                             Hymenostephium guatemalense
                                             Hymenostephium microcephalum
                                     Hymenothrix
                                             Hymenothrix glandulosa
                                             Hymenothrix loomisii
                                             Hymenothrix palmeri
                                             Hymenothrix wislizeni
                                             Hymenothrix wrightii
                                     Hymenoxys
                                             Hymenoxys ambigens
                                                   [Plummera ambigens]
                                               Hymenoxys ambigens var. ambigens
                                               Hymenoxys ambigens var. floribunda
                                               Hymenoxys ambigens var. neomexicana
                                               Hymenoxys ambigens var. wagneri
                                             Hymenoxys anthemoides
                                             Hymenoxys biennis
                                             Hymenoxys bigelovii
                                                   [Actinella bigelovii]
                                                   [Macdougalia bigelovii]
                                             Hymenoxys brachyactis
                                             Hymenoxys brandegeei
                                                   [Actinella grandiflora var. glabrata]
                                                   [Rydbergia brandegeei]
                                                   [Tetraneuris brandegeei]
                                             Hymenoxys brandegei
                                             Hymenoxys chrysanthemoides
                                               Hymenoxys chrysanthemoides var. excurrens
                                               Hymenoxys chrysanthemoides var. juxta
                                             Hymenoxys cooperi
                                               Hymenoxys cooperi var. canescens
                                                     [Actinea canescens]
                                               Hymenoxys cooperi var. cooperi
                                                     [Actinea cooperi]
                                             Hymenoxys floribunda
                                               Hymenoxys floribunda var. arizonica
                                               Hymenoxys floribunda var. intermedia
                                             Hymenoxys grandiflora
                                                   [Actinella grandiflora]
                                                   [Tetraneuris grandiflora]
                                             Hymenoxys helenioides
                                                   [Picradenia helenioides]
                                             Hymenoxys hoopesii
                                                   [Dugaldia hoopesii]
                                                   [Helenium hoopesii]
                                             Hymenoxys insignis
                                             Hymenoxys jamesii
                                             Hymenoxys lapidicola
                                             Hymenoxys lemmonii
                                             Hymenoxys microcephala
                                                   [Plummera floribunda]
                                             Hymenoxys odorata
                                                   [Actinella odorata]
                                                   [Picradenia odorata]
                                             Hymenoxys quinquesquamata
                                             Hymenoxys richardsonii
                                                   [Actinella richardsonii]
                                               Hymenoxys richardsonii var. floribunda
                                                     [Actinella richardsonii var. floribunda]
                                                     [Hymenoxys olivacea]
                                                     [Hymenoxys richardsonii var. utahensis]
                                                     [Picradenia richardsonii var. floribunda]
                                               Hymenoxys richardsonii var. richardsonii
                                             Hymenoxys rusbyi
                                                   [Actinella rusbyi]
                                             Hymenoxys subintegra
                                             Hymenoxys texana
                                             Hymenoxys vaseyi
                                                   [Actinea vaseyi]
                                                   [Actinella vaseyi]
                                     Hyoseris
                                             Hyoseris minima
                                             Hyoseris virginica
                                     Hypochaeris
                                           [Hypochoeris]
                                             Hypochaeris alba
                                             Hypochaeris brasiliensis
                                               Hypochaeris brasiliensis var. tweediei
                                               Hypochaeris brasiliensis var. tweedyi
                                             Hypochaeris chilensis
                                             Hypochaeris chillensis
                                             Hypochaeris glabra
                                             Hypochaeris incana
                                             Hypochaeris lutea
                                             Hypochaeris microcephala
                                               Hypochaeris microcephala var. albiflora
                                               Hypochaeris microcephala var. microcephala
                                             Hypochaeris radicata
                                             Hypochaeris tweediei
                                             Hypochaeris tweedyi
                                     Hysterionica
                                             Hysterionica bakeri
                                             Hysterionica filiformis
                                     Ichthyothere
                                     Idiopappus
                                     Idiothamnus
                                     Ifloga
                                             Ifloga spicata
                                     Iltisia
                                     Inula
                                             Inula alba
                                             Inula britannica
                                             Inula brittanica
                                             Inula crithmoides
                                             Inula helenium
                                             Inula hookeri
                                             Inula mariana
                                             Inula salicina
                                             Inula viscosa
                                     Iogeton
                                     Ionactis
                                             Ionactis alpina
                                             Ionactis caelestis
                                             Ionactis elegans
                                                   [Chaetopappa elegans]
                                             Ionactis linariifolia
                                             Ionactis linariifolius
                                             Ionactis stenomeres
                                     Iostephane
                                             Iostephane heterophylla
                                             Iostephane madrensis
                                             Iostephane papposa
                                             Iostephane trilobata
                                     Iphiona
                                             Iphiona maris-mortui
                                     Ismelia
                                             Ismelia carinata
                                                   [Glebionis carinatum]
                                     Isocarpha
                                             Isocarpha atriplicifolia
                                               Isocarpha atriplicifolia subsp. atriplicifolia
                                             Isocarpha microcephala
                                             Isocarpha oppositifolia
                                               Isocarpha oppositifolia var. achyranthes
                                     Isocoma
                                             Isocoma acradenia
                                               Isocoma acradenia var. acradenia
                                                     [Haplopappus acradenius ssp. bracteosus]
                                                     [Haplopappus acradenius]
                                               Isocoma acradenia var. bracteosa
                                               Isocoma acradenia var. eremophila
                                                     [Haplopappus acradenius ssp. eremophilus]
                                                     [Isocoma acradenia ssp. eremophila]
                                                     [Isocoma eremophila]
                                             Isocoma arguta
                                             Isocoma azteca
                                             Isocoma bracteosa
                                             Isocoma coronopifolia
                                                   [Isocoma coronopifolia var. pedicellata]
                                                   [Isocoma pedicellata]
                                             Isocoma decumbens
                                             Isocoma drummondii
                                                   [Haplopappus drummondii]
                                                   [Isocoma megalantha]
                                             Isocoma felgeri
                                             Isocoma gypsophila
                                             Isocoma hartwegii
                                             Isocoma heterophylla
                                             Isocoma humilis
                                             Isocoma latifolia
                                             Isocoma leucanthemifolia
                                             Isocoma menziesii
                                               Isocoma menziesii var. decumbens
                                                     [Haplopappus venetus ssp. furfuraceus]
                                                     [Isocoma veneta var. furfuracea]
                                               Isocoma menziesii var. diabolica
                                               Isocoma menziesii var. menziesii
                                               Isocoma menziesii var. sedoides
                                               Isocoma menziesii var. tridentata
                                               Isocoma menziesii var. vernonioides
                                             Isocoma oxyphylla
                                             Isocoma palmeri
                                             Isocoma pluriflora
                                                   [Haplopappus heterophyllus]
                                                   [Haplopappus pluriflorus]
                                                   [Isocoma wrightii]
                                             Isocoma rusbyi
                                                   [Haplopappus rusbyi]
                                             Isocoma tenuisecta
                                                   [Haplopappus tenuisectus]
                                             Isocoma tomentosa
                                             Isocoma veneta
                                                   [Haplopappus venetus ssp. oxyphyllus]
                                                   [Haplopappus venetus ssp. vernonioides]
                                                   [Haplopappus venetus var. argutus]
                                                   [Haplopappus venetus var. hartwegii]
                                                   [Haplopappus venetus var. sedoides]
                                                   [Haplopappus venetus]
                                               Isocoma veneta var. oxyphylla
                                               Isocoma veneta var. sedoides
                                               Isocoma veneta var. vernonioides
                                             Isocoma vernonioides
                                     Isopappus
                                             Isopappus hookerianus
                                             Isopappus validus
                                     Isostigma
                                             Isostigma crithmifolium
                                             Isostigma hoffmannii
                                             Isostigma speciosum
                                     Iva
                                             Iva angustifolia
                                               Iva angustifolia var. latior
                                             Iva annua
                                               Iva annua var. annua
                                               Iva annua var. caudata
                                               Iva annua var. macrocarpa
                                             Iva asperifolia
                                             Iva axillaris
                                                   [Iva axillaris ssp. robustior]
                                                   [Iva axillaris var. robustior]
                                               Iva axillaris var. parvifolia
                                             Iva caudata
                                             Iva cheiranthifolia
                                             Iva ciliata
                                               Iva ciliata var. macrocarpa
                                             Iva dealbata
                                             Iva frutescens
                                               Iva frutescens ssp. frutescens
                                               Iva frutescens ssp. oraria
                                               Iva frutescens var. oraria
                                             Iva hayesiana
                                             Iva imbricata
                                             Iva microcephala
                                             Iva texensis
                                     Ixeris
                                             Ixeris stolonifera
                                     Jacea
                                             Jacea pratensis
                                     Jaegeria
                                             Jaegeria bellidiflora
                                             Jaegeria glabra
                                               Jaegeria glabra var. nana
                                             Jaegeria hirta
                                             Jaegeria macrocephala
                                             Jaegeria pedunculata
                                             Jaegeria petiolaris
                                             Jaegeria purpurascens
                                     Jalcophila
                                     Jaliscoa
                                             Jaliscoa pappifera
                                     Jamesianthus
                                             Jamesianthus alabamensis
                                     Jaumea
                                           [Exarata]
                                             Jaumea carnosa
                                             Jaumea mexicana
                                             Jaumea peduncularis
                                     Jefea
                                             Jefea brevifolia
                                                   [Zexmenia brevifolia]
                                             Jefea lantanifolia
                                     Jensia
                                             Jensia rammii
                                                   [Anisocarpus rammii]
                                             Jensia yosemitana
                                     Jessea
                                             Jessea cooperi
                                     Joseanthus
                                     Jungia
                                             Jungia pringlei
                                     Kalimeris
                                             Kalimeris indica
                                             Kalimeris mongolica
                                     Kanimia
                                     Kaunia
                                             Kaunia rufescens
                                     Keerlia
                                             Keerlia bellidifolia
                                             Keerlia effusa
                                             Keerlia skirrhobasis
                                     Keysseria
                                             Keysseria erici
                                             Keysseria helenae
                                             Keysseria lavandula
                                             Keysseria maviensis
                                     Kingianthus
                                     Kleinia
                                             Kleinia anteuphorbium
                                             Kleinia pendula
                                             Kleinia radicans
                                             Kleinia repens
                                             Kleinia ruderalis
                                             Kleinia stapeliiformis
                                     Koanophyllon
                                             Koanophyllon dolicholepis
                                             Koanophyllon droserolepis
                                             Koanophyllon hylonomum
                                             Koanophyllon monanthum
                                             Koanophyllon palmeri
                                               Koanophyllon palmeri var. palmeri
                                               Koanophyllon palmeri var. tonsum
                                             Koanophyllon polyodon
                                             Koanophyllon sinaloensis
                                             Koanophyllon solidaginifolium
                                                   [Eupatorium solidaginifolium]
                                             Koanophyllon villosum
                                     Koelpinia
                                             Koelpinia linearis
                                     Koyamacalia
                                             Koyamacalia auriculata
                                     Krigia
                                             Krigia biflora
                                               Krigia biflora var. biflora
                                                     [Cynthia virginica]
                                                     [Hyoseris biflora]
                                                     [Krigia amplexicaulis]
                                                     [Krigia biflora ssp. glandulifera]
                                               Krigia biflora var. viridis
                                                     [Cynthia viridis]
                                             Krigia cespitosa
                                                   [Krigia caespitosa]
                                               Krigia cespitosa var. cespitosa
                                               Krigia cespitosa var. gracilis
                                             Krigia dandelion
                                             Krigia montana
                                             Krigia occidentalis
                                             Krigia virginica
                                             Krigia wrightii
                                     Kuhnia
                                             Kuhnia eupatorioides
                                               Kuhnia eupatorioides var. angustifolia
                                               Kuhnia eupatorioides var. corymbulosa
                                               Kuhnia eupatorioides var. floridana
                                               Kuhnia eupatorioides var. gracilis
                                               Kuhnia eupatorioides var. gracillima
                                               Kuhnia eupatorioides var. ozarkana
                                               Kuhnia eupatorioides var. pyramidalis
                                               Kuhnia eupatorioides var. texana
                                             Kuhnia glutinosa
                                             Kuhnia hitchcockii
                                             Kuhnia leptophylla
                                             Kuhnia mosieri
                                             Kuhnia oreithales
                                             Kuhnia rosemarinifolia
                                             Kuhnia rosmarinifolia
                                     Kyhosia
                                             Kyhosia bolanderi
                                     Kyrstenia
                                             Kyrstenia betulaefolia
                                     Lacinaria
                                             Lacinaria aspera
                                               Lacinaria aspera var. spheroidea
                                             Lacinaria boykinii
                                             Lacinaria chapmanii
                                             Lacinaria chlorolepis
                                             Lacinaria cylindracea
                                             Lacinaria elegans
                                             Lacinaria elegantula
                                             Lacinaria flabellata
                                             Lacinaria garberi
                                             Lacinaria gracilis
                                             Lacinaria graminifolia
                                             Lacinaria helleri
                                             Lacinaria laxa
                                             Lacinaria microcephala
                                             Lacinaria nashii
                                             Lacinaria pauciflora
                                             Lacinaria pilosa
                                             Lacinaria punctata
                                             Lacinaria pycnostachya
                                             Lacinaria regimontis
                                             Lacinaria ruthii
                                             Lacinaria scariosa
                                               Lacinaria scariosa var. nieuwlandii
                                             Lacinaria secunda
                                             Lacinaria shortii
                                             Lacinaria smallii
                                             Lacinaria spicata
                                             Lacinaria squarrosa
                                               Lacinaria squarrosa var. intermedia
                                             Lacinaria tenuifolia
                                             Lacinaria tracyi
                                     Lactuca
                                             Lactuca biennis
                                                   [Lactuca spicata var. integrifolia]
                                                   [Lactuca spicata]
                                                   [Mulgedium spicatum var. integrifolium]
                                                   [Mulgedium spicatum]
                                             Lactuca canadensis
                                                   [Lactuca canadensis var. integrifolia]
                                                   [Lactuca canadensis var. latifolia]
                                                   [Lactuca canadensis var. longifolia]
                                                   [Lactuca canadensis var. obovata]
                                                   [Lactuca canadensis var. typica]
                                                   [Lactuca sagittifolia]
                                                   [Lactuca steelei]
                                             Lactuca floridana
                                               Lactuca floridana var. floridana
                                               Lactuca floridana var. villosa
                                                     [Lactuca villosa]
                                                     [Mulgedium villosum]
                                             Lactuca graminifolia
                                               Lactuca graminifolia var. arizonica
                                               Lactuca graminifolia var. graminifolia
                                               Lactuca graminifolia var. mexicana
                                             Lactuca hirsuta
                                               Lactuca hirsuta var. albiflora
                                               Lactuca hirsuta var. hirsuta
                                               Lactuca hirsuta var. sanguinea
                                             Lactuca indica
                                             Lactuca integrifolia
                                             Lactuca intybacea
                                             Lactuca ludoviciana
                                                   [Lactuca campestris var. typica]
                                                   [Lactuca campestris]
                                             Lactuca saligna
                                                   [Lactuca saligna var. runcinata]
                                             Lactuca sativa
                                                   [Lactuca scariola var. integrata]
                                                   [Lactuca scariola var. integrifolia]
                                             Lactuca serriola
                                                   [Lactuca scariola]
                                               Lactuca serriola var. integrata
                                             Lactuca stolonifera
                                             Lactuca viminea
                                             Lactuca virosa
                                             Lactuca x morssii
                                     Laennecia
                                             Laennecia chihuahuana
                                             Laennecia confusa
                                             Laennecia coulteri
                                                   [Conyza coulteri var. virgata]
                                                   [Conyza coulteri]
                                                   [Eschenbachia coulteri]
                                             Laennecia eriophylla
                                                   [Conyza eriophylla]
                                                   [Erigeron eriophyllus]
                                             Laennecia filaginoides
                                             Laennecia gnaphalioides
                                             Laennecia pimana
                                             Laennecia schiedeana
                                                   [Conyza schiedeana]
                                                   [Erigeron schiedeanus]
                                                   [Leptilon integrifolium]
                                             Laennecia sophiifolia
                                                   [Conyza coulteri var. tenuisecta]
                                                   [Conyza sophiifolia]
                                                   [Eschenbachia tenuisecta]
                                             Laennecia spellenbergii
                                             Laennecia turnerorum
                                     Laestadia
                                     Lagascea
                                             Lagascea angustifolia
                                             Lagascea aurea
                                             Lagascea decipiens
                                               Lagascea decipiens var. decipiens
                                               Lagascea decipiens var. glandulosa
                                             Lagascea helianthifolia
                                               Lagascea helianthifolia var. adenocaulis
                                               Lagascea helianthifolia var. levior
                                             Lagascea heteropappus
                                             Lagascea mollis
                                                   [Nocca mollis]
                                             Lagascea rigida
                                             Lagascea rubra
                                     Lagenifera
                                             Lagenifera erici
                                             Lagenifera helenae
                                             Lagenifera maviensis
                                     Lagenophora
                                             Lagenophora viridis
                                     Laggera
                                             Laggera pterodonta
                                     Lagophylla
                                             Lagophylla congesta
                                             Lagophylla dichotoma
                                               Lagophylla dichotoma ssp. minor
                                             Lagophylla glandulosa
                                               Lagophylla glandulosa ssp. serrata
                                             Lagophylla minor
                                             Lagophylla ramosissima
                                               Lagophylla ramosissima ssp. congesta
                                               Lagophylla ramosissima ssp. ramosissima
                                             Lagophylla scabrella
                                     Laphamia
                                             Laphamia angustifolia
                                               Laphamia angustifolia ssp. laciniata
                                             Laphamia bisetosa
                                             Laphamia cinerea
                                             Laphamia dissecta
                                             Laphamia halimifolia
                                               Laphamia halimifolia ssp. lindheimeri
                                             Laphamia inyoensis
                                             Laphamia megalocephala
                                             Laphamia rotundata
                                             Laphamia rupestris
                                             Laphamia staurophylla
                                             Laphamia villosa
                                     Lappa
                                     Lapsana
                                             Lapsana apogonoides
                                             Lapsana communis
                                     Lapsanastrum
                                             Lapsanastrum apogonoides
                                     Lasallea
                                             Lasallea adnata
                                             Lasallea caroliniana
                                             Lasallea concolor
                                             Lasallea grandiflora
                                             Lasallea walteri
                                             Lasallea x amethystina
                                     Lasianthaea
                                             Lasianthaea aurea
                                             Lasianthaea calva
                                             Lasianthaea ceanothifolia
                                               Lasianthaea ceanothifolia var. gracilis
                                               Lasianthaea ceanothifolia var. gradata
                                               Lasianthaea ceanothifolia var. verbenifolia
                                             Lasianthaea crocea
                                             Lasianthaea fruticosa
                                               Lasianthaea fruticosa var. alamosana
                                               Lasianthaea fruticosa var. fasciculata
                                               Lasianthaea fruticosa var. michoacana
                                               Lasianthaea fruticosa var. occidentalis
                                             Lasianthaea gentryi
                                             Lasianthaea guatemalensis
                                             Lasianthaea helianthoides
                                             Lasianthaea jaliscensis
                                             Lasianthaea macrocephala
                                             Lasianthaea palmeri
                                             Lasianthaea podocephala
                                                   [Verbesina podocephala]
                                                   [Zexmenia podocephala]
                                             Lasianthaea seemannii
                                             Lasianthaea squarrosa
                                     Lasiocephalus
                                     Lasiorrhiza
                                     Lasiospermum
                                             Lasiospermum bipinnatum
                                             Lasiospermum radiatum
                                     Lasthenia
                                             Lasthenia burkei
                                             Lasthenia californica
                                                   [Baeria chrysostoma ssp. gracilis]
                                                   [Baeria chrysostoma ssp. hirsutula]
                                                   [Baeria chrysostoma var. gracilis]
                                                   [Baeria chrysostoma]
                                                   [Baeria hirsutula]
                                                   [Lasthenia chrysostoma]
                                               Lasthenia californica ssp. bakeri
                                               Lasthenia californica ssp. californica
                                               Lasthenia californica ssp. macrantha
                                             Lasthenia chrysantha
                                             Lasthenia conjugens
                                             Lasthenia coronaria
                                                   [Baeria californica]
                                             Lasthenia debilis
                                             Lasthenia ferrisiae
                                             Lasthenia fremontii
                                             Lasthenia glaberrima
                                             Lasthenia glabrata
                                               Lasthenia glabrata ssp. coulteri
                                               Lasthenia glabrata ssp. glabrata
                                               Lasthenia glabrata var. coulteri
                                             Lasthenia gracilis
                                             Lasthenia leptalea
                                             Lasthenia macrantha
                                               Lasthenia macrantha ssp. bakeri
                                               Lasthenia macrantha ssp. macrantha
                                               Lasthenia macrantha ssp. prisca
                                             Lasthenia maritima
                                             Lasthenia microglossa
                                             Lasthenia minor
                                                   [Baeria minor]
                                                   [Baeria uliginosa]
                                               Lasthenia minor ssp. maritima
                                               Lasthenia minor var. maritima
                                             Lasthenia ornduffii
                                             Lasthenia platycarpha
                                     Launaea
                                             Launaea capitata
                                             Launaea cornuta
                                             Launaea foxii
                                             Launaea intybacea
                                             Launaea nudicaulis
                                     Layia
                                             Layia carnosa
                                             Layia chrysanthemoides
                                               Layia chrysanthemoides ssp. maritima
                                             Layia discoidea
                                             Layia fremontii
                                             Layia gaillardioides
                                             Layia glandulosa
                                                   [Layia glandulosa ssp. lutea]
                                             Layia graveolens
                                             Layia heterotricha
                                             Layia hieracioides
                                                   [Layia paniculata]
                                             Layia jonesii
                                             Layia leucopappa
                                             Layia munzii
                                             Layia pentachaeta
                                               Layia pentachaeta ssp. albida
                                               Layia pentachaeta ssp. pentachaeta
                                               Layia pentachaeta var. hansenii
                                             Layia platyglossa
                                                   [Layia platyglossa ssp. campestris]
                                                   [Layia platyglossa var. breviseta]
                                                   [Layia ziegleri]
                                             Layia septentrionalis
                                     Lebetina
                                             Lebetina cooperi
                                     Lecocarpus
                                     Lefrovia
                                     Leibnitzia
                                             Leibnitzia lyrata
                                                   [Chaptalia alsophila]
                                                   [Chaptalia leucocephala]
                                                   [Chaptalia seemannii]
                                                   [Leibnitzia seemannii]
                                             Leibnitzia occimadrensis
                                     Leiodon
                                             Leiodon latifolius
                                     Lembertia
                                             Lembertia congdonii
                                     Leontodon
                                             Leontodon autumnalis
                                               Leontodon autumnalis ssp. autumnalis
                                               Leontodon autumnalis ssp. pratensis
                                               Leontodon autumnalis var. pratensis
                                             Leontodon danubialis
                                             Leontodon hastilis
                                               Leontodon hastilis var. glabratus
                                               Leontodon hastilis var. vulgaris
                                             Leontodon hirtus
                                                   [Apargia nudicaulis]
                                                   [Leontodon nudicaulis]
                                             Leontodon hispidus
                                               Leontodon hispidus ssp. danubialis
                                               Leontodon hispidus ssp. hispidus
                                               Leontodon hispidus var. glabratus
                                             Leontodon muelleri
                                             Leontodon saxatilis
                                               Leontodon saxatilis ssp. saxatilis
                                               Leontodon saxatilis ssp. longirostris
                                             Leontodon taraxacoides
                                               Leontodon taraxacoides ssp. longirostris
                                               Leontodon taraxacoides ssp. taraxacoides
                                                     [Leontodon leysseri]
                                                     [Leontodon nudicaulis ssp. taraxacoides]
                                     Leontopodium
                                             Leontopodium nanum
                                             Leontopodium pusillum
                                             leontopodium himalayanum
                                     Lepachys
                                             Lepachys mexicana
                                             Lepachys peduncularis
                                               Lepachys peduncularis var. picta
                                     Lepidanthus
                                     Lepidaploa
                                             Lepidaploa araripensis
                                             Lepidaploa sericea
                                     Lepidonia
                                     Lepidophyllum
                                     Lepidospartum
                                             Lepidospartum burgessii
                                             Lepidospartum latisquamum
                                             Lepidospartum squamatum
                                                   [Lepidospartum squamatum var. palmeri]
                                               Lepidospartum squamatum var. obtectum
                                     Lepidotheca
                                     Leptilon
                                     Leptocarpha
                                             Leptocarpha rivularis
                                     Leptopharynx
                                             Leptopharynx trisecta
                                     Leptoseris
                                     Leptosyne
                                             Leptosyne arizonica
                                               Leptosyne arizonica var. pubescens
                                             Leptosyne californica
                                             Leptosyne calliopsidea
                                               Leptosyne calliopsidea var. nana
                                             Leptosyne hamiltonii
                                     Lessingia
                                             Lessingia adenophora
                                             Lessingia arachnoidea
                                             Lessingia bakeri
                                             Lessingia bicolor
                                             Lessingia filaginifolia
                                               Lessingia filaginifolia var. californica
                                             Lessingia germanorum
                                               Lessingia germanorum var. parvula
                                               Lessingia germanorum var. pectinata
                                               Lessingia germanorum var. peirsonii
                                               Lessingia germanorum var. ramulosissima
                                               Lessingia germanorum var. tenuipes
                                               Lessingia germanorum var. tenuis
                                               Lessingia germanorum var. tomentosa
                                             Lessingia glandulifera
                                               Lessingia glandulifera var. glandulifera
                                                     [Lessingia germanorum var. glandulifera]
                                               Lessingia glandulifera var. pectinata
                                               Lessingia glandulifera var. tomentosa
                                               Lessingia glandulifera var. peirsonii
                                             Lessingia heterochroma
                                             Lessingia hololeuca
                                               Lessingia hololeuca var. arachnoidea
                                             Lessingia imbricata
                                             Lessingia lemmonii
                                               Lessingia lemmonii var. lemmonii
                                                     [Lessingia germanorum var. lemmonii]
                                               Lessingia lemmonii var. peirsonii
                                               Lessingia lemmonii var. ramulosissima
                                             Lessingia leptoclada
                                               Lessingia leptoclada var. microcephala
                                               Lessingia leptoclada var. tenuis
                                             Lessingia mendocina
                                             Lessingia micradenia
                                               Lessingia micradenia var. arachnoidea
                                               Lessingia micradenia var. glabrata
                                               Lessingia micradenia var. micradenia
                                             Lessingia nana
                                               Lessingia nana var. caulescens
                                             Lessingia nemaclada
                                               Lessingia nemaclada var. albiflora
                                               Lessingia nemaclada var. mendocina
                                               Lessingia nemaclada var. nemaclada
                                             Lessingia occidentalis
                                             Lessingia pectinata
                                               Lessingia pectinata var. pectinata
                                               Lessingia pectinata var. tenuipes
                                             Lessingia ramulosa
                                               Lessingia ramulosa var. adenophora
                                               Lessingia ramulosa var. glabrata
                                               Lessingia ramulosa var. micradenia
                                               Lessingia ramulosa var. ramulosa
                                               Lessingia ramulosa var. tenuis
                                             Lessingia ramulosissima
                                             Lessingia subspicata
                                             Lessingia tenuis
                                             Lessingia tomentosa
                                             Lessingia virgata
                                               Lessingia virgata var. glomerata
                                               Lessingia virgata var. virgata
                                     Lessingianthus
                                     Leucacantha
                                     Leucampyx
                                     Leucantha
                                     Leucanthemella
                                             Leucanthemella serotina
                                                   [Chrysanthemum serotinum]
                                                   [Leucanthemum serotinum]
                                                   [Tanacetum serotinum]
                                     Leucanthemum
                                             Leucanthemum integrifolium
                                             Leucanthemum lacustre
                                             Leucanthemum maximum
                                             Leucanthemum nipponicum
                                             Leucanthemum paludosum
                                             Leucanthemum vulgare
                                                   [Chrysanthemum leucanthemum var. boecheri]
                                                   [Chrysanthemum leucanthemum var. pinnatifidum]
                                                   [Chrysanthemum leucanthemum]
                                                   [Leucanthemum leucanthemum]
                                                   [Leucanthemum vulgare var. pinnatifidum]
                                             Leucanthemum x superbum
                                     Leucelene
                                     Leuceria
                                     Leucheria
                                             Leucheria candidissima
                                     Leuciva
                                             Leuciva dealbata
                                     Leucopsidium
                                     Leucosyris
                                     Liabellum
                                             Liabellum gentryi
                                     Liabum
                                             Liabum acuminatum
                                             Liabum amplexicaule
                                             Liabum angustissimum
                                             Liabum bourgeaui
                                             Liabum caducifolium
                                             Liabum discolor
                                             Liabum glabrum
                                               Liabum glabrum var. hypoleucum
                                             Liabum polycephalum
                                             Liabum pringlei
                                     Liatris
                                             Liatris acidota
                                                   [Lacinaria acidota]
                                             Liatris aestivalis
                                             Liatris angustifolia
                                             Liatris aspera
                                               Liatris aspera var. aspera
                                               Liatris aspera var. intermedia
                                               Liatris aspera var. salutans
                                             Liatris bebbiana
                                             Liatris borealis
                                             Liatris bracteata
                                             Liatris chapmanii
                                             Liatris cokeri
                                             Liatris compacta
                                             Liatris cylindracea
                                             Liatris cymosa
                                             Liatris densispicata
                                               Liatris densispicata var. densispicata
                                               Liatris densispicata var. interrupta
                                             Liatris earlei
                                             Liatris elegans
                                               Liatris elegans var. bridgesii
                                               Liatris elegans var. carizzana
                                               Liatris elegans var. elegans
                                               Liatris elegans var. flabellata
                                               Liatris elegans var. kralii
                                             Liatris elegantula
                                             Liatris garberi
                                             Liatris gholsonii
                                             Liatris glabrata
                                               Liatris glabrata var. alabamensis
                                             Liatris glandulosa
                                             Liatris gracilis
                                             Liatris graminifolia
                                               Liatris graminifolia var. dubia
                                               Liatris graminifolia var. elegantula
                                               Liatris graminifolia var. lasia
                                               Liatris graminifolia var. racemosa
                                               Liatris graminifolia var. smallii
                                               Liatris graminifolia var. virgata
                                             Liatris helleri
                                             Liatris hirsuta
                                             Liatris laevigata
                                             Liatris lancifolia
                                                   [Lacinaria lancifolia]
                                                   [Liatris kansana]
                                             Liatris ligulistylis
                                                   [Lacinaria ligulistylis]
                                             Liatris microcephala
                                             Liatris mucronata
                                             Liatris novae-angliae
                                               Liatris novae-angliae var. nieuwlandii
                                             Liatris ohlingerae
                                             Liatris oligocephala
                                             Liatris patens
                                             Liatris pauciflora
                                               Liatris pauciflora var. pauciflora
                                               Liatris pauciflora var. secunda
                                             Liatris pilosa
                                               Liatris pilosa var. elegantula
                                               Liatris pilosa var. lasia
                                               Liatris pilosa var. pilosa
                                             Liatris provincialis
                                             Liatris punctata
                                               Liatris punctata var. mexicana
                                               Liatris punctata var. mucronata
                                               Liatris punctata var. nebraskana
                                               Liatris punctata var. punctata
                                               Liatris punctata var. typica
                                             Liatris pycnostachya
                                               Liatris pycnostachya var. lasiophylla
                                               Liatris pycnostachya var. pycnostachya
                                             Liatris regimontis
                                             Liatris savannensis
                                             Liatris scabra
                                             Liatris scariosa
                                               Liatris scariosa var. nieuwlandii
                                               Liatris scariosa var. novae-angliae
                                               Liatris scariosa var. novaeangliae
                                               Liatris scariosa var. scariosa
                                               Liatris scariosa var. squarrulosa
                                               Liatris scariosa var. virginiana
                                             Liatris secunda
                                             Liatris spheroidea
                                             Liatris spicata
                                               Liatris spicata var. racemosa
                                               Liatris spicata var. resinosa
                                               Liatris spicata var. spicata
                                             Liatris squarrosa
                                               Liatris squarrosa var. alabamensis
                                               Liatris squarrosa var. compacta
                                               Liatris squarrosa var. glabrata
                                               Liatris squarrosa var. gracilenta
                                               Liatris squarrosa var. hirsuta
                                               Liatris squarrosa var. squarrosa
                                             Liatris squarrulosa
                                             Liatris tenuifolia
                                               Liatris tenuifolia var. laevigata
                                               Liatris tenuifolia var. quadriflora
                                               Liatris tenuifolia var. tenuifolia
                                             Liatris tenuis
                                             Liatris turgida
                                             Liatris virgata
                                             Liatris x boykinii
                                             Liatris x fallacior
                                             Liatris x freemaniana
                                             Liatris x frostii
                                             Liatris x gladewitzii
                                             Liatris x macdanieliana
                                             Liatris x nieuwlandii
                                             Liatris x ridgwayi
                                             Liatris x steelei
                                             Liatris x weaveri
                                     Lidbeckia
                                             Lidbeckia bipinnata
                                     Ligularia
                                             Ligularia amplectens
                                             Ligularia dentata
                                             Ligularia tussilaginea
                                             Ligularia websteri
                                     Lindheimera
                                             Lindheimera texana
                                     Linochilus
                                     Linosyris
                                             Linosyris bolanderi
                                             Linosyris howardii
                                             Linosyris parryi
                                             Linosyris pulchella
                                             Linosyris serrulata
                                             Linosyris viscidiflora
                                               Linosyris viscidiflora var. latifolia
                                               Linosyris viscidiflora var. puberula
                                     Lipochaeta
                                             Lipochaeta acris
                                             Lipochaeta alata
                                               Lipochaeta alata var. acrior
                                               Lipochaeta alata var. pulchrior
                                             Lipochaeta bryanii
                                             Lipochaeta calycosa
                                             Lipochaeta christophersenii
                                             Lipochaeta connata
                                               Lipochaeta connata var. acris
                                               Lipochaeta connata var. connata
                                               Lipochaeta connata var. decurrens
                                               Lipochaeta connata var. lata
                                               Lipochaeta connata var. littoralis
                                             Lipochaeta degeneri
                                             Lipochaeta deltoidea
                                             Lipochaeta dubia
                                             Lipochaeta elliptica
                                             Lipochaeta exigua
                                             Lipochaeta fauriei
                                             Lipochaeta flexuosa
                                             Lipochaeta forbesii
                                               Lipochaeta forbesii var. sherffii
                                             Lipochaeta garberi
                                             Lipochaeta hastata
                                             Lipochaeta heterophylla
                                               Lipochaeta heterophylla var. malvacea
                                               Lipochaeta heterophylla var. molokaiensis
                                             Lipochaeta integrifolia
                                               Lipochaeta integrifolia var. argentea
                                               Lipochaeta integrifolia var. gracilis
                                               Lipochaeta integrifolia var. major
                                               Lipochaeta integrifolia var. megacephala
                                             Lipochaeta intermedia
                                             Lipochaeta kaenaensis
                                             Lipochaeta kahoolawensis
                                             Lipochaeta kamolensis
                                             Lipochaeta kawaihoaensis
                                             Lipochaeta lanceolata
                                             Lipochaeta lavarum
                                               Lipochaeta lavarum var. conferta
                                               Lipochaeta lavarum var. hillebrandiana
                                               Lipochaeta lavarum var. lanaiensis
                                               Lipochaeta lavarum var. longifolia
                                               Lipochaeta lavarum var. maneleana
                                               Lipochaeta lavarum var. ovata
                                               Lipochaeta lavarum var. salicifolia
                                               Lipochaeta lavarum var. scaposa
                                               Lipochaeta lavarum var. skottsbergii
                                               Lipochaeta lavarum var. stearnsii
                                             Lipochaeta lobata
                                               Lipochaeta lobata var. albescens
                                               Lipochaeta lobata var. aprevalliana
                                               Lipochaeta lobata var. denticulata
                                               Lipochaeta lobata var. grossedentata
                                               Lipochaeta lobata var. hastulata
                                               Lipochaeta lobata var. hastulatoides
                                               Lipochaeta lobata var. hosakae
                                               Lipochaeta lobata var. incisior
                                               Lipochaeta lobata var. leptophylla
                                               Lipochaeta lobata var. lobata
                                               Lipochaeta lobata var. makenensis
                                               Lipochaeta lobata var. maunaloensis
                                             Lipochaeta mauiensis
                                             Lipochaeta micrantha
                                               Lipochaeta micrantha var. exigua
                                               Lipochaeta micrantha var. micrantha
                                             Lipochaeta minuscula
                                             Lipochaeta molokiniensis
                                             Lipochaeta nesophila
                                             Lipochaeta niihauensis
                                             Lipochaeta ovata
                                             Lipochaeta perdita
                                             Lipochaeta pinnatifida
                                             Lipochaeta populifolia
                                             Lipochaeta porophila
                                             Lipochaeta profusa
                                               Lipochaeta profusa var. robustior
                                             Lipochaeta remyi
                                             Lipochaeta robusta
                                             Lipochaeta rockii
                                               Lipochaeta rockii var. dissecta
                                               Lipochaeta rockii var. parva
                                               Lipochaeta rockii var. subovata
                                             Lipochaeta scabra
                                             Lipochaeta setosa
                                             Lipochaeta subcordata
                                               Lipochaeta subcordata var. membranacea
                                               Lipochaeta subcordata var. populifolia
                                             Lipochaeta succulenta
                                               Lipochaeta succulenta var. angustata
                                               Lipochaeta succulenta var. barclayi
                                               Lipochaeta succulenta var. decurrens
                                               Lipochaeta succulenta var. trifida
                                             Lipochaeta tenuifolia
                                             Lipochaeta tenuis
                                               Lipochaeta tenuis var. sellingii
                                             Lipochaeta trilobata
                                             Lipochaeta variolosa
                                             Lipochaeta venosa
                                             Lipochaeta vittata
                                             Lipochaeta waimeaensis
                                             Lipochaeta warshauerii
                                             Lipochaeta x procumbens
                                     Litrisa
                                             Litrisa carnosa
                                     Llerasia
                                     Logfia
                                             Logfia arizonica
                                                   [Filago arizonica]
                                             Logfia arvensis
                                             Logfia californica
                                                   [Filago californica]
                                                   [Oglifa californica]
                                             Logfia depressa
                                                   [Filago depressa]
                                             Logfia filaginoides
                                             Logfia gallica
                                                   [Filago gallica]
                                                   [Oglifa gallica]
                                             Logfia minima
                                     Lophopappus
                                     Lorandersonia
                                             Lorandersonia baileyi
                                                   [Chrysothamnus baileyi]
                                                   [Chrysothamnus pulchellus ssp. baileyi]
                                                   [Chrysothamnus pulchellus var. baileyi]
                                                   [Ericameria pulchella ssp. baileyi]
                                             Lorandersonia linifolia
                                                   [Chrysothamnus linifolius]
                                                   [Chrysothamnus viscidiflorus ssp. linifolius]
                                                   [Chrysothamnus viscidiflorus var. linifolius]
                                                   [Ericameria linifolia]
                                             Lorandersonia microcephala
                                             Lorandersonia peirsonii
                                             Lorandersonia pulchella
                                             Lorandersonia salicina
                                                   [Haplopappus salicinus]
                                                   [Hesperodoria salicina]
                                             Lorandersonia spathulata
                                     Lorentzianthus
                                     Loricaria
                                             Loricaria thuyoides
                                     Lowellia
                                     Loxothysanus
                                             Loxothysanus pedunculatus
                                             Loxothysanus sinuatus
                                     Lucilia
                                     Luciliopsis
                                     Luina
                                             Luina hypoleuca
                                             Luina serpentina
                                             Luina stricta
                                     Lundellianthus
                                             Lundellianthus salvinii
                                     Luteidiscus
                                             Luteidiscus calcisabulorus
                                             Luteidiscus capillaris
                                             Luteidiscus rockii
                                     Lycoseris
                                     Lygodesmia
                                             Lygodesmia aphylla
                                             Lygodesmia doloresensis
                                             Lygodesmia entrada
                                             Lygodesmia grandiflora
                                                   [Erythremia grandiflora]
                                                   [Lygodesmia grandiflora var. stricta]
                                               Lygodesmia grandiflora var. arizonica
                                                     [Lygodesmia arizonica]
                                               Lygodesmia grandiflora var. dianthopsis
                                                     [Lygodesmia dianthopsis]
                                               Lygodesmia grandiflora var. doloresensis
                                               Lygodesmia grandiflora var. entrada
                                               Lygodesmia grandiflora var. grandiflora
                                             Lygodesmia juncea
                                               Lygodesmia juncea var. dianthopsis
                                             Lygodesmia ramosissima
                                             Lygodesmia rostrata
                                             Lygodesmia tenuifolia
                                             Lygodesmia texana
                                                   [Lygodesmia aphylla var. texana]
                                     Macdougalia
                                     Machaeranthera
                                             Machaeranthera arenaria
                                             Machaeranthera blephariphylla
                                                   [Aster gymnocephalus]
                                                   [Haplopappus blephariphyllus]
                                                   [Haplopappus gymnocephalus]
                                                   [Machaeranthera correllii]
                                                   [Machaeranthera gymnocephala]
                                             Machaeranthera cognata
                                             Machaeranthera coloradoensis
                                               Machaeranthera coloradoensis var. brandegeei
                                               Machaeranthera coloradoensis var. coloradoensis
                                             Machaeranthera confertifolia
                                             Machaeranthera crispa
                                             Machaeranthera cronquistii
                                             Machaeranthera frutescens
                                             Machaeranthera glabriuscula
                                               Machaeranthera glabriuscula var. confertifolia
                                               Machaeranthera glabriuscula var. villosa
                                             Machaeranthera gypsitherma
                                                   [Aster blepharophyllus]
                                             Machaeranthera gypsophila
                                             Machaeranthera heterocarpa
                                             Machaeranthera juncea
                                                   [Haplopappus junceus]
                                             Machaeranthera kingii
                                               Machaeranthera kingii var. barnebyana
                                             Machaeranthera linearifolia
                                             Machaeranthera parviflora
                                                   [Aster parviflorus]
                                                   [Aster parvulus]
                                                   [Machaeranthera pygmaea]
                                             Machaeranthera restiformis
                                             Machaeranthera riparia
                                                   [Aster riparius]
                                                   [Aster sonorae]
                                                   [Machaeranthera sonorae]
                                             Machaeranthera scabrella
                                                   [Machaeranthera pinnatifida var. scabrella]
                                             Machaeranthera spectabilis
                                             Machaeranthera stenoloba
                                             Machaeranthera tagetina
                                                   [Aster tagetinus]
                                             Machaeranthera tanacetifolia
                                                   [Aster tanacetifolius]
                                                   [Machaeranthera coronopifolia]
                                                   [Machaeranthera parthenium]
                                             Machaeranthera varians
                                             Machaeranthera viscida
                                                   [Haplopappus havardii]
                                                   [Machaeranthera havardii]
                                             Machaeranthera viscosula
                                             Machaeranthera wigginsii
                                     Macrachaenium
                                             Macrachaenium gracile
                                     Macraea
                                     Macronema
                                             Macronema aberrans
                                             Macronema discoidea
                                             Macronema discoideum
                                             Macronema greenei
                                             Macronema imbricata
                                             Macronema lineare
                                               Macronema lineare var. canescens
                                             Macronema obovatum
                                             Macronema obtusum
                                     Macrorhynchus
                                             Macrorhynchus humilis
                                             Macrorhynchus purpureus
                                     Macvaughiella
                                     Madaroglossa
                                             Madaroglossa angustifolia
                                             Madaroglossa elegans
                                             Madaroglossa hirsuta
                                     Madia
                                             Madia anomala
                                             Madia bolanderi
                                             Madia citrigracilis
                                             Madia citriodora
                                             Madia doris-nilesiae
                                             Madia elegans
                                               Madia elegans ssp. densifolia
                                               Madia elegans ssp. elegans
                                               Madia elegans ssp. vernalis
                                               Madia elegans ssp. wheeleri
                                               Madia elegans var. densifolia
                                             Madia exigua
                                             Madia glomerata
                                             Madia gracilis
                                                   [Madia dissitiflora]
                                                   [Madia gracilis ssp. collina]
                                                   [Madia gracilis ssp. pilosa]
                                             Madia hallii
                                             Madia madioides
                                             Madia minima
                                             Madia nutans
                                             Madia nuttallii
                                             Madia radiata
                                             Madia rammii
                                             Madia sativa
                                                   [Madia capitata]
                                                   [Madia sativa ssp. capitata]
                                                   [Madia sativa var. congesta]
                                             Madia stebbinsii
                                             Madia subspicata
                                             Madia tenella
                                             Madia yosemitana
                                     Malacomeris
                                             Malacomeris incanus
                                     Malacothrix
                                             Malacothrix arachnoidea
                                             Malacothrix blairii
                                             Malacothrix californica
                                             Malacothrix clevelandii
                                             Malacothrix coulteri
                                                   [Malacothrix coulteri var. cognata]
                                                   [Zollikoferia elquiensis]
                                             Malacothrix crispifolia
                                             Malacothrix fendleri
                                             Malacothrix floccifera
                                             Malacothrix foliosa
                                               Malacothrix foliosa ssp. crispifolia
                                               Malacothrix foliosa ssp. foliosa
                                               Malacothrix foliosa ssp. philbrickii
                                               Malacothrix foliosa ssp. polycephala
                                               Malacothrix foliosa var. indecora
                                               Malacothrix foliosa var. squalida
                                             Malacothrix glabrata
                                                   [Malacothrix californica var. glabrata]
                                             Malacothrix implicata
                                             Malacothrix incana
                                               Malacothrix incana var. succulenta
                                             Malacothrix indecora
                                             Malacothrix insularis
                                               Malacothrix insularis var. squalida
                                             Malacothrix junakii
                                             Malacothrix obtusa
                                             Malacothrix parviflora
                                             Malacothrix phaeocarpa
                                             Malacothrix polycephala
                                             Malacothrix saxatilis
                                               Malacothrix saxatilis var. arachnoidea
                                               Malacothrix saxatilis var. commutata
                                               Malacothrix saxatilis var. implicata
                                               Malacothrix saxatilis var. saxatilis
                                               Malacothrix saxatilis var. tenuifolia
                                                     [Malacothrix altissima]
                                                     [Malacothrix saxatilis var. altissima]
                                                     [Malacothrix saxatilis var. tenuissima]
                                                     [Malacothrix tenuifolia]
                                             Malacothrix senecioides
                                             Malacothrix similis
                                             Malacothrix sonchoides
                                                   [Leptoseris sonchoides]
                                             Malacothrix sonorae
                                             Malacothrix squalida
                                             Malacothrix stebbinsii
                                                   [Malacothrix clevelandii var. stebbinsii]
                                             Malacothrix succulenta
                                             Malacothrix torreyi
                                                   [Malacothrix sonchoides var. torreyi]
                                             Malacothrix xanti
                                     Mallinoa
                                             Mallinoa corymbosa
                                     Malperia
                                             Malperia tenuis
                                     Mantisalca
                                             Mantisalca salmantica
                                                   [Centaurea salmantica]
                                     Mariana
                                     Marshallia
                                             Marshallia caespitosa
                                               Marshallia caespitosa var. caespitosa
                                               Marshallia caespitosa var. signata
                                             Marshallia graminifolia
                                               Marshallia graminifolia ssp. tenuifolia
                                               Marshallia graminifolia var. cynanthera
                                               Marshallia graminifolia var. graminifolia
                                             Marshallia grandiflora
                                             Marshallia laciniarioides
                                             Marshallia latifolia
                                             Marshallia mohrii
                                             Marshallia obovata
                                               Marshallia obovata var. obovata
                                               Marshallia obovata var. platyphylla
                                               Marshallia obovata var. scaposa
                                             Marshallia ramosa
                                             Marshallia tenuifolia
                                               Marshallia tenuifolia var. graminifolia
                                             Marshallia trinervia
                                             Marshallia williamsonii
                                     Maruta
                                     Matricaria
                                             Matricaria aurea
                                             Matricaria chamomilla
                                                   [Chamomilla chamomilla]
                                                   [Chamomilla recutita]
                                                   [Matricaria chamomilla var. coronata]
                                                   [Matricaria recutita]
                                                   [Matricaria suaveolens]
                                             Matricaria courrantiana
                                             Matricaria discoidea
                                                   [Artemisia matricarioides]
                                                   [Chamomilla suaveolens]
                                                   [Lepidanthus suaveolens]
                                                   [Lepidotheca suaveolens]
                                                   [Matricaria matricarioides]
                                                   [Santolina suaveolens]
                                                   [Tanacetum suaveolens]
                                             Matricaria grandiflora
                                             Matricaria inodora
                                             Matricaria maritima
                                               Matricaria maritima ssp. inodora
                                               Matricaria maritima var. agrestis
                                               Matricaria maritima var. inodora
                                             Matricaria occidentalis
                                                   [Chamomilla occidentalis]
                                             Matricaria perforata
                                             Matricaria prostrata
                                             Matricaria suffruticosa
                                     Mauranthemum
                                             Mauranthemum paludosum
                                     Megalodonta
                                             Megalodonta beckii
                                               Megalodonta beckii var. beckii
                                               Megalodonta beckii var. hendersonii
                                               Megalodonta beckii var. oregonensis
                                     Melampodium
                                             Melampodium americanum
                                             Melampodium appendiculatum
                                             Melampodium arvense
                                             Melampodium australe
                                             Melampodium cinereum
                                               Melampodium cinereum var. cinereum
                                               Melampodium cinereum var. hirtellum
                                               Melampodium cinereum var. ramosissimum
                                             Melampodium cupulatum
                                             Melampodium dicoelocarpum
                                             Melampodium divaricatum
                                             Melampodium gracile
                                             Melampodium humile
                                             Melampodium kunthianum
                                             Melampodium leucanthum
                                               Melampodium leucanthum var. leucanthum
                                             Melampodium longicorne
                                             Melampodium longifolium
                                             Melampodium longipilum
                                             Melampodium microcephalum
                                             Melampodium moctezumum
                                             Melampodium montanum
                                             Melampodium nelsonii
                                             Melampodium oblongifolium
                                             Melampodium perfoliatum
                                                   [Alcina perfoliata]
                                             Melampodium pilosum
                                             Melampodium repens
                                             Melampodium rosei
                                             Melampodium ruderale
                                             Melampodium sericeum
                                                   [Melampodium hispidum]
                                             Melampodium sinaloense
                                             Melampodium sinuatum
                                             Melampodium strigosum
                                             Melampodium tenellum
                                             Melampodium tepicense
                                     Melanthera
                                             Melanthera angustifolia
                                             Melanthera aspera
                                               Melanthera aspera var. aspera
                                               Melanthera aspera var. glabriuscula
                                             Melanthera calcicola
                                             Melanthera canescens
                                             Melanthera confusa
                                             Melanthera deltoidea
                                             Melanthera ligulata
                                             Melanthera montana
                                             Melanthera nivea
                                                   [Amellus asper f. bicolor]
                                                   [Amellus asper]
                                                   [Bidens nivea]
                                                   [Melanthera carpenteri]
                                                   [Melanthera hastata]
                                             Melanthera parvifolia
                                             Melanthera radiata
                                     Mesadenia
                                             Mesadenia diversifolia
                                             Mesadenia floridana
                                             Mesadenia reniformis
                                             Mesadenia sulcata
                                     Mesanthophora
                                     Mexerion
                                             Mexerion mexicanum
                                     Micropsis
                                             Micropsis dasycarpa
                                     Micropus
                                             Micropus amphibola
                                             Micropus amphibolus
                                             Micropus angustifolius
                                             Micropus californicus
                                                   [Bombycilaena californica var. californica]
                                               Micropus californicus var. californicus
                                               Micropus californicus var. subvestitus
                                             Micropus dasycarpa
                                     Microseris
                                             Microseris acuminata
                                             Microseris alpestris
                                               Microseris aphantocarpha var. mariposana
                                             Microseris attenuata
                                             Microseris bigelovii
                                             Microseris bolanderi
                                             Microseris borealis
                                             Microseris campestris
                                             Microseris decipiens
                                             Microseris douglasii
                                               Microseris douglasii ssp. douglasii
                                               Microseris douglasii ssp. platycarpha
                                                     [Microseris douglasii var. platycarpha]
                                               Microseris douglasii ssp. tenella
                                             Microseris elegans
                                             Microseris howellii
                                             Microseris indivisa
                                             Microseris laciniata
                                               Microseris laciniata ssp. detlingii
                                               Microseris laciniata ssp. laciniata
                                               Microseris laciniata ssp. leptosepala
                                               Microseris laciniata ssp. siskiyouensis
                                             Microseris leucocarpha
                                             Microseris major
                                             Microseris nigrescens
                                             Microseris nutans
                                                   [Ptilocalais nutans]
                                                   [Scorzonella nutans var. major]
                                                   [Scorzonella nutans]
                                               Microseris nutans ssp. siskiyouensis
                                             Microseris paludosa
                                             Microseris proxima
                                             Microseris sylvatica
                                               Microseris sylvatica var. stillmani
                                     Microspermum
                                             Microspermum debile
                                               Microspermum debile var. arsenei
                                     Mikania
                                             Mikania batatifolia
                                             Mikania congesta
                                             Mikania cordata
                                             Mikania cordifolia
                                             Mikania fragilis
                                             Mikania houstoniana
                                             Mikania micrantha
                                             Mikania odoratissima
                                             Mikania pachyphylla
                                             Mikania periplocifolia
                                             Mikania porosa
                                             Mikania pyramidata
                                             Mikania scandens
                                                   [Mikania angulosa]
                                                   [Mikania scandens var. pubescens]
                                                   [Willoughbya heterophylla]
                                             Mikania stevensiana
                                     Milleria
                                             Milleria quinqueflora
                                     Mirasolia
                                             Mirasolia diversifolia
                                     Misbrookea
                                     Mniodes
                                     Molina
                                     Monactis
                                     Monolopia
                                             Monolopia congdonii
                                             Monolopia gracilens
                                             Monolopia lanceolata
                                             Monolopia major
                                             Monolopia minor
                                             Monolopia stricta
                                     Monoptilon
                                             Monoptilon bellidiforme
                                             Monoptilon bellioides
                                     Montagnaea
                                             Montagnaea hibiscifolia
                                     Montanoa
                                             Montanoa arborescens
                                             Montanoa atriplicifolia
                                             Montanoa bipinnatifida
                                             Montanoa frutescens
                                             Montanoa gentryi
                                             Montanoa grandiflora
                                             Montanoa hibiscifolia
                                             Montanoa leucantha
                                               Montanoa leucantha ssp. arborescens
                                               Montanoa leucantha var. arborescens
                                             Montanoa patens
                                             Montanoa revealii
                                             Montanoa schottii
                                             Montanoa speciosa
                                             Montanoa subtruncata
                                             Montanoa tomentosa
                                               Montanoa tomentosa ssp. rosei
                                                     [Montanoa rosei]
                                     Monticalia
                                     Moquinia
                                     Moscharia
                                             Moscharia pinnatifida
                                     Mulgedium
                                             Mulgedium floridanum
                                             Mulgedium pulchellum
                                                   [Lactuca tatarica var. pulchella]
                                                   [Lactuca tatarica]
                                     Munnozia
                                     Munzothamnus
                                             Munzothamnus blairii
                                     Mutisia
                                             Mutisia oligodon
                                             Mutisia subulata
                                     Mycelis
                                             Mycelis muralis
                                                   [Lactuca muralis]
                                     Nabalus
                                             Nabalus albus
                                             Nabalus asperus
                                             Nabalus boottii
                                             Nabalus crepidineus
                                             Nabalus cylindricus
                                             Nabalus integrifolius
                                             Nabalus nanus
                                             Nabalus racemosus
                                             Nabalus roanensis
                                             Nabalus serpentarius
                                             Nabalus trifoliolatus
                                             Nabalus virgatus
                                     Nacrea
                                     Nardophyllum
                                             Nardophyllum armatum
                                             Nardophyllum obtusifolium
                                     Nardosmia
                                             Nardosmia arctica
                                             Nardosmia japonica
                                             Nardosmia vitifolia
                                     Narvalina
                                     Nassauvia
                                             Nassauvia abbreviata
                                             Nassauvia darwinii
                                             Nassauvia dentata
                                             Nassauvia glomerulosa
                                     Neja
                                             Neja marginata
                                                   [Aster grisebachii]
                                     Neocuatrecasia
                                     Neohintonia
                                             Neohintonia monantha
                                     Neomirandea
                                             Neomirandea araliifolia
                                     Neonesomia
                                             Neonesomia palmeri
                                     Nestotus
                                             Nestotus macleanii
                                             Nestotus stenophyllus
                                     Neurolaena
                                             Neurolaena lobata
                                             Neurolaena oaxacana
                                     Nicolletia
                                             Nicolletia edwardsii
                                             Nicolletia occidentalis
                                             Nicolletia trifida
                                     Nipponanthemum
                                             Nipponanthemum nipponicum
                                     Nocca
                                     Nothobaccharis
                                     Nothocalais
                                             Nothocalais alpestris
                                             Nothocalais cuspidata
                                                   [Agoseris cuspidata]
                                                   [Microseris cuspidata]
                                             Nothocalais nigrescens
                                             Nothocalais troximoides
                                                   [Microseris troximoides]
                                                   [Scorzonella troximoides]
                                     Noticastrum
                                     Notoptera
                                             Notoptera scabridula
                                     Novenia
                                     Oblivia
                                     Oclemena
                                             Oclemena acuminata
                                             Oclemena nemoralis
                                             Oclemena reticulata
                                             Oclemena x blakei
                                     Odontotrichum
                                             Odontotrichum globosum
                                             Odontotrichum pachyphyllum
                                             Odontotrichum palmeri
                                     Oedera
                                     Oglifa
                                             Oglifa arvensis
                                             Oglifa minima
                                     Olearia
                                             Olearia allomii
                                             Olearia cheesmanii
                                             Olearia passerinoides
                                     Oligactis
                                     Oliganthes
                                     Oligoneuron
                                             Oligoneuron album
                                             Oligoneuron canescens
                                             Oligoneuron corymbosum
                                               Oligoneuron corymbosum var. humile
                                             Oligoneuron grandiflorum
                                             Oligoneuron houghtonii
                                             Oligoneuron jacksonii
                                             Oligoneuron nitidum
                                             Oligoneuron ohioense
                                             Oligoneuron riddellii
                                             Oligoneuron rigidum
                                               Oligoneuron rigidum var. glabratum
                                               Oligoneuron rigidum var. humile
                                               Oligoneuron rigidum var. rigidum
                                             Oligoneuron x bernardii
                                             Oligoneuron x krotkovii
                                             Oligoneuron x lutescens
                                     Oligosporus
                                             Oligosporus campestris
                                             Oligosporus groenlandicus
                                             Oligosporus pedatifidus
                                     Olivaea
                                             Olivaea leptocarpa
                                     Omalotheca
                                             Omalotheca norvegica
                                             Omalotheca supina
                                             Omalotheca sylvatica
                                     Oncosiphon
                                             Oncosiphon piluliferum
                                                   [Matricaria globifera]
                                             Oncosiphon suffruticosum
                                     Onopordum
                                             Onopordum acanthium
                                               Onopordum acanthium ssp. acanthium
                                             Onopordum illyricum
                                             Onopordum tauricum
                                     Onoseris
                                             Onoseris humboldtiana
                                             Onoseris onoseroides
                                     Oonopsis
                                             Oonopsis engelmanni
                                             Oonopsis engelmannii
                                             Oonopsis foliosa
                                               Oonopsis foliosa var. foliosa
                                               Oonopsis foliosa var. monocephala
                                             Oonopsis multicaulis
                                             Oonopsis wardii
                                     Ophryosporus
                                             Ophryosporus charua
                                             Ophryosporus paradoxus
                                             Ophryosporus triangularis
                                     Oreastrum
                                             Oreastrum elatum
                                     Oreochrysum
                                             Oreochrysum parryi
                                                   [Aster minor]
                                                   [Haplopappus parryi]
                                                   [Solidago parryi]
                                     Oreostemma
                                             Oreostemma alpigenum
                                               Oreostemma alpigenum ssp. haydenii
                                               Oreostemma alpigenum var. alpigenum
                                               Oreostemma alpigenum var. andersonii
                                               Oreostemma alpigenum var. haydenii
                                             Oreostemma elatum
                                             Oreostemma peirsonii
                                     Oriastrum
                                     Oritrophium
                                     Ormenis
                                             Ormenis mixta
                                     Orochaenactis
                                             Orochaenactis thysanocarpha
                                     Orthopappus
                                             Orthopappus angustifolius
                                     Osbertia
                                             Osbertia stolonifera
                                     Osmadenia
                                             Osmadenia tenella
                                                   [Calycadenia tenella]
                                                   [Hemizonia tenella]
                                     Osmia
                                             Osmia borinquensis
                                             Osmia corymbosa
                                             Osmia frustrata
                                             Osmia geraniifolia
                                             Osmia sinuata
                                     Osteospermum
                                             Osteospermum calendulaceum
                                             Osteospermum clandestinum
                                             Osteospermum ecklonis
                                             Osteospermum fruticosum
                                             Osteospermum hyoseroides
                                             Osteospermum imbricatum
                                             Osteospermum muricatum
                                             Osteospermum sinuatum
                                             Osteospermum spinescens
                                     Otanthus
                                             Otanthus maritimus
                                     Oteiza
                                     Othake
                                             Othake macrolepis
                                     Otopappus
                                             Otopappus acuminatus
                                             Otopappus curviflorus
                                             Otopappus microcephalus
                                             Otopappus tequilanus
                                     Oxylobus
                                             Oxylobus arbutifolius
                                             Oxylobus glanduliferus
                                     Oxypappus
                                             Oxypappus scaber
                                     Oxyphyllum
                                             Oxyphyllum ulicinum
                                     Oxytenia
                                             Oxytenia acerosa
                                                   [Iva acerosa]
                                     Oyedaea
                                     Ozothamnus
                                             Ozothamnus diosmifolius
                                     Pachylaena
                                     Packera
                                             Packera anonyma
                                             Packera antennariifolia
                                             Packera aurea
                                             Packera bellidifolia
                                             Packera bernardina
                                             Packera bolanderi
                                               Packera bolanderi var. bolanderi
                                               Packera bolanderi var. harfordii
                                             Packera breweri
                                             Packera buekii
                                             Packera cana
                                                   [Senecio canus]
                                                   [Senecio convallium]
                                                   [Senecio hallii var. discoidea]
                                                   [Senecio hallii]
                                                   [Senecio harbourii]
                                                   [Senecio howellii]
                                                   [Senecio purshianus]
                                             Packera candidissima
                                             Packera cardamine
                                                   [Senecio cardamine]
                                             Packera castoreus
                                                   [Senecio castoreus]
                                             Packera clevelandii
                                             Packera contermina
                                             Packera crocata
                                                   [Senecio crocatus var. wolfii]
                                                   [Senecio crocatus]
                                             Packera cymbalaria
                                             Packera cynthioides
                                                   [Senecio cynthioides]
                                                   [Senecio wrightii]
                                             Packera debilis
                                             Packera dimorphophylla
                                               Packera dimorphophylla ssp. dimorphophylla
                                               Packera dimorphophylla ssp. intermedia
                                               Packera dimorphophylla var. dimorphophylla
                                               Packera dimorphophylla var. intermedia
                                               Packera dimorphophylla var. paysonii
                                             Packera eurycephala
                                               Packera eurycephala var. eurycephala
                                               Packera eurycephala var. lewisrosei
                                             Packera fendleri
                                                   [Senecio fendleri var. lanatus]
                                                   [Senecio fendleri]
                                             Packera fernaldii
                                             Packera flettii
                                             Packera franciscana
                                                   [Senecio franciscanus]
                                             Packera ganderi
                                                   [Senecio ganderi]
                                             Packera glabella
                                                   [Senecio glabellus]
                                                   [Senecio lobatus]
                                             Packera greenei
                                             Packera hartiana
                                                   [Packera quaerens]
                                                   [Senecio hartianus]
                                                   [Senecio quaerens]
                                             Packera hesperia
                                             Packera hyperborealis
                                                   [Senecio hyperborealis]
                                             Packera indecora
                                             Packera ionophylla
                                             Packera layneae
                                             Packera macounii
                                             Packera malmstenii
                                             Packera mancosana
                                             Packera millefolia
                                             Packera millefolium
                                             Packera millelobata
                                                   [Senecio millelobatus]
                                             Packera moresbiensis
                                             Packera multilobata
                                                   [Senecio lynceus var. leucoreus]
                                                   [Senecio lynceus]
                                                   [Senecio multilobatus]
                                                   [Senecio stygius]
                                                   [Senecio thornberi]
                                                   [Senecio uintahensis]
                                             Packera musiniensis
                                             Packera neomexicana
                                               Packera neomexicana var. metcalfei
                                                     [Senecio metcalfei]
                                                     [Senecio neomexicanus var. metcalfei]
                                               Packera neomexicana var. mutabilis
                                                     [Senecio mutabilis]
                                                     [Senecio neomexicanus var. mutabilis]
                                               Packera neomexicana var. neomexicana
                                                     [Senecio eurypterus]
                                                     [Senecio neomexicanus var. griffithsii]
                                                     [Senecio neomexicanus var. neomexicanus]
                                                     [Senecio neomexicanus]
                                                     [Senecio oresbius]
                                                     [Senecio thurberi]
                                               Packera neomexicana var. toumeyi
                                                     [Senecio neomexicanus var. toumeyi]
                                                     [Senecio toumeyi]
                                             Packera obovata
                                                   [Senecio obovatus var. elliottii]
                                                   [Senecio obovatus var. rotundus]
                                                   [Senecio obovatus]
                                                   [Senecio rotundus]
                                             Packera ogotorukensis
                                             Packera pauciflora
                                             Packera paupercula
                                                   [Senecio balsamitae]
                                                   [Senecio crawfordii]
                                                   [Senecio gaspensis var. firmifolius]
                                                   [Senecio gaspensis]
                                                   [Senecio pauperculus var. balsamitae]
                                                   [Senecio pauperculus var. crawfordii]
                                                   [Senecio pauperculus var. firmifolius]
                                                   [Senecio pauperculus var. neoscoticus]
                                                   [Senecio pauperculus var. praelongus]
                                                   [Senecio pauperculus var. thompsoniensis]
                                                   [Senecio pauperculus]
                                                   [Senecio tweedyi]
                                             Packera plattensis
                                                   [Senecio plattensis]
                                                   [Senecio pseudotomentosus]
                                             Packera porteri
                                                   [Ligularia porteri]
                                                   [Senecio porteri]
                                             Packera pseudaurea
                                               Packera pseudaurea ssp. pseudaurea
                                                     [Senecio pseudaureus var. pseudaureus]
                                               Packera pseudaurea var. flavula
                                                     [Packera pseudaurea ssp. flavula]
                                                     [Senecio flavulus]
                                                     [Senecio pseudaureus ssp. flavulus]
                                                     [Senecio pseudaureus var. flavulus]
                                               Packera pseudaurea var. pseudaurea
                                               Packera pseudaurea var. semicordata
                                             Packera quercetorum
                                                   [Senecio quercetorum]
                                             Packera resedifolia
                                             Packera sanguisorboides
                                                   [Senecio sanguisorboides]
                                             Packera schweinitziana
                                             Packera spellenbergii
                                                   [Senecio spellenbergii]
                                             Packera streptanthifolia
                                                   [Packera cymbalarioides]
                                                   [Packera oodes]
                                                   [Packera streptanthifolia var. rubricaulis]
                                                   [Packera streptanthifolia var. streptanthifolia]
                                                   [Senecio acutidens]
                                                   [Senecio adamsii]
                                                   [Senecio aureus var. borealis]
                                                   [Senecio cymbalarioides var. borealis]
                                                   [Senecio cymbalarioides var. suksdorfii]
                                                   [Senecio cymbalarioides]
                                                   [Senecio fulgens]
                                                   [Senecio jonesii]
                                                   [Senecio laetiflorus]
                                                   [Senecio leonardii]
                                                   [Senecio longipetiolatus]
                                                   [Senecio oodes]
                                                   [Senecio pammelii]
                                                   [Senecio platylobus]
                                                   [Senecio rubricaulis]
                                                   [Senecio streptanthifolius var. borealis]
                                                   [Senecio streptanthifolius var. kluanei]
                                                   [Senecio streptanthifolius var. laetiflorus]
                                                   [Senecio streptanthifolius var. oodes]
                                                   [Senecio streptanthifolius var. rubricaulis]
                                                   [Senecio streptanthifolius var. wallowensis]
                                                   [Senecio streptanthifolius]
                                                   [Senecio subcuneatus]
                                                   [Senecio suksdorfii]
                                                   [Senecio wardii]
                                             Packera subnuda
                                               Packera subnuda var. moresbiensis
                                               Packera subnuda var. subnuda
                                             Packera tampicana
                                                   [Senecio greggii]
                                                   [Senecio imparipinnatus]
                                                   [Senecio tampicanus]
                                             Packera texensis
                                             Packera tomentosa
                                                   [Senecio alabamensis]
                                                   [Senecio tomentosus]
                                             Packera tridenticulata
                                                   [Senecio densus]
                                                   [Senecio manitobensis]
                                                   [Senecio tridenticulatus]
                                             Packera umbraculifera
                                             Packera werneriifolia
                                                   [Packera werneriifolia var. alpina]
                                                   [Senecio aureus var. werneriifolius]
                                                   [Senecio molinarius]
                                                   [Senecio muirii]
                                                   [Senecio saxosus var. toiyabensis]
                                                   [Senecio saxosus]
                                                   [Senecio werneriifolius var. alpinus]
                                                   [Senecio werneriifolius var. incertus]
                                                   [Senecio werneriifolius]
                                     Pacourina
                                     Palafoxia
                                             Palafoxia arida
                                               Palafoxia arida var. arida
                                               Palafoxia arida var. gigantea
                                                     [Palafoxia linearis var. gigantea]
                                             Palafoxia callosa
                                                   [Othake callosa]
                                                   [Palafoxia callosa var. bella]
                                                   [Polypteris callosa]
                                             Palafoxia feayi
                                             Palafoxia hookeriana
                                               Palafoxia hookeriana var. hookeriana
                                               Palafoxia hookeriana var. minor
                                             Palafoxia integrifolia
                                             Palafoxia lindenii
                                             Palafoxia linearis
                                               Palafoxia linearis var. glandulosa
                                               Palafoxia linearis var. leucophylla
                                                     [Palafoxia leucophylla]
                                               Palafoxia linearis var. linearis
                                             Palafoxia macrolepis
                                             Palafoxia reverchonii
                                             Palafoxia riograndensis
                                             Palafoxia rosea
                                               Palafoxia rosea var. ambigua
                                               Palafoxia rosea var. macrolepis
                                               Palafoxia rosea var. papposa
                                               Palafoxia rosea var. rosea
                                             Palafoxia sphacelata
                                                   [Othake sphacelata]
                                                   [Polypteris sphacelata]
                                             Palafoxia texana
                                               Palafoxia texana var. ambigua
                                               Palafoxia texana var. macrolepis
                                               Palafoxia texana var. texana
                                     Pallenis
                                             Pallenis spinosa
                                     Pappobolus
                                     Paracalia
                                     Paragynoxys
                                     Paranephelius
                                     Parasenecio
                                             Parasenecio auriculatus
                                     Parastrephia
                                     Parthenice
                                             Parthenice mollis
                                               Parthenice mollis var. mollis
                                               Parthenice mollis var. peninsularis
                                     Parthenium
                                             Parthenium alpinum
                                                   [Bolophyta alpina]
                                             Parthenium argentatum
                                             Parthenium auriculatum
                                             Parthenium bipinnatifidum
                                             Parthenium confertum
                                               Parthenium confertum var. confertum
                                               Parthenium confertum var. divaricatum
                                               Parthenium confertum var. intermedium
                                               Parthenium confertum var. lyratum
                                                     [Parthenium hysterophorus var. lyratum]
                                                     [Parthenium lyratum]
                                               Parthenium confertum var. microcephalum
                                             Parthenium fruticosum
                                             Parthenium hispidum
                                                   [Parthenium integrifolium var. hispidum]
                                                   [Parthenium repens]
                                               Parthenium hispidum var. auriculatum
                                             Parthenium hysterophorus
                                                   [Parthenium lobatum]
                                             Parthenium incanum
                                             Parthenium integrifolium
                                               Parthenium integrifolium var. auriculatum
                                               Parthenium integrifolium var. henryanum
                                               Parthenium integrifolium var. integrifolium
                                               Parthenium integrifolium var. mabryanum
                                             Parthenium ligulatum
                                                   [Bolophyta ligulata]
                                                   [Parthenium alpinum var. ligulatum]
                                             Parthenium lozanianum
                                             Parthenium radfordii
                                             Parthenium rollinsianum
                                             Parthenium schottii
                                             Parthenium tetraneuris
                                                   [Bolophyta tetraneuris]
                                                   [Parthenium alpinum var. tetraneuris]
                                             Parthenium tomentosum
                                               Parthenium tomentosum var. stramonium
                                                     [Parthenium stramonium]
                                     Pascalia
                                             Pascalia glauca
                                     Pectis
                                             Pectis ambigua
                                             Pectis angustifolia
                                               Pectis angustifolia var. angustifolia
                                               Pectis angustifolia var. fastigiata
                                               Pectis angustifolia var. tenella
                                                     [Pectis tenella]
                                             Pectis aquatica
                                             Pectis arenaria
                                             Pectis barberi
                                             Pectis berlandieri
                                               Pectis berlandieri var. palmeri
                                             Pectis bonplandiana
                                             Pectis canescens
                                             Pectis capillaris
                                             Pectis carthusianorum
                                             Pectis ciliaris
                                             Pectis coulteri
                                             Pectis cylindrica
                                                   [Pectis postrata var. cylindrica]
                                                   [Pectis prostrata var. cylindrica]
                                             Pectis decemcarinata
                                             Pectis diffusa
                                             Pectis elongata
                                               Pectis elongata var. floribunda
                                             Pectis exilis
                                             Pectis exserta
                                             Pectis febrifuga
                                             Pectis filipes
                                               Pectis filipes var. filipes
                                               Pectis filipes var. subnuda
                                             Pectis floribunda
                                             Pectis glaucescens
                                             Pectis haenkeana
                                             Pectis holochaeta
                                               Pectis holochaeta var. cana
                                             Pectis humifusa
                                             Pectis imberbis
                                             Pectis incisifolia
                                             Pectis latisquama
                                             Pectis leptocephala
                                             Pectis linearifolia
                                             Pectis linearis
                                             Pectis linifolia
                                               Pectis linifolia var. hirtella
                                               Pectis linifolia var. linifolia
                                               Pectis linifolia var. marginalis
                                             Pectis longipes
                                             Pectis mearnsii
                                             Pectis multiflosculosa
                                             Pectis multiseta
                                               Pectis multiseta var. ambigua
                                             Pectis odorata
                                             Pectis papposa
                                               Pectis papposa var. grandis
                                               Pectis papposa var. papposa
                                             Pectis pimana
                                             Pectis portoricensis
                                             Pectis pringlei
                                             Pectis propetes
                                             Pectis prostrata
                                                   [Pectis multisetosa]
                                                   [Pectis prostrata var. urceolata]
                                             Pectis purpurea
                                               Pectis purpurea var. sonorae
                                             Pectis rusbyi
                                                   [Pectis palmeri]
                                             Pectis sinaloensis
                                             Pectis stenophylla
                                               Pectis stenophylla var. gentryi
                                               Pectis stenophylla var. rosei
                                               Pectis stenophylla var. stenophylla
                                             Pectis taxifolia
                                             Pectis tenuicaulis
                                             Pectis texana
                                             Pectis uniaristata
                                               Pectis uniaristata var. holostemma
                                               Pectis uniaristata var. jangadensis
                                               Pectis uniaristata var. uniaristata
                                             Pectis vandevenderi
                                             Pectis vollmeri
                                             Pectis x floridana
                                     Pelucha
                                             Pelucha trifida
                                     Pentacalia
                                     Pentachaeta
                                             Pentachaeta alsinoides
                                             Pentachaeta aphantochaeta
                                             Pentachaeta aurea
                                             Pentachaeta bellidiflora
                                             Pentachaeta exilis
                                               Pentachaeta exilis ssp. aeolica
                                               Pentachaeta exilis ssp. exilis
                                               Pentachaeta exilis var. aphantochaeta
                                               Pentachaeta exilis var. discoidea
                                               Pentachaeta exilis var. grayi
                                             Pentachaeta fragilis
                                             Pentachaeta laxa
                                             Pentachaeta lyonii
                                             Pentachaeta orcuttii
                                             Pentachaeta paleacea
                                     Pentzia
                                             Pentzia incana
                                                   [Pentzia virgata]
                                             Pentzia lanata
                                             Pentzia sphaerocephala
                                     Perdicium
                                     Perezia
                                             Perezia capitata
                                             Perezia cuernavacana
                                             Perezia hooveri
                                             Perezia lozani
                                             Perezia multiflora
                                               Perezia multiflora ssp. sonchifolia
                                             Perezia palmeri
                                             Perezia paniculata
                                             Perezia recurvata
                                             Perezia sonchifolia
                                     Pereziopsis
                                     Pericallis
                                             Pericallis hybrida
                                     Pericome
                                             Pericome caudata
                                                   [Pericome caudata var. glandulosa]
                                                   [Pericome glandulosa]
                                     Perityle
                                             Perityle aglossa
                                             Perityle ajoensis
                                             Perityle alamosana
                                             Perityle ambrosiifolia
                                             Perityle angustifolia
                                             Perityle aurea
                                             Perityle batopilensis
                                             Perityle bisetosa
                                               Perityle bisetosa var. appressa
                                               Perityle bisetosa var. bisetosa
                                               Perityle bisetosa var. scalaris
                                               Perityle bisetosa var. spathulata
                                             Perityle californica
                                                   [Perityle plumigera]
                                             Perityle canescens
                                             Perityle carmenensis
                                             Perityle cernua
                                                   [Laphamia cernua]
                                             Perityle ciliata
                                             Perityle cinerea
                                             Perityle coahuilensis
                                             Perityle cochisensis
                                                   [Laphamia cochisensis]
                                             Perityle congesta
                                                   [Laphamia congesta]
                                             Perityle cordifolia
                                             Perityle coronopifolia
                                             Perityle crassifolia
                                               Perityle crassifolia var. robusta
                                             Perityle cuneata
                                             Perityle dissecta
                                             Perityle emoryi
                                                   [Perityle emoryi var. nuda]
                                             Perityle fosteri
                                             Perityle gentryi
                                             Perityle gilensis
                                               Perityle gilensis var. gilensis
                                                     [Laphamia gilensis]
                                               Perityle gilensis var. salensis
                                                     [Laphamia gilensis ssp. longilobus]
                                             Perityle gracilis
                                                   [Laphamia fastigiata]
                                                   [Laphamia gracilis]
                                                   [Perityle fastigiata]
                                             Perityle greenei
                                             Perityle halimifolia
                                             Perityle huecoensis
                                             Perityle incana
                                             Perityle incompta
                                             Perityle intricata
                                                   [Laphamia intricata]
                                                   [Laphamia megalocephala ssp. intricata]
                                                   [Perityle megalocephala var. intricata]
                                             Perityle inyoensis
                                             Perityle jaliscana
                                             Perityle lemmonii
                                             Perityle leptoglossa
                                               Perityle leptoglossa ssp. leptoglossa
                                               Perityle leptoglossa ssp. palmeri
                                             Perityle lindheimeri
                                               Perityle lindheimeri var. halimifolia
                                               Perityle lindheimeri var. lindheimeri
                                             Perityle lloydii
                                             Perityle lobata
                                             Perityle megalocephala
                                               Perityle megalocephala var. megalocephala
                                               Perityle megalocephala var. oligophylla
                                             Perityle microcephala
                                             Perityle microglossa
                                                   [Perityle spilanthoides]
                                               Perityle microglossa var. microglossa
                                               Perityle microglossa var. saxosa
                                             Perityle montana
                                             Perityle nuda
                                             Perityle palmeri
                                             Perityle parryi
                                             Perityle quinqueflora
                                                   [Laphamia quinqueflora]
                                             Perityle reinana
                                             Perityle rotundata
                                             Perityle rupestris
                                               Perityle rupestris var. albiflora
                                               Perityle rupestris var. rupestris
                                             Perityle saxicola
                                                   [Laphamia saxicola]
                                             Perityle specuicola
                                             Perityle stansburii
                                                   [Laphamia stansburii]
                                                   [Laphamia stansburyi]
                                                   [Perityle stansburyi]
                                             Perityle staurophylla
                                               Perityle staurophylla var. homoflora
                                               Perityle staurophylla var. staurophylla
                                             Perityle tenella
                                                   [Laphamia palmeri var. tenella]
                                                   [Laphamia palmeri]
                                             Perityle trichodonta
                                             Perityle turneri
                                             Perityle vandevenderi
                                             Perityle vaseyi
                                             Perityle vigilans
                                             Perityle villosa
                                             Perityle vitreomontana
                                             Perityle warnockii
                                     Perymenium
                                             Perymenium basaseachicanum
                                             Perymenium buphthalmoides
                                               Perymenium buphthalmoides var. sonoranum
                                               Perymenium buphthalmoides var. tenellum
                                             Perymenium cualense
                                             Perymenium discolor
                                             Perymenium ghiesbreghtii
                                             Perymenium globosum
                                             Perymenium gracile
                                             Perymenium lancifolium
                                             Perymenium macrocephalum
                                             Perymenium mendezii
                                               Perymenium mendezii var. angustifolium
                                               Perymenium mendezii var. mendezii
                                               Perymenium mendezii var. verbesinoides
                                             Perymenium oxycarphum
                                             Perymenium pringlei
                                               Perymenium pringlei var. croceum
                                               Perymenium pringlei var. lancifolium
                                             Perymenium purpusii
                                             Perymenium stenophyllum
                                             Perymenium uxoris
                                             Perymenium wilburorum
                                     Petasites
                                             Petasites alaskanus
                                             Petasites arcticus
                                             Petasites corymbosus
                                             Petasites dentatus
                                             Petasites frigidus
                                               Petasites frigidus ssp. arcticus
                                               Petasites frigidus ssp. nivalis
                                               Petasites frigidus ssp. palmatus
                                               Petasites frigidus var. corymbosus
                                               Petasites frigidus var. frigidus
                                               Petasites frigidus var. hyperboreoides
                                               Petasites frigidus var. nivalis
                                               Petasites frigidus var. palmatus
                                               Petasites frigidus var. sagittatus
                                               Petasites frigidus var. vitifolius
                                               Petasites frigidus var. x_vitifolius
                                             Petasites gracilis
                                             Petasites hookerianus
                                             Petasites hybridus
                                             Petasites hyperboreus
                                             Petasites japonicus
                                             Petasites nivalis
                                               Petasites nivalis ssp. vitifolius
                                             Petasites officinalis
                                             Petasites palmata
                                             Petasites palmatus
                                               Petasites palmatus var. frigidus
                                             Petasites sagittatus
                                             Petasites speciosus
                                             Petasites trigonophylla
                                             Petasites vulgaris
                                             Petasites warrenii
                                             Petasites x vitifolius
                                     Peteravenia
                                     Peucephyllum
                                             Peucephyllum schottii
                                               Peucephyllum schottii var. latisetum
                                     Phaenocoma
                                             Phaenocoma prolifera
                                     Phaethusa
                                             Phaethusa helianthoides
                                             Phaethusa laciniata
                                             Phaethusa occidentalis
                                             Phaethusa virginica
                                     Phagnalon
                                             Phagnalon kotschyi
                                     Phalacraea
                                     Phalacroseris
                                             Phalacroseris bolanderi
                                               Phalacroseris bolanderi var. bolanderi
                                               Phalacroseris bolanderi var. coronata
                                     Philoglossa
                                     Phoebanthus
                                             Phoebanthus grandiflorus
                                             Phoebanthus tenuifolius
                                     Phymaspermum
                                           [Valerioa]
                                             Phymaspermum parvifolium
                                     Picradenia
                                             Picradenia biennis
                                             Picradenia earlei
                                             Picradenia lemmonii
                                             Picradenia richardsonii
                                     Picradeniopsis
                                             Picradeniopsis oppositifolia
                                                   [Bahia oppositifolia]
                                             Picradeniopsis woodhousei
                                                   [Bahia woodhousei]
                                             Picradeniopsis woodhousii
                                     Picris
                                             Picris echioides
                                             Picris hieracioides
                                               Picris hieracioides ssp. hieracioides
                                               Picris hieracioides ssp. kamtschatica
                                               Picris hieracioides var. alpina
                                             Picris kamtschatica
                                             Picris pauciflora
                                             Picris rhagadioloides
                                             Picris sprengeriana
                                     Picrosia
                                     Picrothamnus
                                             Picrothamnus desertorum
                                                   [Artemisia spinescens]
                                     Pilosella
                                           [Vestia]
                                             Pilosella novae-angliae
                                             Pilosella richardsonii
                                     Pinaropappus
                                             Pinaropappus junceus
                                             Pinaropappus parvus
                                             Pinaropappus pooleanus
                                             Pinaropappus roseus
                                               Pinaropappus roseus var. foliosus
                                               Pinaropappus roseus var. maculatus
                                               Pinaropappus roseus var. roseus
                                             Pinaropappus spathulatus
                                               Pinaropappus spathulatus var. chiapensis
                                     Pingraea
                                     Pippenalia
                                             Pippenalia delphinifolia
                                     Piptocarpha
                                             Piptocarpha tetrantha
                                     Piptocoma
                                             Piptocoma acevedoi
                                             Piptocoma antillana
                                             Piptocoma discolor
                                     Piptothrix
                                             Piptothrix areolare
                                             Piptothrix palmeri
                                             Piptothrix pubens
                                     Piqueria
                                             Piqueria laxiflora
                                             Piqueria pilosa
                                             Piqueria triflora
                                             Piqueria trinervia
                                     Pityopsis
                                             Pityopsis adenolepis
                                             Pityopsis aspera
                                               Pityopsis aspera var. adenolepis
                                               Pityopsis aspera var. aspera
                                             Pityopsis falcata
                                             Pityopsis flexuosa
                                             Pityopsis graminifolia
                                               Pityopsis graminifolia var. aequilifolia
                                               Pityopsis graminifolia var. graminifolia
                                               Pityopsis graminifolia var. latifolia
                                               Pityopsis graminifolia var. microcephala
                                               Pityopsis graminifolia var. tenuifolia
                                               Pityopsis graminifolia var. tracyi
                                             Pityopsis microcephala
                                             Pityopsis oligantha
                                             Pityopsis pinifolia
                                             Pityopsis ruthii
                                             Pityopsis tracyi
                                     Plagiocheilus
                                     Plateilema
                                             Plateilema palmeri
                                     Platyschkuhria
                                             Platyschkuhria integrifolia
                                               Platyschkuhria integrifolia var. desertorum
                                                     [Bahia nudicaulis var. desertorum]
                                               Platyschkuhria integrifolia var. integrifolia
                                               Platyschkuhria integrifolia var. oblongifolia
                                                     [Bahia nudicaulis var. oblongifolia]
                                                     [Bahia oblongifolia]
                                                     [Platyschkuhria oblongifolia]
                                               Platyschkuhria integrifolia var. ourolepis
                                                     [Bahia nudicaulis var. ourolepis]
                                                     [Bahia ourolepis]
                                     Plazia
                                             Plazia daphnoides
                                     Plectocephalus
                                             Plectocephalus americanus
                                             Plectocephalus rothrockii
                                     Pleiacanthus
                                             Pleiacanthus spinosus
                                                   [Stephanomeria spinosa]
                                     Pleocarphus
                                             Pleocarphus revolutus
                                     Pleurocoronis
                                             Pleurocoronis gentryi
                                             Pleurocoronis laphamioides
                                                   [Hofmeisteria laphamioides]
                                             Pleurocoronis pluriseta
                                                   [Hofmeisteria pluriseta]
                                     Pluchea
                                             Pluchea absinthioides
                                             Pluchea adnata
                                               Pluchea adnata var. parvifolia
                                             Pluchea baccharis
                                             Pluchea camphorata
                                                   [Pluchea petiolata]
                                                   [Pluchea viscida]
                                             Pluchea carolinensis
                                                   [Conyza carolinensis]
                                                   [Conyza cortesii]
                                                   [Pluchea cortesii]
                                                   [Pluchea symphytifolia]
                                                   [Pluchea x fosbergii]
                                             Pluchea chingoyo
                                             Pluchea foetida
                                               Pluchea foetida var. foetida
                                               Pluchea foetida var. imbricata
                                             Pluchea imbricata
                                             Pluchea indica
                                             Pluchea longifolia
                                             Pluchea odorata
                                               Pluchea odorata var. odorata
                                                     [Conyza odorata]
                                                     [Pluchea purpurascens var. purpurascens]
                                                     [Pluchea purpurascens var. succulenta]
                                                     [Pluchea purpurascens]
                                               Pluchea odorata var. succulenta
                                             Pluchea quitoc
                                             Pluchea rosea
                                             Pluchea sagittalis
                                             Pluchea salicifolia
                                             Pluchea sericea
                                                   [Berthelotia sericea]
                                                   [Polypappus sericeus]
                                                   [Tessaria sericea]
                                             Pluchea suaveolens
                                             Pluchea subdecurrens
                                             Pluchea tenuifolia
                                             Pluchea yucatanensis
                                     Plummera
                                     Podachaenium
                                             Podachaenium chiapanum
                                             Podachaenium eminens
                                     Podanthus
                                             Podanthus mitiqui
                                             Podanthus ovatifolius
                                     Podocoma
                                             Podocoma hieracifolia
                                     Podospermum
                                     Pollalesta
                                     Polyachyrus
                                             Polyachyrus fuscus
                                     Polyanthina
                                     Polymnia
                                             Polymnia canadensis
                                                   [Polymnia canadensis var. radiata]
                                                   [Polymnia radiata]
                                             Polymnia cossatotensis
                                             Polymnia laevigata
                                             Polymnia nervata
                                             Polymnia sonchifolia
                                     Polypappus
                                     Polypteris
                                             Polypteris hookeriana
                                             Polypteris integrifolia
                                             Polypteris rosea
                                     Porophyllum
                                             Porophyllum calcicola
                                             Porophyllum coloratum
                                             Porophyllum confertum
                                             Porophyllum crassifolium
                                             Porophyllum gracile
                                                   [Porophyllum caesium]
                                                   [Porophyllum junciforme]
                                                   [Porophyllum nodosum]
                                                   [Porophyllum putidum]
                                                   [Porophyllum vaseyi]
                                             Porophyllum greggii
                                             Porophyllum leiocarpum
                                                   [Porophyllum macrocephalum var. leiocarpum]
                                             Porophyllum linaria
                                             Porophyllum lindenii
                                             Porophyllum maritimum
                                             Porophyllum pausodynum
                                             Porophyllum pinifolium
                                             Porophyllum porfyreum
                                             Porophyllum porophyllum
                                             Porophyllum pringlei
                                             Porophyllum punctatum
                                             Porophyllum pygmaeum
                                             Porophyllum ruderale
                                                   [Porophyllum ellipticum]
                                               Porophyllum ruderale ssp. ruderale
                                               Porophyllum ruderale var. macrocephalum
                                                     [Porophyllum ruderale ssp. macrocephalum]
                                             Porophyllum scoparium
                                             Porophyllum seemannii
                                             Porophyllum tagetoides
                                             Porophyllum tridentatum
                                             Porophyllum viridiflorum
                                     Praxeliopsis
                                     Praxelis
                                     Prenanthella
                                             Prenanthella exigua
                                                   [Lygodesmia exigua]
                                     Prenanthes
                                             Prenanthes alata
                                                   [Prenanthes lessingii]
                                               Prenanthes alata var. sagittata
                                             Prenanthes alba
                                             Prenanthes altissima
                                                   [Nabalus altissimus]
                                                   [Prenanthes altissima var. cinnamomea]
                                             Prenanthes aspera
                                             Prenanthes autumnalis
                                             Prenanthes barbata
                                             Prenanthes boottii
                                             Prenanthes carrii
                                             Prenanthes crepidinea
                                             Prenanthes cylindrica
                                             Prenanthes exigua
                                             Prenanthes integrifolia
                                             Prenanthes nana
                                             Prenanthes racemosa
                                               Prenanthes racemosa ssp. multiflora
                                               Prenanthes racemosa ssp. racemosa
                                               Prenanthes racemosa var. multiflora
                                               Prenanthes racemosa var. pinnatifida
                                               Prenanthes racemosa var. racemosa
                                             Prenanthes roanensis
                                             Prenanthes sagittata
                                             Prenanthes serpentaria
                                               Prenanthes serpentaria var. barbata
                                             Prenanthes trifoliolata
                                               Prenanthes trifoliolata var. nana
                                             Prenanthes virgata
                                             Prenanthes x mainensis
                                     Prionopsis
                                     Proustia
                                             Proustia cuneifolia
                                             Proustia krugiana
                                             Proustia pyrifolia
                                             Proustia vanillosma
                                     Psacalium
                                             Psacalium amplifolium
                                             Psacalium argutum
                                             Psacalium brachycomum
                                             Psacalium cirsiifolium
                                             Psacalium decompositum
                                                   [Cacalia decomposita]
                                                   [Odontotrichum decompositum]
                                             Psacalium globosum
                                             Psacalium holwayanum
                                             Psacalium napellifolium
                                             Psacalium pachyphyllum
                                             Psacalium palmeri
                                             Psacalium peltatum
                                             Psacalium poculiferum
                                             Psacalium pringlei
                                             Psacalium radulifolium
                                             Psacalium sinuatum
                                             Psacalium tussilaginoides
                                     Psathyrotes
                                             Psathyrotes annua
                                                   [Bulbostylis annua]
                                             Psathyrotes pilifera
                                             Psathyrotes ramosissima
                                                   [Tetradymia ramosissima]
                                     Psathyrotopsis
                                             Psathyrotopsis hintoniorum
                                             Psathyrotopsis scaposa
                                                   [Psathyrotes scaposa]
                                     Psephellus
                                             Psephellus leucophyllus
                                             Psephellus somcheticus
                                     Pseudelephantopus
                                             Pseudelephantopus spicatus
                                             Pseudelephantopus spirilis
                                     Pseudobaccharis
                                     Pseudobahia
                                             Pseudobahia bahiifolia
                                               Pseudobahia bahiifolia var. pinnatifida
                                             Pseudobahia heermannii
                                             Pseudobahia peirsonii
                                     Pseudoclappia
                                             Pseudoclappia arenaria
                                             Pseudoclappia watsonii
                                     Pseudoconyza
                                             Pseudoconyza lyrata
                                             Pseudoconyza viscosa
                                     Pseudognaphalium
                                             Pseudognaphalium affine
                                             Pseudognaphalium arizonicum
                                                   [Gnaphalium arizonicum]
                                             Pseudognaphalium attenuatum
                                                   [Gnaphalium attenuatum var. sylvicola]
                                                   [Gnaphalium attenuatum]
                                             Pseudognaphalium austrotexanum
                                             Pseudognaphalium beneolens
                                             Pseudognaphalium biolettii
                                                   [Gnaphalium bicolor]
                                                   [Pseudognaphalium bicolor]
                                             Pseudognaphalium brachypterum
                                             Pseudognaphalium californicum
                                                   [Gnaphalium californicum]
                                             Pseudognaphalium canescens
                                                   [Gnaphalium canescens]
                                                   [Gnaphalium wrightii]
                                               Pseudognaphalium canescens ssp. beneolens
                                               Pseudognaphalium canescens ssp. canescens
                                                     [Gnaphalium canescens ssp. canescens]
                                               Pseudognaphalium canescens ssp. thermale
                                             Pseudognaphalium chartaceum
                                             Pseudognaphalium domingense
                                             Pseudognaphalium elegans
                                             Pseudognaphalium helleri
                                               Pseudognaphalium helleri ssp. helleri
                                               Pseudognaphalium helleri ssp. micradenium
                                             Pseudognaphalium jaliscense
                                                   [Gnaphalium jaliscense]
                                             Pseudognaphalium leucocephalum
                                                   [Gnaphalium leucocephalum]
                                             Pseudognaphalium luteoalbum
                                                   [Gnaphalium luteo-album]
                                                   [Gnaphalium luteoalbum]
                                             Pseudognaphalium macounii
                                                   [Gnaphalium decurrens]
                                                   [Gnaphalium macounii]
                                             Pseudognaphalium micradenium
                                             Pseudognaphalium microcephalum
                                                   [Pseudognaphalium canescens ssp. microcephalum]
                                             Pseudognaphalium obtusifolium
                                               Pseudognaphalium obtusifolium ssp. obtusifolium
                                               Pseudognaphalium obtusifolium ssp. praecox
                                               Pseudognaphalium obtusifolium ssp. saxicola
                                             Pseudognaphalium pringlei
                                                   [Gnaphalium pringlei]
                                                   [Pseudognaphalium priscum]
                                             Pseudognaphalium ramosissimum
                                             Pseudognaphalium roseum
                                                   [Gnaphalium roseum]
                                             Pseudognaphalium sandwicensium
                                               Pseudognaphalium sandwicensium ssp. hawaiiense
                                               Pseudognaphalium sandwicensium ssp. kilaueanum
                                               Pseudognaphalium sandwicensium ssp. molokaiense
                                               Pseudognaphalium sandwicensium ssp. sandwicensium
                                               Pseudognaphalium sandwicensium var. hawaiiense
                                               Pseudognaphalium sandwicensium var. kilaueanum
                                               Pseudognaphalium sandwicensium var. molokaiense
                                               Pseudognaphalium sandwicensium var. sandwicensium
                                             Pseudognaphalium saxicola
                                             Pseudognaphalium semilanatum
                                             Pseudognaphalium stramineum
                                                   [Gnaphalium chilense var. confertifolium]
                                                   [Gnaphalium chilense]
                                                   [Gnaphalium stramineum]
                                             Pseudognaphalium thermale
                                                   [Pseudognaphalium microcephalum var. thermale]
                                             Pseudognaphalium viscosum
                                                   [Gnaphalium viscosum]
                                     Pseudogynoxys
                                             Pseudogynoxys berlandieri
                                             Pseudogynoxys chenopodioides
                                     Pseudokyrsteniopsis
                                     Pseudonoseris
                                     Psila
                                             Psila spartioides
                                             Psila tenella
                                     Psilactis
                                             Psilactis brevilingulata
                                                   [Machaeranthera brevilingulata]
                                             Psilactis gentryi
                                                   [Machaeranthera mexicana]
                                             Psilactis heterocarpa
                                             Psilactis tenuis
                                                   [Machaeranthera tenuis]
                                     Psilocarphus
                                             Psilocarphus brevissimus
                                               Psilocarphus brevissimus var. brevissimus
                                               Psilocarphus brevissimus var. multiflorus
                                             Psilocarphus caulescens
                                             Psilocarphus chilensis
                                             Psilocarphus elatior
                                             Psilocarphus globiferus
                                             Psilocarphus oregonus
                                             Psilocarphus tenellus
                                               Psilocarphus tenellus var. globiferus
                                               Psilocarphus tenellus var. tenellus
                                               Psilocarphus tenellus var. tenuis
                                     Psilochenia
                                             Psilochenia atribarba
                                             Psilochenia bakeri
                                               Psilochenia bakeri ssp. cusickii
                                               Psilochenia bakeri ssp. idahoensis
                                             Psilochenia modocensis
                                               Psilochenia modocensis ssp. glareosa
                                               Psilochenia modocensis ssp. rostrata
                                               Psilochenia modocensis ssp. subacaulis
                                             Psilochenia monticola
                                             Psilochenia pleurocarpa
                                             Psilochenia runcinata
                                               Psilochenia runcinata ssp. andersonii
                                               Psilochenia runcinata ssp. hallii
                                               Psilochenia runcinata ssp. hispidulosa
                                               Psilochenia runcinata ssp. imbricata
                                     Psilostrophe
                                             Psilostrophe bakeri
                                             Psilostrophe cooperi
                                                   [Riddellia cooperi]
                                             Psilostrophe divaricata
                                             Psilostrophe gnaphalioides
                                             Psilostrophe gnaphalodes
                                             Psilostrophe grandiflora
                                             Psilostrophe hartmanii
                                             Psilostrophe mexicana
                                             Psilostrophe sparsiflora
                                                   [Riddellia tagetina var. sparsiflora]
                                             Psilostrophe tagetina
                                               Psilostrophe tagetina var. tagetina
                                                     [Psilostrophe tagetina var. grandiflora]
                                                     [Psilostrophe tagetina var. lanata]
                                                     [Riddellia tagetina]
                                             Psilostrophe villosa
                                                   [Psilostrophe tagetina var. cerifera]
                                     Pterocaulon
                                             Pterocaulon alopecuroideum
                                             Pterocaulon alopecuroidies
                                             Pterocaulon angustifolium
                                             Pterocaulon purpurascens
                                             Pterocaulon pycnostachyum
                                             Pterocaulon undulatum
                                             Pterocaulon virgatum
                                     Pteronia
                                             Pteronia adenocarpa
                                     Pterophyton
                                             Pterophyton aristatum
                                             Pterophyton helianthoides
                                             Pterophyton heterophyllum
                                             Pterophyton pauciflorum
                                     Ptilocalais
                                             Ptilocalais macrolepis
                                             Ptilocalais major
                                     Ptilomeris
                                             Ptilomeris mutica
                                     Ptiloria
                                             Ptiloria neomexicana
                                             Ptiloria ramosa
                                     Pugiopappus
                                     Pulicaria
                                             Pulicaria arabica
                                             Pulicaria crispa
                                             Pulicaria desertorum
                                             Pulicaria dysenterica
                                                   [Inula dysenterica]
                                             Pulicaria paludosa
                                                   [Pulicaria hispanica]
                                     Pyrethrum
                                             Pyrethrum anethifolium
                                             Pyrethrum cinerariifolium
                                     Pyrrhopappus
                                             Pyrrhopappus carolinianus
                                                   [Pyrrhopappus carolinianus var. georgianus]
                                                   [Pyrrhopappus georgianus]
                                                   [Sitilias caroliniana]
                                             Pyrrhopappus grandiflorus
                                                   [Pyrrhopappus scaposus]
                                                   [Sitilias grandiflora]
                                             Pyrrhopappus pauciflorus
                                                   [Pyrrhopappus geiseri]
                                                   [Pyrrhopappus multicaulis var. geiseri]
                                                   [Pyrrhopappus multicaulis]
                                                   [Sitilias multicaulis]
                                             Pyrrhopappus rothrockii
                                     Pyrrocoma
                                             Pyrrocoma adsurgens
                                             Pyrrocoma amplectens
                                             Pyrrocoma apargioides
                                             Pyrrocoma carthamoides
                                               Pyrrocoma carthamoides var. carthamoides
                                               Pyrrocoma carthamoides var. cusickii
                                                     [Haplopappus carthamoides ssp. cusickii]
                                                     [Haplopappus carthamoides var. cusickii]
                                               Pyrrocoma carthamoides var. subsquarrosa
                                             Pyrrocoma clementis
                                               Pyrrocoma clementis var. clementis
                                               Pyrrocoma clementis var. villosa
                                             Pyrrocoma congesta
                                             Pyrrocoma crocea
                                               Pyrrocoma crocea var. crocea
                                               Pyrrocoma crocea var. genuflexa
                                                     [Haplopappus croceus var. genuflexus]
                                                     [Pyrrocoma genuflexa]
                                             Pyrrocoma elata
                                             Pyrrocoma gossypina
                                             Pyrrocoma hirta
                                               Pyrrocoma hirta var. hirta
                                               Pyrrocoma hirta var. lanulosa
                                               Pyrrocoma hirta var. sonchifolia
                                             Pyrrocoma insecticruris
                                             Pyrrocoma integrifolia
                                             Pyrrocoma inuloides
                                                   [Haplopappus inuloides]
                                             Pyrrocoma lanceolata
                                               Pyrrocoma lanceolata var. lanceolata
                                               Pyrrocoma lanceolata var. subviscosa
                                             Pyrrocoma lanulosa
                                             Pyrrocoma liatriformis
                                             Pyrrocoma linearis
                                             Pyrrocoma lucida
                                             Pyrrocoma prionophylla
                                             Pyrrocoma racemosa
                                               Pyrrocoma racemosa var. congesta
                                               Pyrrocoma racemosa var. paniculata
                                                     [Haplopappus paniculatus var. virgatus]
                                                     [Haplopappus racemosus ssp. brachycephalus]
                                                     [Haplopappus racemosus ssp. duriuscula]
                                                     [Haplopappus racemosus ssp. glomeratus]
                                                     [Haplopappus racemosus ssp. halophilus]
                                                     [Haplopappus racemosus ssp. prionophyllus]
                                                     [Haplopappus racemosus var. glomerellus]
                                                     [Haplopappus racemosus var. paniculatus]
                                                     [Haplopappus racemosus var. prionophyllus]
                                               Pyrrocoma racemosa var. pinetorum
                                               Pyrrocoma racemosa var. racemosa
                                               Pyrrocoma racemosa var. sessiliflora
                                                     [Haplopappus racemosus ssp. sessiliflorus]
                                                     [Haplopappus racemosus var. sessiliflorus]
                                                     [Pyrrocoma sessiliflora]
                                             Pyrrocoma radiata
                                             Pyrrocoma sonchifolia
                                             Pyrrocoma subcaesia
                                             Pyrrocoma subsquarrosa
                                             Pyrrocoma subviscosa
                                             Pyrrocoma uniflora
                                               Pyrrocoma uniflora var. gossypina
                                               Pyrrocoma uniflora var. uniflora
                                                     [Haplopappus contractus]
                                                     [Haplopappus uniflorus ssp. gossypinus]
                                                     [Haplopappus uniflorus ssp. howellii]
                                                     [Haplopappus uniflorus ssp. linearis]
                                                     [Haplopappus uniflorus ssp. typicus]
                                                     [Haplopappus uniflorus var. howellii]
                                                     [Haplopappus uniflorus]
                                                     [Pyrrocoma howellii]
                                             Pyrrocoma villosa
                                     Quechualia
                                     Rafinesquia
                                             Rafinesquia californica
                                             Rafinesquia neomexicana
                                     Raillardella
                                             Raillardella argentea
                                             Raillardella minima
                                             Raillardella muirii
                                             Raillardella nevadensis
                                             Raillardella pringlei
                                             Raillardella scabrida
                                             Raillardella scaposa
                                     Raillardia
                                             Raillardia argentea
                                     Raillardiopsis
                                             Raillardiopsis muirii
                                             Raillardiopsis scabrida
                                     Railliardia
                                             Railliardia arborea
                                             Railliardia ciliolata
                                               Railliardia ciliolata var. juniperoides
                                               Railliardia ciliolata var. leptocephala
                                               Railliardia ciliolata var. trinervia
                                             Railliardia demissifolia
                                               Railliardia demissifolia var. dolichophylla
                                             Railliardia herbstobatae
                                             Railliardia hillebrandii
                                             Railliardia kohalae
                                             Railliardia latifolia
                                               Railliardia latifolia var. helleri
                                             Railliardia linearis
                                               Railliardia linearis var. opposita
                                             Railliardia lonchophylla
                                               Railliardia lonchophylla var. stipitata
                                             Railliardia menziesii
                                               Railliardia menziesii var. angustifolia
                                             Railliardia molokaiensis
                                               Railliardia molokaiensis var. oppositifolia
                                               Railliardia molokaiensis var. stipitata
                                             Railliardia montana
                                               Railliardia montana var. longifolia
                                               Railliardia montana var. robustior
                                             Railliardia platyphylla
                                               Railliardia platyphylla var. leptophylla
                                               Railliardia platyphylla var. trillioidea
                                             Railliardia reticulata
                                             Railliardia rockii
                                             Railliardia scabra
                                               Railliardia scabra var. leiophylla
                                               Railliardia scabra var. munroi
                                             Railliardia sherffiana
                                               Railliardia sherffiana var. paucinervia
                                             Railliardia struthioloides
                                             Railliardia ternifolia
                                             Railliardia thyrsiflora
                                               Railliardia thyrsiflora var. cernua
                                             Railliardia waianapanapaenis
                                             Railliardia x dolosa
                                             Railliardia x vafra
                                     Railliautia
                                             Railliautia x fallax
                                             Railliautia x fucosa
                                     Rainiera
                                             Rainiera stricta
                                     Ratibida
                                             Ratibida columnifera
                                                   [Lepachys columnaris]
                                                   [Lepachys columnifera]
                                                   [Ratibida columnaris var. pulcherrima]
                                                   [Ratibida columnaris]
                                                   [Rudbeckia columnaris]
                                                   [Rudbeckia columnifera]
                                             Ratibida latipalearis
                                             Ratibida mexicana
                                             Ratibida peduncularis
                                               Ratibida peduncularis var. peduncularis
                                               Ratibida peduncularis var. picta
                                             Ratibida picta
                                             Ratibida pinnata
                                                   [Lepachys pinnata]
                                                   [Rudbeckia pinnata]
                                             Ratibida pulcherrima
                                             Ratibida tagetes
                                                   [Rudbeckia globosa]
                                                   [Rudbeckia tagetes]
                                               Ratibida tagetes var. cinerea
                                     Raulinoreitzia
                                     Rayjacksonia
                                             Rayjacksonia annua
                                                   [Haplopappus annuus]
                                                   [Haplopappus phyllocephalus ssp. annuus]
                                                   [Haplopappus phyllocephalus var. annuus]
                                                   [Machaeranthera annua]
                                                   [Machaeranthera phyllocephala var. annua]
                                                   [Sideranthus annuus]
                                             Rayjacksonia aurea
                                                   [Machaeranthera aurea]
                                             Rayjacksonia phyllocephala
                                                   [Machaeranthera phyllocephala var. megacephala]
                                                   [Machaeranthera phyllocephala]
                                     Reichardia
                                             Reichardia picroides
                                             Reichardia tingitana
                                     Remya
                                             Remya kauaiensis
                                               Remya kauaiensis var. magnifica
                                               Remya kauaiensis var. magnifolia
                                             Remya mauiensis
                                             Remya montgomeryi
                                     Rensonia
                                             Rensonia salvadorica
                                     Rhagadiolus
                                             Rhagadiolus edulis
                                             Rhagadiolus hedypnois
                                             Rhagadiolus stellatus
                                     Rhaponticum
                                             Rhaponticum pusillum
                                     Rhodanthe
                                             Rhodanthe chlorocephala
                                               Rhodanthe chlorocephala ssp. rosea
                                     Rhynchospermum
                                     Rhysolepis
                                             Rhysolepis morelensis
                                     Ridan
                                             Ridan paniculata
                                     Riddellia
                                     Riencourtia
                                     Rigiopappus
                                             Rigiopappus leptocladus
                                     Robinsonia
                                             Robinsonia haldaniana
                                     Roellia
                                             Roellia roellii
                                             Roellia simplex
                                     Rojasianthe
                                     Rolandra
                                             Rolandra fruticosa
                                     Roldana
                                             Roldana barba-johannis
                                             Roldana gentryi
                                             Roldana hartwegii
                                                   [Roldana carlomasonii]
                                                   [Senecio carlomasonii]
                                                   [Senecio hartwegii]
                                                   [Senecio seemanii]
                                             Roldana heracleifolia
                                             Roldana jurgensenii
                                             Roldana lineolata
                                             Roldana petasitis
                                             Roldana platanifolia
                                             Roldana sessilifolia
                                             Roldana suffulta
                                             Roldana tepopana
                                     Rudbeckia
                                             Rudbeckia acuminata
                                             Rudbeckia alismifolia
                                             Rudbeckia alpicola
                                             Rudbeckia amplectens
                                             Rudbeckia amplexicaulis
                                                   [Dracopis amplexicaulis]
                                             Rudbeckia auriculata
                                             Rudbeckia beadlei
                                             Rudbeckia brittonii
                                             Rudbeckia californica
                                               Rudbeckia californica var. glauca
                                               Rudbeckia californica var. intermedia
                                             Rudbeckia chapmanii
                                             Rudbeckia deamii
                                             Rudbeckia divergens
                                             Rudbeckia floridana
                                               Rudbeckia floridana var. angustifolia
                                             Rudbeckia foliosa
                                             Rudbeckia fulgida
                                               Rudbeckia fulgida var. auriculata
                                               Rudbeckia fulgida var. deamii
                                               Rudbeckia fulgida var. fulgida
                                               Rudbeckia fulgida var. missouriensis
                                               Rudbeckia fulgida var. palustris
                                               Rudbeckia fulgida var. spathulata
                                               Rudbeckia fulgida var. speciosa
                                                     [Rudbeckia gloriosa]
                                                     [Rudbeckia speciosa var. sullivantii]
                                                     [Rudbeckia speciosa]
                                                     [Rudbeckia sullivantii]
                                               Rudbeckia fulgida var. sullivantii
                                               Rudbeckia fulgida var. umbrosa
                                             Rudbeckia glabra
                                             Rudbeckia glaucescens
                                             Rudbeckia graminifolia
                                             Rudbeckia grandiflora
                                               Rudbeckia grandiflora var. alismaefolia
                                               Rudbeckia grandiflora var. alismifolia
                                               Rudbeckia grandiflora var. grandiflora
                                             Rudbeckia heliopsidis
                                             Rudbeckia heterophylla
                                             Rudbeckia hirta
                                               Rudbeckia hirta var. angustifolia
                                               Rudbeckia hirta var. brittonii
                                               Rudbeckia hirta var. floridana
                                               Rudbeckia hirta var. hirta
                                               Rudbeckia hirta var. monticola
                                               Rudbeckia hirta var. pulcherrima
                                                     [Rudbeckia bicolor]
                                                     [Rudbeckia hirta var. corymbifera]
                                                     [Rudbeckia hirta var. lanceolata]
                                                     [Rudbeckia hirta var. sericea]
                                                     [Rudbeckia hirta var. serotina]
                                                     [Rudbeckia longipes]
                                                     [Rudbeckia sericea]
                                                     [Rudbeckia serotina var. corymbifera]
                                                     [Rudbeckia serotina var. lanceolata]
                                                     [Rudbeckia serotina var. sericea]
                                                     [Rudbeckia serotina]
                                             Rudbeckia klamathensis
                                             Rudbeckia laciniata
                                               Rudbeckia laciniata var. ampla
                                                     [Rudbeckia ampla]
                                                     [Rudbeckia laciniata ssp. ampla]
                                               Rudbeckia laciniata var. bipinnata
                                               Rudbeckia laciniata var. digitata
                                               Rudbeckia laciniata var. heterophylla
                                               Rudbeckia laciniata var. humilis
                                               Rudbeckia laciniata var. laciniata
                                                     [Rudbeckia laciniata var. hortensis]
                                             Rudbeckia maxima
                                             Rudbeckia missouriensis
                                             Rudbeckia mohrii
                                             Rudbeckia mollis
                                             Rudbeckia montana
                                             Rudbeckia monticola
                                             Rudbeckia nitida
                                               Rudbeckia nitida var. texana
                                             Rudbeckia occidentalis
                                                   [Rudbeckia occidentalis var. occidentalis]
                                               Rudbeckia occidentalis var. alpicola
                                               Rudbeckia occidentalis var. montana
                                             Rudbeckia palustris
                                             Rudbeckia pinnatiloba
                                             Rudbeckia rupestris
                                             Rudbeckia scabrifolia
                                             Rudbeckia spathulata
                                             Rudbeckia subtomentosa
                                             Rudbeckia tenax
                                             Rudbeckia texana
                                             Rudbeckia triloba
                                               Rudbeckia triloba var. beadlei
                                               Rudbeckia triloba var. pinnatiloba
                                               Rudbeckia triloba var. rupestris
                                               Rudbeckia triloba var. triloba
                                             Rudbeckia truncata
                                             Rudbeckia umbrosa
                                     Rugelia
                                             Rugelia nudicaulis
                                     Rumfordia
                                             Rumfordia exauriculata
                                             Rumfordia floribunda
                                               Rumfordia floribunda var. jaliscensis
                                     Rydbergia
                                     Sabazia
                                             Sabazia anomala
                                             Sabazia durangensis
                                             Sabazia glabra
                                             Sabazia humilis
                                             Sabazia liebmannii
                                             Sabazia microspermoides
                                             Sabazia multiradiata
                                             Sabazia palmeri
                                     Sachsia
                                             Sachsia bahamensis
                                             Sachsia polycephala
                                     Salmea
                                             Salmea palmeri
                                             Salmea scandens
                                     Santolina
                                             Santolina chamaecyparissus
                                             Santolina neapolitana
                                             Santolina rosmarinifolia
                                             Santolina virens
                                     Sanvitalia
                                             Sanvitalia aberti
                                             Sanvitalia abertii
                                             Sanvitalia fruticosa
                                             Sanvitalia ocymoides
                                                   [Calyptocarpus blepharolepis]
                                             Sanvitalia procumbens
                                                   [Sanvitalia angustifolia]
                                             Sanvitalia tenuis
                                     Sartwellia
                                             Sartwellia flaveriae
                                                   [Sartwellia puberula]
                                             Sartwellia gypsophila
                                             Sartwellia mexicana
                                     Saussurea
                                             Saussurea albescens
                                             Saussurea alpina
                                             Saussurea amara
                                               Saussurea amara var. glomerata
                                             Saussurea americana
                                             Saussurea angustifolia
                                               Saussurea angustifolia ssp. yukonensis
                                               Saussurea angustifolia var. angustifolia
                                               Saussurea angustifolia var. viscida
                                               Saussurea angustifolia var. yukonensis
                                             Saussurea arenaria
                                             Saussurea densa
                                             Saussurea glomerata
                                             Saussurea leontodontoides
                                             Saussurea nuda
                                               Saussurea nuda ssp. densa
                                               Saussurea nuda var. densa
                                             Saussurea stella
                                             Saussurea superba
                                             Saussurea tilesii
                                             Saussurea triangulata
                                             Saussurea viscida
                                               Saussurea viscida var. yukonensis
                                             Saussurea weberi
                                             Saussurea x tschuktschorum
                                     Scabrethia
                                             Scabrethia scabra
                                                   [Wyethia scabra]
                                               Scabrethia scabra ssp. attenuata
                                                     [Wyethia scabra var. attenuata]
                                               Scabrethia scabra ssp. canescens
                                                     [Wyethia scabra var. canescens]
                                               Scabrethia scabra ssp. scabra
                                                     [Wyethia scabra var. scabra]
                                     Scalesia
                                     Schaetzellia
                                     Schistocarpha
                                             Schistocarpha eupatorioides
                                             Schistocarpha liebmannii
                                             Schistocarpha longiligula
                                             Schistocarpha platyphylla
                                     Schizoptera
                                       Schizoptera (Lophopleurum)
                                     Schizotrichia
                                     Schkuhria
                                             Schkuhria anthemoidea
                                               Schkuhria anthemoidea var. anthemoidea
                                               Schkuhria anthemoidea var. wrightii
                                             Schkuhria multiflora
                                                   [Bahia neomexicana]
                                                   [Schkuhria multiflora var. multiflora]
                                             Schkuhria pinnata
                                                   [Schkuhria wislizeni var. frustrata]
                                                   [Schkuhria wislizeni var. wrightii]
                                                   [Schkuhria wislizeni]
                                               Schkuhria pinnata var. guatemalensis
                                               Schkuhria pinnata var. pinnata
                                               Schkuhria pinnata var. virgata
                                               Schkuhria pinnata var. wislizeni
                                             Schkuhria pringlei
                                             Schkuhria schkuhrioides
                                             Schkuhria wislizenii
                                             Schkuhria wrightii
                                     Sciadocephala
                                     Sclerocarpus
                                             Sclerocarpus africanus
                                             Sclerocarpus divaricatus
                                             Sclerocarpus major
                                             Sclerocarpus schiedeanus
                                             Sclerocarpus spathulatus
                                             Sclerocarpus spatulatus
                                             Sclerocarpus uniserialis
                                               Sclerocarpus uniserialis var. austrotexanus
                                               Sclerocarpus uniserialis var. frutescens
                                               Sclerocarpus uniserialis var. uniserialis
                                     Sclerolepis
                                             Sclerolepis uniflora
                                     Scolymus
                                             Scolymus grandiflorus
                                             Scolymus hispanicus
                                             Scolymus maculatus
                                     Scorzonella
                                             Scorzonella arguta
                                             Scorzonella laciniata
                                               Scorzonella laciniata var. bolanderi
                                               Scorzonella laciniata var. pratensis
                                             Scorzonella leachiana
                                             Scorzonella lepidota
                                             Scorzonella leptosepala
                                             Scorzonella montana
                                             Scorzonella paludosa
                                               Scorzonella paludosa var. integrifolia
                                             Scorzonella pratensis
                                             Scorzonella procera
                                             Scorzonella sylvatica
                                     Scorzonera
                                             Scorzonera hispanica
                                             Scorzonera laciniata
                                                   [Podospermum laciniatum]
                                             Scorzonera seidlitzii
                                     Selloa
                                     Senecio
                                             Senecio actinella
                                                   [Packera actinella]
                                                   [Senecio actinella var. mogollonicus]
                                             Senecio alaskanus
                                             Senecio albonervius
                                             Senecio ammophilus
                                             Senecio amplectens
                                               Senecio amplectens var. amplectens
                                               Senecio amplectens var. holmii
                                                     [Ligularia amplectens var. holmii]
                                                     [Ligularia holmii]
                                                     [Senecio holmii]
                                             Senecio ampullaceus
                                             Senecio andersonii
                                             Senecio andrieuxii
                                             Senecio angulatus
                                             Senecio angulifolius
                                             Senecio angustissimus
                                             Senecio anonymus
                                             Senecio antennariifolius
                                             Senecio anteuphorbium
                                             Senecio aphanactis
                                             Senecio aquaticus
                                               Senecio aquaticus ssp. barbareifolius
                                             Senecio argutus
                                             Senecio arizonicus
                                             Senecio aronicoides
                                             Senecio aschenbornianus
                                             Senecio astephanus
                                             Senecio atratus
                                             Senecio atropurpureus
                                               Senecio atropurpureus ssp. frigidus
                                               Senecio atropurpureus ssp. tomentosus
                                               Senecio atropurpureus var. dentatus
                                               Senecio atropurpureus var. ulmeri
                                             Senecio aurellus
                                             Senecio aureus
                                               Senecio aureus var. aquilonius
                                               Senecio aureus var. gracilis
                                               Senecio aureus var. intercursus
                                               Senecio aureus var. semicordatus
                                             Senecio bairdii
                                             Senecio barba-johannis
                                             Senecio bellidifolius
                                             Senecio bernardinus
                                               Senecio bernardinus var. sparsilobatus
                                             Senecio bicolor
                                               Senecio bicolor ssp. cineraria
                                                     [Senecio cineraria]
                                             Senecio bigelovii
                                               Senecio bigelovii var. bigelovii
                                                     [Ligularia bigelovii]
                                               Senecio bigelovii var. hallii
                                                     [Ligularia bigelovii var. hallii]
                                             Senecio bivestitus
                                             Senecio blochmanae
                                             Senecio blochmaniae
                                             Senecio blumeri
                                             Senecio bolanderi
                                               Senecio bolanderi var. harfordii
                                             Senecio bombycopholis
                                             Senecio bracteolatus
                                             Senecio breweri
                                             Senecio bridgesii
                                             Senecio cacalioides
                                             Senecio californicus
                                               Senecio californicus var. ammophilus
                                             Senecio callosus
                                             Senecio candidissimus
                                             Senecio cannabifolius
                                             Senecio cannabinifolius
                                             Senecio canovirens
                                             Senecio capillaris
                                             Senecio caulanthifolius
                                             Senecio cedrosensis
                                             Senecio chapalensis
                                             Senecio chihuahuensis
                                             Senecio chloranthus
                                             Senecio chrysanthemoides
                                             Senecio cinerarioides
                                             Senecio clarkianus
                                             Senecio clevelandii
                                               Senecio clevelandii var. heterophyllus
                                             Senecio cliffordii
                                             Senecio clivorum
                                             Senecio cognatus
                                             Senecio confusus
                                             Senecio congestus
                                                   [Cineraria congesta]
                                                   [Senecio congestus ssp. tonsus]
                                                   [Senecio congestus var. palustris]
                                                   [Senecio congestus var. tonsus]
                                                   [Senecio palustris]
                                             Senecio conterminus
                                             Senecio contristatus
                                             Senecio conzattii
                                             Senecio covasii
                                             Senecio covillei
                                               Senecio covillei var. scorzonella
                                             Senecio coxi
                                             Senecio crassulus
                                                   [Senecio crassulus var. cusickii]
                                             Senecio cremeiflorus
                                             Senecio crepidineus
                                             Senecio cruentus
                                             Senecio cyclophyllus
                                             Senecio cymbalaria
                                             Senecio darwinii
                                             Senecio debilis
                                             Senecio deflersii
                                             Senecio deformis
                                             Senecio deppeanus
                                             Senecio dimorphophyllus
                                               Senecio dimorphophyllus var. intermedius
                                               Senecio dimorphophyllus var. paysonii
                                             Senecio discoideus
                                             Senecio doratophyllus
                                             Senecio ehrenbergianus
                                             Senecio elegans
                                             Senecio elmeri
                                             Senecio eremophilus
                                               Senecio eremophilus var. eremophilus
                                               Senecio eremophilus var. kingii
                                                     [Senecio ambrosioides]
                                                     [Senecio eremophilus ssp. kingii]
                                                     [Senecio kingii]
                                               Senecio eremophilus var. macdougalii
                                                     [Senecio eremophilus ssp. macdougalii]
                                                     [Senecio macdougalii]
                                             Senecio erraticus
                                             Senecio ertterae
                                             Senecio erucifolius
                                             Senecio eurycephalus
                                               Senecio eurycephalus var. lewisrosei
                                               Senecio eurycephalus var. major
                                             Senecio fedifolius
                                             Senecio filaginoides
                                             Senecio filaris
                                             Senecio flaccidus
                                                   [Senecio douglasii var. douglasii]
                                               Senecio flaccidus var. douglasii
                                                     [Senecio douglasii var. tularensis]
                                               Senecio flaccidus var. flaccidus
                                                     [Senecio douglasii ssp. longilobus]
                                                     [Senecio douglasii var. jamesii]
                                                     [Senecio douglasii var. longilobus]
                                                     [Senecio filifolius]
                                                     [Senecio longilobus]
                                               Senecio flaccidus var. monoensis
                                                     [Senecio douglasii var. monoensis]
                                                     [Senecio douglasii]
                                                     [Senecio monoensis]
                                             Senecio flettii
                                             Senecio flintii
                                             Senecio flocciferus
                                             Senecio foetidus
                                               Senecio foetidus var. hydrophiloides
                                             Senecio fremontii
                                               Senecio fremontii ssp. occidentalis
                                               Senecio fremontii var. blitoides
                                                     [Senecio blitoides]
                                                     [Senecio carthamoides]
                                                     [Senecio fremontii ssp. blitoides]
                                               Senecio fremontii var. fremontii
                                               Senecio fremontii var. inexpectans
                                               Senecio fremontii var. inexpectatus
                                               Senecio fremontii var. occidentalis
                                             Senecio frigidus
                                             Senecio glaucifolius
                                             Senecio glaucus
                                             Senecio glomeratus
                                             Senecio gnidioides
                                             Senecio gracilis
                                             Senecio grandifolius
                                             Senecio greenei
                                             Senecio grisebachii
                                             Senecio guadalajarensis
                                             Senecio haenkei
                                             Senecio harfordii
                                             Senecio hederoides
                                             Senecio helodes
                                             Senecio heracleifolius
                                             Senecio hesperius
                                             Senecio heterodoxus
                                             Senecio heterotrichius
                                             Senecio hieraciifolius
                                             Senecio hirsuticaulis
                                             Senecio hoffmannii
                                             Senecio hybridus
                                             Senecio hydrophiloides
                                             Senecio hydrophilus
                                                   [Senecio sandvicensis]
                                               Senecio hydrophilus var. pacificus
                                             Senecio indecorus
                                             Senecio integerrimus
                                               Senecio integerrimus var. exaltatus
                                                     [Senecio columbianus]
                                                     [Senecio exaltatus]
                                                     [Senecio hookeri]
                                                     [Senecio integerrimus var. vaseyi]
                                                     [Senecio lugens var. exaltatus]
                                                     [Senecio vaseyi]
                                               Senecio integerrimus var. integerrimus
                                               Senecio integerrimus var. lugens
                                               Senecio integerrimus var. major
                                               Senecio integerrimus var. ochroleucus
                                               Senecio integerrimus var. scribneri
                                             Senecio integrifolius
                                             Senecio invenustus
                                             Senecio ionophyllus
                                               Senecio ionophyllus var. sparsilobatus
                                             Senecio jacobaea
                                             Senecio joppensis
                                             Senecio kjellmanii
                                             Senecio kuntzei
                                             Senecio lactucinus
                                             Senecio lanatifolius
                                             Senecio lapathifolius
                                             Senecio lapidum
                                             Senecio lathyroides
                                             Senecio layneae
                                             Senecio lemmonii
                                             Senecio leucoreus
                                             Senecio lewisrosei
                                             Senecio ligulifolius
                                             Senecio lindstroemii
                                             Senecio linearifolius
                                             Senecio lugens
                                               Senecio lugens var. hookeri
                                               Senecio lugens var. ochroleucus
                                               Senecio lugens var. parryi
                                             Senecio lyoni
                                             Senecio lyonii
                                             Senecio macounii
                                             Senecio madagascariensis
                                             Senecio madrensis
                                             Senecio magellanicus
                                             Senecio magnificus
                                             Senecio mairetianus
                                             Senecio malmstenii
                                             Senecio mandraliscae
                                             Senecio martirensis
                                             Senecio megacephalus
                                             Senecio melanopotamicus
                                             Senecio memmingeri
                                             Senecio mendocinensis
                                             Senecio mexicanus
                                             Senecio mikanioides
                                             Senecio milleflorus
                                             Senecio millefolium
                                             Senecio minimus
                                             Senecio mogollonicus
                                             Senecio mohavensis
                                             Senecio moranii
                                             Senecio moresbiensis
                                                   [Senecio cymbalarioides ssp. moresbiensis]
                                                   [Senecio streptanthifolius var. moresbiensis]
                                             Senecio muehlenbergii
                                             Senecio mulgediifolius
                                             Senecio multidentatus
                                               Senecio multidentatus var. huachucanus
                                                     [Senecio huachucanus]
                                             Senecio murorum
                                             Senecio murrayi
                                             Senecio musiniensis
                                             Senecio neowebsteri
                                             Senecio newcombei
                                             Senecio oblanceolatus
                                             Senecio ogotorukensis
                                             Senecio orizabensis
                                             Senecio otites
                                             Senecio palmensis
                                             Senecio papagonius
                                             Senecio parasiticus
                                             Senecio parryi
                                             Senecio pattersonensis
                                             Senecio pauciflorus
                                               Senecio pauciflorus var. fallax
                                               Senecio pauciflorus var. jucundulus
                                             Senecio pectinatus
                                             Senecio pentodontus
                                             Senecio pereziifolius
                                             Senecio petasitis
                                             Senecio petraeus
                                             Senecio phaeanthus
                                             Senecio phorodendroides
                                             Senecio picridis
                                             Senecio pinacatensis
                                             Senecio pinetorum
                                             Senecio platypus
                                             Senecio praecox
                                             Senecio prenanthoides
                                             Senecio pringlei
                                             Senecio prionophyllus
                                             Senecio prionopterus
                                             Senecio pseudaureus
                                               Senecio pseudaureus ssp. semicordatus
                                               Senecio pseudaureus var. semicordatus
                                             Senecio pseudoarnica
                                             Senecio pudicus
                                                   [Ligularia pudica]
                                                   [Senecio cernuus]
                                             Senecio pyrrhochrous
                                             Senecio quadridentatus
                                             Senecio quaylei
                                             Senecio quebradensis
                                             Senecio quenselii
                                             Senecio radicans
                                             Senecio rapifolius
                                             Senecio rawsonianus
                                             Senecio reglensis
                                             Senecio remifolius
                                             Senecio reniformis
                                             Senecio resedifolius
                                             Senecio richardsonii
                                             Senecio riddellii
                                                   [Senecio spartioides var. fremontii]
                                                   [Senecio spartioides var. parksii]
                                             Senecio riomayensis
                                             Senecio robbinsii
                                             Senecio roldana
                                             Senecio rosei
                                             Senecio roseus
                                             Senecio rosulatus
                                             Senecio rugelia
                                             Senecio rupestris
                                             Senecio rusbyi
                                             Senecio rzedowskii
                                             Senecio sacramentanus
                                             Senecio salicinus
                                             Senecio sandersiana
                                             Senecio sandersii
                                             Senecio sanguisorbae
                                             Senecio scalaris
                                               Senecio scalaris var. carmenensis
                                             Senecio scaposus
                                             Senecio schweinitzianus
                                             Senecio scorzonella
                                             Senecio scribneri
                                             Senecio seemannii
                                             Senecio semicordatus
                                             Senecio seridophyllus
                                             Senecio serra
                                               Senecio serra var. admirabilis
                                                     [Senecio admirabilis]
                                               Senecio serra var. altior
                                               Senecio serra var. integriusculus
                                               Senecio serra var. serra
                                               Senecio serra var. sanctus
                                             Senecio sessilifolius
                                             Senecio sheldonensis
                                             Senecio sinuatus
                                             Senecio smallii
                                             Senecio smithii
                                             Senecio soldanella
                                                   [Ligularia soldanella]
                                             Senecio spartioides
                                               Senecio spartioides var. multicapitatus
                                                     [Senecio multicapitatus]
                                               Senecio spartioides var. spartioides
                                                     [Senecio spartioides var. granularis]
                                                     [Senecio toiyabensis]
                                             Senecio sphaerocephalus
                                             Senecio spribillei
                                             Senecio squalidus
                                             Senecio standleyi
                                             Senecio stapeliiformis
                                             Senecio stoechadiformis
                                             Senecio subnudus
                                             Senecio subulatus
                                             Senecio sylvaticus
                                             Senecio taraxacoides
                                                   [Ligularia taraxacoides]
                                                   [Senecio amplectens var. taraxacoides]
                                               Senecio taraxacoides var. nudatus
                                             Senecio tepopanus
                                             Senecio thomasii
                                             Senecio toluccanus
                                               Senecio toluccanus var. microdontus
                                             Senecio townsendii
                                             Senecio tracyi
                                             Senecio triangularis
                                                   [Senecio gibbsonsii]
                                                   [Senecio triangularis var. angustifolius]
                                               Senecio triangularis var. hanseni
                                             Senecio trigonophyllus
                                             Senecio turbinatus
                                             Senecio umbraculifera
                                             Senecio valerianifolius
                                             Senecio velatus
                                             Senecio viejoanus
                                             Senecio viscosus
                                             Senecio vulgaris
                                             Senecio warnockii
                                             Senecio webbii
                                             Senecio wootonii
                                             Senecio yegua
                                             Senecio yukonensis
                                     Senecioides
                                             Senecioides cinerea
                                     Sericocarpus
                                             Sericocarpus asteroides
                                                   [Aster asteroides]
                                                   [Aster paternus]
                                                   [Conyza asteroides]
                                             Sericocarpus californicus
                                             Sericocarpus linifolius
                                             Sericocarpus oregonensis
                                               Sericocarpus oregonensis ssp. californicus
                                               Sericocarpus oregonensis ssp. oregonensis
                                               Sericocarpus oregonensis var. californicus
                                               Sericocarpus oregonensis var. oregonensis
                                             Sericocarpus rigidus
                                             Sericocarpus tomentellus
                                             Sericocarpus tortifolius
                                                   [Aster bifoliatus]
                                                   [Conyza bifoliata]
                                                   [Sericocarpus acutisquamosus]
                                                   [Sericocarpus bifoliatus]
                                     Serinia
                                     Seriphidium
                                             Seriphidium arbusculum
                                               Seriphidium arbusculum ssp. longilobum
                                             Seriphidium canum
                                             Seriphidium rigidum
                                             Seriphidium rothrockii
                                             Seriphidium tripartitum
                                     Serratula
                                             Serratula alpina
                                             Serratula cerinthefolia
                                             Serratula cerinthifolia
                                             Serratula tinctoria
                                     Shinnersia
                                             Shinnersia rivularis
                                     Shinnersoseris
                                             Shinnersoseris rostrata
                                     Sideranthus
                                             Sideranthus aureus
                                             Sideranthus megacephalus
                                             Sideranthus serratus
                                             Sideranthus viscidus
                                     Siegesbeckia
                                     Sigesbeckia
                                             Sigesbeckia jorullensis
                                             Sigesbeckia laciniata
                                             Sigesbeckia orientalis
                                     Silphium
                                             Silphium albiflorum
                                             Silphium angustum
                                             Silphium asteriscus
                                               Silphium asteriscus var. angustatum
                                               Silphium asteriscus var. asteriscus
                                               Silphium asteriscus var. dentatum
                                               Silphium asteriscus var. laevicaule
                                               Silphium asteriscus var. latifolium
                                               Silphium asteriscus var. scabrum
                                               Silphium asteriscus var. simpsonii
                                               Silphium asteriscus var. trifoliatum
                                             Silphium atropurpureum
                                             Silphium brachiatum
                                             Silphium chickamaugense
                                             Silphium compositum
                                               Silphium compositum ssp. ovatifolium
                                               Silphium compositum ssp. reniforme
                                               Silphium compositum ssp. venosum
                                               Silphium compositum var. compositum
                                               Silphium compositum var. ovatifolium
                                               Silphium compositum var. reniforme
                                               Silphium compositum var. venosum
                                             Silphium confertifolium
                                             Silphium connatum
                                             Silphium dentatum
                                               Silphium dentatum var. angustatum
                                             Silphium elliottii
                                             Silphium glabrum
                                             Silphium glutinosum
                                             Silphium gracile
                                             Silphium incisum
                                             Silphium integrifolium
                                               Silphium integrifolium var. asperrimum
                                               Silphium integrifolium var. deamii
                                               Silphium integrifolium var. gattingeri
                                               Silphium integrifolium var. integrifolium
                                               Silphium integrifolium var. laeve
                                               Silphium integrifolium var. neglectum
                                             Silphium laciniatum
                                               Silphium laciniatum var. laciniatum
                                               Silphium laciniatum var. robinsonii
                                             Silphium lapsuum
                                             Silphium mohrii
                                             Silphium nodum
                                             Silphium orae
                                             Silphium ovatifolium
                                             Silphium perfoliatum
                                               Silphium perfoliatum ssp. connatum
                                               Silphium perfoliatum var. connatum
                                               Silphium perfoliatum var. perfoliatum
                                             Silphium perplexum
                                             Silphium pinnatifidum
                                             Silphium radula
                                                   [Silphium asperrimum]
                                                   [Silphium dentatum var. gatesii]
                                                   [Silphium gatesii]
                                               Silphium radula var. gracile
                                               Silphium radula var. radula
                                             Silphium reniforme
                                             Silphium reverchonii
                                             Silphium rumicifolium
                                             Silphium scaberrimum
                                             Silphium simpsonii
                                               Silphium simpsonii var. wrightii
                                             Silphium speciosum
                                             Silphium terebinthinaceum
                                               Silphium terebinthinaceum var. luciae-brauniae
                                               Silphium terebinthinaceum var. pinnatifidum
                                               Silphium terebinthinaceum var. terebinthinaceum
                                             Silphium trifoliatum
                                               Silphium trifoliatum var. latifolium
                                               Silphium trifoliatum var. trifoliatum
                                             Silphium venosum
                                             Silphium wasiotense
                                     Silybum
                                             Silybum eburneum
                                             Silybum marianum
                                                   [Carduus marianus]
                                                   [Mariana mariana]
                                     Simsia
                                             Simsia amplexicaulis
                                             Simsia calva
                                             Simsia chaseae
                                             Simsia foetida
                                               Simsia foetida var. decipiens
                                             Simsia lagasceiformis
                                                   [Simsia exaristata var. perplexa]
                                                   [Simsia exaristata]
                                                   [Simsia lagascaeformis]
                                             Simsia sanguinea
                                             Simsia setosa
                                             Simsia sylvicola
                                     Sinclairia
                                             Sinclairia palmeri
                                     Sinosenecio
                                             Sinosenecio newcombei
                                     Sitilias
                                     Smallanthus
                                             Smallanthus maculatus
                                             Smallanthus macvaughii
                                             Smallanthus oaxacanus
                                             Smallanthus uvedalia
                                             Smallanthus uvedalius
                                                   [Osteospermum uvedalia]
                                                   [Polymnia maculata]
                                                   [Polymnia uvedalia var. densipilis]
                                                   [Polymnia uvedalia var. floridana]
                                                   [Polymnia uvedalia]
                                     Sobreyra
                                     Solidago
                                             Solidago aestivalis
                                             Solidago albopilosa
                                             Solidago altiplanities
                                             Solidago altissima
                                               Solidago altissima ssp. altissima
                                               Solidago altissima ssp. gilvocanescens
                                               Solidago altissima var. pluricephala
                                               Solidago altissima var. procera
                                             Solidago angusta
                                             Solidago anticostensis
                                             Solidago arguta
                                               Solidago arguta ssp. arguta
                                               Solidago arguta ssp. boottii
                                               Solidago arguta ssp. caroliniana
                                               Solidago arguta ssp. pseudoyadkinensis
                                               Solidago arguta var. arguta
                                               Solidago arguta var. boottii
                                               Solidago arguta var. caroliniana
                                               Solidago arguta var. harrisii
                                               Solidago arguta var. neurolepis
                                               Solidago arguta var. strigosa
                                             Solidago aspera
                                             Solidago asteroides
                                             Solidago aureola
                                             Solidago auriculata
                                                   [Solidago amplexicaulis]
                                                   [Solidago notabilis]
                                             Solidago austrina
                                             Solidago axillaris
                                             Solidago bicolor
                                               Solidago bicolor var. concolor
                                               Solidago bicolor var. lanata
                                               Solidago bicolor var. ovalis
                                               Solidago bicolor var. tonsa
                                             Solidago boottii
                                               Solidago boottii var. brachyphylla
                                               Solidago boottii var. caroliniana
                                               Solidago boottii var. ludoviciana
                                             Solidago brachyphylla
                                             Solidago buckleyi
                                             Solidago caesia
                                               Solidago caesia var. axillaris
                                               Solidago caesia var. caesia
                                               Solidago caesia var. curtisii
                                               Solidago caesia var. hispida
                                               Solidago caesia var. paniculata
                                               Solidago caesia var. zedia
                                             Solidago calcicola
                                             Solidago californica
                                             Solidago camporum
                                             Solidago canadensis
                                               Solidago canadensis var. bartramiana
                                               Solidago canadensis var. canadensis
                                               Solidago canadensis var. gilvocanescens
                                                     [Solidago altissima var. gilvocanescens]
                                                     [Solidago gilvocanescens]
                                                     [Solidago pruinosa]
                                               Solidago canadensis var. hargeri
                                               Solidago canadensis var. lepida
                                                     [Solidago canadensis var. subserrata]
                                                     [Solidago lepida var. molina]
                                               Solidago canadensis var. rupestris
                                               Solidago canadensis var. scabra
                                                     [Solidago altissima var. altissima]
                                                     [Solidago hirsutissima]
                                                     [Solidago lunellii]
                                             Solidago canescens
                                             Solidago capulinensis
                                             Solidago caroliniana
                                             Solidago celtidifolia
                                             Solidago chapmanii
                                             Solidago chilensis
                                               Solidago chilensis var. megapotamica
                                             Solidago chrysolepis
                                             Solidago chrysothamnoides
                                             Solidago conferta
                                             Solidago confinis
                                             Solidago corymbosa
                                             Solidago curtisii
                                               Solidago curtisii var. curtisii
                                               Solidago curtisii var. flaccidifolia
                                               Solidago curtisii var. pubens
                                             Solidago cutleri
                                             Solidago deamii
                                             Solidago delicatula
                                             Solidago discoidea
                                             Solidago dispersa
                                             Solidago drummondii
                                             Solidago edisoniana
                                             Solidago elliottii
                                               Solidago elliottii var. ascendens
                                               Solidago elliottii var. edisoniana
                                               Solidago elliottii var. pedicellata
                                             Solidago elliptica
                                             Solidago elongata
                                             Solidago erecta
                                             Solidago ericamerioides
                                             Solidago farwellii
                                             Solidago faucibus
                                             Solidago fistulosa
                                             Solidago flaccidifolia
                                             Solidago flavovirens
                                             Solidago flexicaulis
                                                   [Solidago latifolia]
                                             Solidago galetorum
                                             Solidago garrettii
                                             Solidago gattingeri
                                             Solidago gigantea
                                                   [Aster latissimifolius var. serotinus]
                                                   [Solidago gigantea ssp. serotina]
                                                   [Solidago gigantea var. leiophylla]
                                                   [Solidago gigantea var. pitcheri]
                                                   [Solidago gigantea var. serotina]
                                                   [Solidago gigantea var. shinnersii]
                                                   [Solidago pitcheri]
                                                   [Solidago serotina var. gigantea]
                                                   [Solidago serotina]
                                                   [Solidago serotinoides]
                                                   [Solidago x leiophallax]
                                             Solidago gillmanii
                                                   [Solidago glutinosa var. gillmanii]
                                                   [Solidago spathulata var. gillmanii]
                                             Solidago glomerata
                                             Solidago gracilis
                                             Solidago gracillima
                                             Solidago graminifolia
                                               Solidago graminifolia var. galetorum
                                               Solidago graminifolia var. gymnospermoides
                                               Solidago graminifolia var. major
                                               Solidago graminifolia var. media
                                               Solidago graminifolia var. nuttallii
                                               Solidago graminifolia var. polycephala
                                             Solidago grandiflora
                                             Solidago guiradonis
                                             Solidago gymnospermoides
                                               Solidago gymnospermoides var. callosa
                                             Solidago gypsophila
                                             Solidago harperi
                                             Solidago harrisii
                                             Solidago helleri
                                             Solidago hintoniorum
                                             Solidago hirtella
                                             Solidago hispida
                                               Solidago hispida var. arnoglossa
                                               Solidago hispida var. hispida
                                               Solidago hispida var. lanata
                                               Solidago hispida var. tonsa
                                             Solidago houghtonii
                                             Solidago humilis
                                               Solidago humilis var. nana
                                             Solidago jacksonii
                                               Solidago jacksonii var. humilis
                                             Solidago jejunifolia
                                             Solidago juliae
                                                   [Solidago altissima var. canescens]
                                                   [Solidago canadensis var. canescens]
                                             Solidago juncea
                                                   [Solidago juncea var. neobohemica]
                                                   [Solidago juncea var. ramosa]
                                             Solidago kralii
                                             Solidago laevicaulis
                                             Solidago lancifolia
                                             Solidago lateriflora
                                             Solidago latissimifolia
                                             Solidago leavenworthii
                                             Solidago lepida
                                               Solidago lepida ssp. fallax
                                               Solidago lepida ssp. lepida
                                               Solidago lepida var. lepida
                                               Solidago lepida var. salebrosa
                                                     [Solidago canadensis ssp. elongata]
                                                     [Solidago canadensis ssp. salebrosa]
                                                     [Solidago canadensis var. elongata]
                                                     [Solidago canadensis var. salebrosa]
                                                     [Solidago dumetorum]
                                                     [Solidago lepida var. elongata]
                                                     [Solidago lepida var. fallax]
                                             Solidago lindheimeriana
                                             Solidago ludoviciana
                                             Solidago macrophylla
                                               Solidago macrophylla var. thyrsoidea
                                             Solidago maxonii
                                             Solidago media
                                             Solidago mensalis
                                             Solidago microcephala
                                             Solidago microglossa
                                             Solidago microphylla
                                             Solidago milleriana
                                             Solidago minor
                                             Solidago mirabilis
                                             Solidago missouriensis
                                               Solidago missouriensis var. fasciculata
                                                     [Solidago glaberrima var. moritura]
                                                     [Solidago glaberrima]
                                                     [Solidago missouriensis var. glaberrima]
                                               Solidago missouriensis var. missouriensis
                                                     [Solidago missouriensis var. extraria]
                                                     [Solidago missouriensis var. montana]
                                               Solidago missouriensis var. tenuissima
                                                     [Solidago tenuissima]
                                               Solidago missouriensis var. tolmieana
                                             Solidago mollis
                                               Solidago mollis var. angustata
                                               Solidago mollis var. mollis
                                             Solidago monticola
                                             Solidago moseleyi
                                             Solidago multiradiata
                                                   [Solidago dilatata]
                                               Solidago multiradiata var. arctica
                                               Solidago multiradiata var. multiradiata
                                               Solidago multiradiata var. scopulorum
                                                     [Solidago ciliosa]
                                                     [Solidago multiradiata ssp. scopulorum]
                                                     [Solidago scopulorum]
                                             Solidago nana
                                             Solidago neglecta
                                             Solidago nemoralis
                                               Solidago nemoralis ssp. decemflora
                                                     [Solidago decemflora]
                                                     [Solidago longipetiolata]
                                                     [Solidago nemoralis ssp. longipetiolata]
                                                     [Solidago nemoralis var. decemflora]
                                                     [Solidago nemoralis var. longipetiolata]
                                                     [Solidago pulcherrima]
                                               Solidago nemoralis ssp. haleana
                                               Solidago nemoralis ssp. nemoralis
                                               Solidago nemoralis var. haleana
                                               Solidago nemoralis var. nemoralis
                                             Solidago neurolepis
                                             Solidago nitida
                                             Solidago nuttallii
                                             Solidago odora
                                               Solidago odora ssp. chapmanii
                                               Solidago odora ssp. odora
                                               Solidago odora var. chapmanii
                                               Solidago odora var. odora
                                             Solidago ohioensis
                                             Solidago ouachitensis
                                             Solidago paniculata
                                             Solidago parvirigida
                                             Solidago patula
                                               Solidago patula ssp. patula
                                               Solidago patula ssp. strictula
                                               Solidago patula var. patula
                                               Solidago patula var. strictula
                                             Solidago pauciflosculosa
                                             Solidago pendula
                                             Solidago perglabra
                                             Solidago perlonga
                                             Solidago petiolaris
                                               Solidago petiolaris var. angusta
                                               Solidago petiolaris var. petiolaris
                                               Solidago petiolaris var. wardii
                                             Solidago pinetorum
                                             Solidago plumosa
                                             Solidago polycephala
                                             Solidago polyphylla
                                             Solidago porteri
                                             Solidago ptarmicoides
                                             Solidago pubens
                                             Solidago puberula
                                               Solidago puberula ssp. puberula
                                               Solidago puberula ssp. pulverulenta
                                               Solidago puberula var. puberula
                                               Solidago puberula var. pulverulenta
                                             Solidago pulchra
                                             Solidago pulverulenta
                                             Solidago pumila
                                             Solidago purshii
                                             Solidago racemosa
                                                   [Solidago glutinosa var. racemosa]
                                                   [Solidago spathulata var. racemosa]
                                               Solidago racemosa var. gillmanii
                                             Solidago radula
                                               Solidago radula var. laeta
                                               Solidago radula var. radula
                                               Solidago radula var. stenolepis
                                             Solidago radulina
                                             Solidago randii
                                                   [Solidago glutinosa ssp. randii]
                                                   [Solidago spathulata ssp. randii]
                                               Solidago randii var. monticola
                                             Solidago remota
                                             Solidago riddellii
                                             Solidago rigida
                                               Solidago rigida ssp. glabrata
                                               Solidago rigida ssp. humilis
                                               Solidago rigida ssp. rigida
                                               Solidago rigida var. glabrata
                                               Solidago rigida var. humilis
                                               Solidago rigida var. laevicaulis
                                             Solidago rigidiuscula
                                             Solidago roanensis
                                               Solidago roanensis var. monticola
                                             Solidago rotundifolia
                                             Solidago rugosa
                                               Solidago rugosa ssp. aspera
                                               Solidago rugosa ssp. rugosa
                                               Solidago rugosa var. aspera
                                               Solidago rugosa var. celtidifolia
                                               Solidago rugosa var. cronquistiana
                                               Solidago rugosa var. rugosa
                                               Solidago rugosa var. sphagnophila
                                             Solidago rupestris
                                             Solidago salicina
                                             Solidago scaberrima
                                             Solidago scabrida
                                             Solidago sciaphila
                                             Solidago sempervirens
                                               Solidago sempervirens ssp. mexicana
                                               Solidago sempervirens ssp. sempervirens
                                               Solidago sempervirens var. mexicana
                                                     [Solidago angustifolia]
                                                     [Solidago mexicana]
                                                     [Solidago petiolata]
                                               Solidago sempervirens var. sempervirens
                                             Solidago serra
                                             Solidago shortii
                                             Solidago simplex
                                               Solidago simplex ssp. randii
                                               Solidago simplex ssp. simplex
                                                     [Solidago bellidifolia]
                                                     [Solidago chlorolepis]
                                                     [Solidago decumbens var. chlorolepis]
                                                     [Solidago decumbens var. oreophila]
                                                     [Solidago decumbens]
                                                     [Solidago glutinosa var. chlorolepis]
                                                     [Solidago glutinosa var. nana]
                                                     [Solidago oreophila]
                                                     [Solidago spathulata ssp. spathulata]
                                                     [Solidago spathulata var. nana]
                                               Solidago simplex var. chlorolepis
                                               Solidago simplex var. gillmanii
                                               Solidago simplex var. monticola
                                               Solidago simplex var. nana
                                               Solidago simplex var. ontarioensis
                                               Solidago simplex var. racemosa
                                               Solidago simplex var. simplex
                                                     [Solidago glutinosa var. ontarioensis]
                                                     [Solidago glutinosa]
                                                     [Solidago neomexicana]
                                                     [Solidago spathulata ssp. glutinosa]
                                                     [Solidago spathulata var. neomexicana]
                                               Solidago simplex var. spathulata
                                             Solidago simulans
                                             Solidago spathulata
                                             Solidago speciosa
                                               Solidago speciosa ssp. pallida
                                               Solidago speciosa ssp. speciosa
                                               Solidago speciosa var. angustata
                                               Solidago speciosa var. erecta
                                               Solidago speciosa var. jejunifolia
                                               Solidago speciosa var. pallida
                                                     [Solidago pallida]
                                               Solidago speciosa var. rigidiuscula
                                               Solidago speciosa var. speciosa
                                             Solidago spectabilis
                                               Solidago spectabilis var. confinis
                                               Solidago spectabilis var. spectabilis
                                             Solidago sphacelata
                                                   [Brachychaeta sphacelata]
                                             Solidago spithamaea
                                             Solidago squarrosa
                                             Solidago stricta
                                               Solidago stricta ssp. gracillima
                                               Solidago stricta ssp. stricta
                                             Solidago strigosa
                                             Solidago suaveolens
                                             Solidago tarda
                                             Solidago tenuifolia
                                               Solidago tenuifolia var. pycnocephala
                                             Solidago texensis
                                             Solidago tortifolia
                                             Solidago uliginosa
                                               Solidago uliginosa var. jejunifolia
                                               Solidago uliginosa var. levipes
                                               Solidago uliginosa var. linoides
                                               Solidago uliginosa var. neglecta
                                               Solidago uliginosa var. peracuta
                                               Solidago uliginosa var. terrae-novae
                                               Solidago uliginosa var. uliginosa
                                             Solidago ulmifolia
                                               Solidago ulmifolia var. microphylla
                                               Solidago ulmifolia var. palmeri
                                               Solidago ulmifolia var. ulmifolia
                                             Solidago uniligulata
                                               Solidago uniligulata var. levipes
                                             Solidago velutina
                                                   [Solidago arizonica]
                                                   [Solidago californica var. nevadensis]
                                                   [Solidago canadensis var. arizonica]
                                                   [Solidago howellii]
                                                   [Solidago sparsiflora]
                                                   [Solidago spathulata var. subcinerea]
                                                   [Solidago trinervata]
                                                   [Solidago velutina var. nevadensis]
                                               Solidago velutina ssp. sparsiflora
                                               Solidago velutina ssp. californica
                                             Solidago verna
                                             Solidago villosicarpa
                                             Solidago virgauera
                                               Solidago virgauera var. arctica
                                             Solidago virgaurea
                                             Solidago viscidula
                                             Solidago wardii
                                             Solidago wrightii
                                               Solidago wrightii var. adenophora
                                                     [Solidago bigelovii]
                                               Solidago wrightii var. guadalupensis
                                               Solidago wrightii var. wrightii
                                                     [Solidago bigelovii var. wrightii]
                                             Solidago x asperula
                                             Solidago x bartramiana
                                             Solidago x beaudryi
                                             Solidago x bernardii
                                             Solidago x erskinei
                                             Solidago x hirtipes
                                             Solidago x krotkovii
                                             Solidago x lutescens
                                             Solidago x ovata
                                             Solidago x ulmicaesia
                                             Solidago yadkinensis
                                     Solidaster
                                     Soliva
                                             Soliva anthemifolia
                                             Soliva mutisii
                                             Soliva sessilis
                                                   [Soliva daucifolia]
                                                   [Soliva pterosperma]
                                             Soliva stolonifera
                                     Sonchus
                                             Sonchus arvensis
                                               Sonchus arvensis ssp. arvensis
                                               Sonchus arvensis ssp. uliginosus
                                               Sonchus arvensis var. glabrescens
                                               Sonchus arvensis var. shumovichii
                                             Sonchus asper
                                                   [Sonchus asper ssp. asper]
                                                   [Sonchus asper ssp. glaucescens]
                                                   [Sonchus nymanii]
                                             Sonchus oleraceus
                                             Sonchus palmensis
                                             Sonchus palustris
                                             Sonchus tenerrimus
                                             Sonchus uliginosus
                                     Sphaeranthus
                                             Sphaeranthus suaveolens
                                     Sphaeromeria
                                             Sphaeromeria argentea
                                             Sphaeromeria cana
                                                   [Tanacetum canum]
                                             Sphaeromeria capitata
                                             Sphaeromeria compacta
                                             Sphaeromeria diversifolia
                                                   [Tanacetum diversifolium]
                                             Sphaeromeria martirensis
                                             Sphaeromeria potentilloides
                                               Sphaeromeria potentilloides var. nitrophila
                                               Sphaeromeria potentilloides var. potentilloides
                                             Sphaeromeria ruthiae
                                             Sphaeromeria simplex
                                     Sphagneticola
                                             Sphagneticola gracilis
                                             Sphagneticola trilobata
                                                   [Complaya trilobata]
                                                   [Silphium trilobatum]
                                                   [Thelechitonia trilobata]
                                     Spilanthes
                                             Spilanthes acmella
                                             Spilanthes alba
                                             Spilanthes americana
                                               Spilanthes americana var. repens
                                               Spilanthes americana var. stolonifera
                                             Spilanthes disciformis
                                               Spilanthes disciformis var. phaneractis
                                             Spilanthes iodiscaea
                                             Spilanthes oleracea
                                             Spilanthes pusilla
                                             Spilanthes stolonifera
                                             Spilanthes uliginosa
                                             Spilanthes urens
                                     Spiracantha
                                             Spiracantha cornifolia
                                     Squamopappus
                                     Stachycephalum
                                     Standleyanthus
                                     Starkea
                                     Stebbinsoseris
                                             Stebbinsoseris decipiens
                                             Stebbinsoseris heterocarpa
                                                   [Microseris heterocarpa]
                                     Steiractinia
                                     Stemmatella
                                     Stemmodontia
                                             Stemmodontia calycina
                                     Stenactis
                                             Stenactis strigosa
                                     Stenopadus
                                     Stenotopsis
                                     Stenotus
                                             Stenotus acaulis
                                                   [Haplopappus acaulis var. glabratus]
                                                   [Stenotus acaulis var. glabratus]
                                               Stenotus acaulis var. acaulis
                                                     [Haplopappus acaulis ssp. typicus]
                                                     [Haplopappus acaulis]
                                               Stenotus acaulis var. kennedyi
                                             Stenotus armerioides
                                               Stenotus armerioides var. armerioides
                                                     [Haplopappus armerioides]
                                               Stenotus armerioides var. gramineus
                                                     [Haplopappus armerioides var. gramineus]
                                             Stenotus caespitosus
                                             Stenotus falcatus
                                             Stenotus lanuginosus
                                                   [Haplopappus lanuginosus ssp. andersonii]
                                                   [Haplopappus lanuginosus ssp. typicus]
                                                   [Haplopappus lanuginosus var. andersonii]
                                                   [Haplopappus lanuginosus]
                                                   [Stenotus andersonii]
                                               Stenotus lanuginosus var. andersonii
                                               Stenotus lanuginosus var. lanuginosus
                                             Stenotus latifolius
                                             Stenotus linearifolius
                                             Stenotus macleanii
                                             Stenotus pulvinatus
                                             Stenotus pygmaeus
                                             Stenotus scaber
                                             Stenotus stenophyllus
                                     Stephananthus
                                     Stephanomeria
                                             Stephanomeria blairii
                                             Stephanomeria carotifera
                                             Stephanomeria cichoriacea
                                             Stephanomeria coronaria
                                             Stephanomeria diegensis
                                             Stephanomeria elata
                                             Stephanomeria exigua
                                               Stephanomeria exigua ssp. carotifera
                                               Stephanomeria exigua ssp. coronaria
                                               Stephanomeria exigua ssp. deanei
                                               Stephanomeria exigua ssp. exigua
                                                     [Lygodesmia bigelovii]
                                                     [Stephanomeria exigua ssp. pentachaeta]
                                                     [Stephanomeria exigua var. pentachaeta]
                                                     [Stephanomeria schottii]
                                               Stephanomeria exigua ssp. macrocarpa
                                               Stephanomeria exigua var. coronaria
                                               Stephanomeria exigua var. deanei
                                             Stephanomeria fluminea
                                             Stephanomeria guadalupensis
                                             Stephanomeria lactucina
                                             Stephanomeria malheurensis
                                             Stephanomeria minor
                                               Stephanomeria minor var. myrioclada
                                               Stephanomeria minor var. uintaensis
                                               Stephanomeria minor var. uintensis
                                             Stephanomeria monocephala
                                             Stephanomeria myrioclada
                                                   [Stephanomeria tenuifolia var. myrioclada]
                                             Stephanomeria paniculata
                                             Stephanomeria parryi
                                             Stephanomeria pauciflora
                                                   [Lygodesmia pauciflora]
                                                   [Ptiloria pauciflora]
                                                   [Stephanomeria cinerea]
                                                   [Stephanomeria lygodesmoides]
                                                   [Stephanomeria neomexicana]
                                                   [Stephanomeria pauciflora var. parishii]
                                                   [Stephanomeria pauciflora var. pauciflora]
                                             Stephanomeria pentachaeta
                                             Stephanomeria runcinata
                                               Stephanomeria runcinata var. parishii
                                             Stephanomeria tenuifolia
                                                   [Ptiloria tenuifolia]
                                                   [Stephanomeria minor var. minor]
                                             Stephanomeria thurberi
                                                   [Lygodesmia thurberi]
                                             Stephanomeria virgata
                                               Stephanomeria virgata ssp. pleurocarpa
                                               Stephanomeria virgata ssp. virgata
                                               Stephanomeria virgata var. tomentosa
                                             Stephanomeria wrightii
                                                   [Lygodesmia wrightii]
                                     Stevia
                                             Stevia alatipes
                                             Stevia amabilis
                                             Stevia amblyolepis
                                               Stevia amblyolepis var. umbratilis
                                             Stevia anadenotricha
                                             Stevia aschenborniana
                                               Stevia aschenborniana var. occidentalis
                                             Stevia berlandieri
                                               Stevia berlandieri var. anadenotricha
                                             Stevia caltepecana
                                             Stevia canescens
                                             Stevia caracasana
                                             Stevia clinopodia
                                             Stevia elatior
                                             Stevia eupatoria
                                             Stevia glandulosa
                                               Stevia glandulosa var. gentryi
                                               Stevia glandulosa var. glandulosa
                                             Stevia incognita
                                             Stevia jaliscensis
                                             Stevia jorullensis
                                             Stevia latifolia
                                             Stevia laxa
                                             Stevia lemmonii
                                               Stevia lemmonii var. hispidula
                                               Stevia lemmonii var. lemmonii
                                             Stevia linoides
                                             Stevia lucida
                                               Stevia lucida var. robinsoniana
                                             Stevia madrensis
                                             Stevia martinii
                                             Stevia micradenia
                                             Stevia micrantha
                                             Stevia microchaeta
                                             Stevia myricoides
                                             Stevia nelsonii
                                             Stevia origanoides
                                             Stevia ovata
                                               Stevia ovata var. ovata
                                               Stevia ovata var. texana
                                             Stevia palmeri
                                               Stevia palmeri var. palmeri
                                             Stevia pelophila
                                             Stevia pilosa
                                             Stevia plummerae
                                               Stevia plummerae var. alba
                                               Stevia plummerae var. durangensis
                                               Stevia plummerae var. plummerae
                                             Stevia polycephala
                                             Stevia porphyrea
                                             Stevia pringlei
                                             Stevia purpusii
                                             Stevia rebaudiana
                                             Stevia reticulata
                                             Stevia rhombifolia
                                             Stevia salicifolia
                                                   [Stevia salicifolia var. stenophylla]
                                                   [Stevia stenophylla]
                                               Stevia salicifolia var. salicifolia
                                               Stevia salicifolia var. virgulifera
                                             Stevia scabrella
                                               Stevia scabrella var. venosa
                                             Stevia seleriana
                                             Stevia serrata
                                                   [Stevia serrata var. haplopappa]
                                                   [Stevia serrata var. ivifolia]
                                               Stevia serrata var. ivaefolia
                                               Stevia serrata var. linoides
                                               Stevia serrata var. serrata
                                             Stevia subpubescens
                                               Stevia subpubescens var. intermedia
                                               Stevia subpubescens var. opaca
                                             Stevia tephra
                                             Stevia tomentosa
                                             Stevia trifida
                                             Stevia venosa
                                             Stevia viminea
                                             Stevia viscida
                                     Steviopsis
                                             Steviopsis dryophila
                                             Steviopsis fendleri
                                     Stilpnopappus
                                     Stizolophus
                                             Stizolophus balsamita
                                     Stokesia
                                             Stokesia laevis
                                     Stomatanthes
                                     Strotheria
                                             Strotheria gypsophila
                                     Struchium
                                             Struchium sparganophorum
                                                   [Ethulia sparganophora]
                                     Stuckertiella
                                     Stuessya
                                             Stuessya michoacana
                                     Stylocline
                                             Stylocline acaulis
                                             Stylocline amphibola
                                             Stylocline amphiloba
                                             Stylocline citroleum
                                             Stylocline filaginea
                                               Stylocline filaginea var. depressa
                                               Stylocline filaginea var. filaginea
                                             Stylocline gnaphaloides
                                                   [Stylocline gnaphalioides]
                                             Stylocline intertexta
                                             Stylocline masonii
                                             Stylocline micropoides
                                             Stylocline psilocarphoides
                                             Stylocline sonorensis
                                     Stylopappus
                                             Stylopappus elatus
                                     Symphyotrichum
                                             Symphyotrichum adnatum
                                             Symphyotrichum amethystinum
                                             Symphyotrichum anomalum
                                             Symphyotrichum anticostense
                                             Symphyotrichum ascendens
                                                   [Aster adscendens]
                                                   [Aster ascendens]
                                                   [Aster chilensis ssp. adscendens]
                                                   [Aster macounii]
                                                   [Aster subgriseus]
                                                   [Virgulaster ascendens]
                                             Symphyotrichum bahamense
                                             Symphyotrichum boreale
                                             Symphyotrichum bracei
                                             Symphyotrichum burgessii
                                                   [Aster burgessii]
                                             Symphyotrichum campestre
                                               Symphyotrichum campestre var. bloomeri
                                               Symphyotrichum campestre var. campestre
                                             Symphyotrichum chapmanii
                                             Symphyotrichum chilense
                                               Symphyotrichum chilense var. chilense
                                                     [Aster chilensis var. medius]
                                                     [Aster chilensis]
                                               Symphyotrichum chilense var. invenustum
                                               Symphyotrichum chilense var. medium
                                             Symphyotrichum ciliatum
                                                   [Aster brachyactis]
                                                   [Brachyactis angusta]
                                                   [Brachyactis ciliata ssp. angusta]
                                                   [Brachyactis ciliata]
                                                   [Tripolium angustum]
                                             Symphyotrichum ciliolatum
                                               Symphyotrichum ciliolatum var. comatum
                                               Symphyotrichum ciliolatum var. maccallae
                                               Symphyotrichum ciliolatum var. wilsonii
                                             Symphyotrichum concolor
                                               Symphyotrichum concolor var. concolor
                                               Symphyotrichum concolor var. devestitum
                                             Symphyotrichum cordifolium
                                                   [Aster cordifolius ssp. laevigatus]
                                                   [Aster cordifolius ssp. sagittifolius]
                                                   [Aster cordifolius var. furbishiae]
                                                   [Aster cordifolius var. incisus]
                                                   [Aster cordifolius var. laevigatus]
                                                   [Aster cordifolius var. lanceolatus]
                                                   [Aster cordifolius var. moratus]
                                                   [Aster cordifolius var. polycephalus]
                                                   [Aster cordifolius var. racemiflorus]
                                                   [Aster cordifolius var. sagittifolius]
                                                   [Aster cordifolius]
                                                   [Aster finkii var. moratus]
                                                   [Aster lowrieanus var. incisus]
                                                   [Aster lowrieanus var. lanceolatus]
                                                   [Aster plumarius]
                                                   [Aster sagittifolius]
                                                   [Symphyotrichum cordifolium var. furbishiae]
                                                   [Symphyotrichum cordifolium var. lanceolatum]
                                                   [Symphyotrichum cordifolium var. moratum]
                                                   [Symphyotrichum cordifolium var. polycephalum]
                                                   [Symphyotrichum cordifolium var. racemiflorum]
                                                   [Symphyotrichum sagittifolium]
                                             Symphyotrichum crenifolium
                                             Symphyotrichum cusickii
                                             Symphyotrichum defoliatum
                                             Symphyotrichum depauperatum
                                             Symphyotrichum divaricatum
                                                   [Aster boykinii]
                                                   [Aster carmesinus]
                                                   [Aster castaneus]
                                                   [Aster claytoni]
                                                   [Aster divaricatus]
                                                   [Aster excavatus]
                                                   [Aster exilis var. australis]
                                                   [Aster exilis]
                                                   [Aster flexilus]
                                                   [Aster neomexicana]
                                                   [Aster neomexicanus]
                                                   [Aster stilettiformis]
                                                   [Aster subulatus var. ligulatus]
                                                   [Aster tenebrosus]
                                             Symphyotrichum drummondii
                                               Symphyotrichum drummondii var. drummondii
                                               Symphyotrichum drummondii var. parviceps
                                               Symphyotrichum drummondii var. texanum
                                             Symphyotrichum dumosum
                                               Symphyotrichum dumosum var. dodgei
                                               Symphyotrichum dumosum var. dumosum
                                               Symphyotrichum dumosum var. gracilipes
                                               Symphyotrichum dumosum var. pergracile
                                               Symphyotrichum dumosum var. strictior
                                               Symphyotrichum dumosum var. subulifolium
                                             Symphyotrichum eatonii
                                                   [Aster bracteolatus]
                                                   [Aster cordalenus]
                                                   [Aster eatonii]
                                                   [Aster foliaceus var. eatonii]
                                                   [Aster mearnsii]
                                                   [Aster oregonus]
                                                   [Symphyotrichum bracteolatum]
                                             Symphyotrichum elliotii
                                             Symphyotrichum elliottii
                                             Symphyotrichum ericoides
                                               Symphyotrichum ericoides var. ericoides
                                                     [Aster ericoides var. platyphyllus]
                                                     [Aster ericoides var. prostratus]
                                                     [Aster ericoides var. pusillus]
                                                     [Aster ericoides]
                                                     [Aster exiguus]
                                                     [Aster multiflorus var. exiguus]
                                                     [Aster multiflorus var. prostratus]
                                                     [Aster multiflorus]
                                                     [Aster polycephalus]
                                                     [Lasallea ericoides]
                                                     [Symphyotrichum ericoides var. prostratum]
                                                     [Virgulus ericoides]
                                               Symphyotrichum ericoides var. pansum
                                                     [Aster ericoides ssp. pansus]
                                                     [Aster ericoides var. pansus]
                                                     [Aster multiflorus var. pansus]
                                                     [Aster pansus]
                                               Symphyotrichum ericoides var. stricticaule
                                                     [Aster ericoides var. stricticaulis]
                                                     [Aster multiflorus var. stricticaulis]
                                                     [Aster stricticaulis]
                                             Symphyotrichum eulae
                                             Symphyotrichum falcatum
                                                   [Aster falcatus]
                                               Symphyotrichum falcatum ssp. commutatum
                                               Symphyotrichum falcatum var. commutatum
                                                     [Aster commutatus var. polycephalus]
                                                     [Aster commutatus]
                                                     [Aster cordineri]
                                                     [Aster ericoides var. commutatus]
                                                     [Aster falcatus ssp. commutatus]
                                                     [Aster falcatus var. commutatus]
                                                     [Aster multiflorus var. commutatus]
                                                     [Aster nahanniensis]
                                               Symphyotrichum falcatum var. crassulum
                                                     [Aster adsurgens]
                                                     [Aster commutatus var. crassulus]
                                                     [Aster crassulus]
                                                     [Aster falcatus var. crassulus]
                                               Symphyotrichum falcatum var. falcatum
                                                     [Aster elegantulus]
                                                     [Aster ramulosus]
                                                     [Lasallea falcata]
                                                     [Virgulus falcatus var. commutatus]
                                                     [Virgulus falcatus]
                                             Symphyotrichum fendleri
                                                   [Aster fendleri]
                                                   [Virgulus fendleri]
                                             Symphyotrichum firmum
                                             Symphyotrichum foliaceum
                                               Symphyotrichum foliaceum var. apricum
                                               Symphyotrichum foliaceum var. canbyi
                                                     [Aster foliaceus var. burkei]
                                                     [Aster foliaceus var. canbyi]
                                                     [Aster phyllodes]
                                                     [Aster tweedyi]
                                               Symphyotrichum foliaceum var. foliaceum
                                                     [Aster foliaceus var. hesperius]
                                                     [Aster foliaceus var. lyallii]
                                                     [Aster foliaceus var. sublinearis]
                                                     [Aster foliaceus]
                                               Symphyotrichum foliaceum var. parryi
                                                     [Aster ascendens var. parryi]
                                                     [Aster diabolicus]
                                                     [Aster foliaceus var. frondeus]
                                                     [Aster foliaceus var. parryi]
                                                     [Aster foliaceus var. subpetiolatus]
                                                     [Aster frondeus]
                                             Symphyotrichum fontinale
                                             Symphyotrichum frondosum
                                                   [Aster frondosus]
                                                   [Brachyactis frondosa]
                                                   [Tripolium frondosum]
                                             Symphyotrichum georgianum
                                             Symphyotrichum grandiflorum
                                             Symphyotrichum greatae
                                             Symphyotrichum hallii
                                             Symphyotrichum hendersonii
                                             Symphyotrichum jessicae
                                             Symphyotrichum kralii
                                             Symphyotrichum laeve
                                               Symphyotrichum laeve var. concinnum
                                               Symphyotrichum laeve var. geyeri
                                                     [Aster geyeri]
                                                     [Aster laevis var. geyeri]
                                                     [Aster laevis var. guadalupensis]
                                                     [Aster pickettianus]
                                               Symphyotrichum laeve var. laeve
                                                     [Aster falcidens]
                                                     [Aster laevis var. falcatus]
                                                     [Aster laevis]
                                                     [Aster steeleorum]
                                               Symphyotrichum laeve var. purpuratum
                                             Symphyotrichum lanceolatum
                                               Symphyotrichum lanceolatum var. hesperium
                                                     [Aster hesperius var. laetevirens]
                                                     [Aster hesperius var. wootonii]
                                                     [Aster hesperius]
                                                     [Aster laetevirens]
                                                     [Aster lanceolatus ssp. hesperius]
                                                     [Aster osterhoutii]
                                                     [Aster wootonii]
                                                     [Symphyotrichum hesperium]
                                                     [Symphyotrichum lanceolatum ssp. hesperium]
                                               Symphyotrichum lanceolatum var. hirsuticaule
                                               Symphyotrichum lanceolatum var. interior
                                               Symphyotrichum lanceolatum var. lanceolatum
                                                     [Aster bellidiflorus]
                                                     [Aster interior]
                                                     [Aster lamarckianus]
                                                     [Aster lanceolatus ssp. interior]
                                                     [Aster lanceolatus ssp. simplex]
                                                     [Aster lanceolatus var. hirsuticaulis]
                                                     [Aster lanceolatus var. interior]
                                                     [Aster lanceolatus var. latifolius]
                                                     [Aster lanceolatus var. simplex]
                                                     [Aster laxus]
                                                     [Aster paniculatus var. simplex]
                                                     [Aster paniculatus]
                                                     [Aster simplex var. estuarinus]
                                                     [Aster simplex var. interior]
                                                     [Aster simplex var. ramosissimus]
                                                     [Aster simplex]
                                                     [Aster tenuifolius var. ramosissimus]
                                                     [Symphyotrichum lanceolatum ssp. lanceolatum]
                                                     [Symphyotrichum simplex]
                                               Symphyotrichum lanceolatum var. latifolium
                                             Symphyotrichum lateriflorum
                                               Symphyotrichum lateriflorum var. angustifolium
                                               Symphyotrichum lateriflorum var. flagellare
                                               Symphyotrichum lateriflorum var. hirsuticaule
                                               Symphyotrichum lateriflorum var. horizontale
                                               Symphyotrichum lateriflorum var. lateriflorum
                                               Symphyotrichum lateriflorum var. spatelliforme
                                               Symphyotrichum lateriflorum var. tenuipes
                                             Symphyotrichum laurentianum
                                             Symphyotrichum lentum
                                             Symphyotrichum leone
                                                   [Aster leonis]
                                             Symphyotrichum lowrieanum
                                             Symphyotrichum lucayanum
                                                   [Aster lucayanus]
                                             Symphyotrichum molle
                                             Symphyotrichum nahanniense
                                             Symphyotrichum novae-angliae
                                                   [Aster novae-angliae]
                                                   [Lasallea novae-angliae]
                                                   [Virgulus novae-angliae]
                                             Symphyotrichum novi-belgii
                                               Symphyotrichum novi-belgii var. crenifolium
                                               Symphyotrichum novi-belgii var. elodes
                                               Symphyotrichum novi-belgii var. novi-belgii
                                                     [Aster eminens]
                                                     [Aster junceus]
                                                     [Aster longifolius var. villicaulis]
                                                     [Aster longifolius]
                                                     [Symphyotrichum longifolium]
                                               Symphyotrichum novi-belgii var. novibelgii
                                               Symphyotrichum novi-belgii var. tardiflorum
                                               Symphyotrichum novi-belgii var. villicaule
                                             Symphyotrichum oblongifolium
                                                   [Aster kumleinii]
                                                   [Aster oblongifolius var. angustatus]
                                                   [Aster oblongifolius var. orientis]
                                                   [Aster oblongifolius var. rigidulus]
                                                   [Aster oblongifolius]
                                                   [Lasallea oblongifolia]
                                                   [Virgulus oblongifolius]
                                             Symphyotrichum ontarione
                                               Symphyotrichum ontarione var. glabratum
                                             Symphyotrichum ontarionis
                                               Symphyotrichum ontarionis var. glabratum
                                               Symphyotrichum ontarionis var. ontarionis
                                             Symphyotrichum oolentangiense
                                               Symphyotrichum oolentangiense var. oolentangiense
                                               Symphyotrichum oolentangiense var. poaceum
                                             Symphyotrichum parviceps
                                             Symphyotrichum patens
                                               Symphyotrichum patens var. gracile
                                               Symphyotrichum patens var. patens
                                                     [Aster patens var. floridanus]
                                                     [Aster patens]
                                                     [Lasallea patens]
                                                     [Virgulus patens var. gracilis]
                                                     [Virgulus patens var. patentissimus]
                                                     [Virgulus patens]
                                               Symphyotrichum patens var. patentissimum
                                             Symphyotrichum phlogifolium
                                                   [Aster patens var. phlogifolius]
                                                   [Aster phlogifolius]
                                                   [Virgulus patens var. phlogifolius]
                                             Symphyotrichum pilosum
                                               Symphyotrichum pilosum var. pilosum
                                               Symphyotrichum pilosum var. pringlei
                                             Symphyotrichum plumosum
                                             Symphyotrichum porteri
                                                   [Aster ericoides var. strictus]
                                                   [Aster porteri]
                                             Symphyotrichum potosinum
                                                   [Aster lemmonii]
                                                   [Aster potosinus]
                                             Symphyotrichum praealtum
                                                   [Aster coerulescens]
                                               Symphyotrichum praealtum var. angustior
                                               Symphyotrichum praealtum var. nebraskense
                                               Symphyotrichum praealtum var. praealtum
                                                     [Aster caerulescens]
                                                     [Aster novi-belgii var. litoreus]
                                                     [Aster praealtus var. angustior]
                                                     [Aster praealtus var. caerulescens]
                                                     [Aster praealtus var. imbricatior]
                                                     [Aster praealtus var. texicola]
                                                     [Aster praealtus]
                                                     [Aster salicifolius]
                                                     [Symphyotrichum novi-belgii var. litoreum]
                                                     [Symphyotrichum praealtum var. texicola]
                                               Symphyotrichum praealtum var. subasperum
                                             Symphyotrichum pratense
                                             Symphyotrichum prenanthoides
                                             Symphyotrichum priceae
                                             Symphyotrichum puniceum
                                               Symphyotrichum puniceum var. calderi
                                               Symphyotrichum puniceum var. puniceum
                                               Symphyotrichum puniceum var. scabricaule
                                             Symphyotrichum pygmaeum
                                             Symphyotrichum racemosum
                                               Symphyotrichum racemosum var. subdumosum
                                             Symphyotrichum retroflexum
                                             Symphyotrichum rhiannon
                                             Symphyotrichum robynsianum
                                             Symphyotrichum sericeum
                                                   [Aster sericeus]
                                                   [Lasallea sericea ssp. pratensis]
                                                   [Lasallea sericea]
                                                   [Virgulus sericeus]
                                             Symphyotrichum shortii
                                             Symphyotrichum simmondsii
                                             Symphyotrichum spathulatum
                                               Symphyotrichum spathulatum var. intermedium
                                               Symphyotrichum spathulatum var. spathulatum
                                                     [Aster ascendens var. fremontii]
                                                     [Aster delectabilis]
                                                     [Aster fremontii var. parishii]
                                                     [Aster fremontii]
                                                     [Aster occidentalis var. delectabilis]
                                                     [Aster occidentalis var. fremontii]
                                                     [Aster occidentalis var. intermedius]
                                                     [Aster occidentalis var. parishii]
                                                     [Aster occidentalis]
                                                     [Aster spathulatus]
                                                     [Symphyotrichum spathulatum var. fremontii]
                                                     [Tripolium occidentale]
                                               Symphyotrichum spathulatum var. yosemitanum
                                             Symphyotrichum squamatum
                                             Symphyotrichum subgeminatum
                                             Symphyotrichum subspicatum
                                               Symphyotrichum subspicatum var. grayi
                                               Symphyotrichum subspicatum var. subspicatum
                                             Symphyotrichum subulatum
                                                   [Aster subulatus var. euroauster]
                                                   [Aster subulatus var. obtusifolius]
                                               Symphyotrichum subulatum var. elongatum
                                                     [Aster bahamensis]
                                               Symphyotrichum subulatum var. parviflorum
                                                     [Aster inconspicuus]
                                                     [Aster subulatus var. cubensis]
                                                     [Symphyotrichum expansum]
                                                     [Tripolium subulatum var. parviflorum]
                                               Symphyotrichum subulatum var. squamatum
                                               Symphyotrichum subulatum var. subulatum
                                               Symphyotrichum subulatum var. ligulatum
                                             Symphyotrichum tenuifolium
                                               Symphyotrichum tenuifolium var. aphyllum
                                               Symphyotrichum tenuifolium var. tenuifolium
                                             Symphyotrichum tradescantii
                                             Symphyotrichum turbinellum
                                             Symphyotrichum undulatum
                                             Symphyotrichum urophyllum
                                             Symphyotrichum vahlii
                                               Symphyotrichum vahlii var. vahlii
                                             Symphyotrichum walteri
                                             Symphyotrichum welshii
                                                   [Aster welshii]
                                             Symphyotrichum x amethystinum
                                             Symphyotrichum x batesii
                                             Symphyotrichum x columbianum
                                             Symphyotrichum x finkii
                                             Symphyotrichum x gravesii
                                             Symphyotrichum x longulum
                                             Symphyotrichum x salignum
                                             Symphyotrichum x schistosum
                                             Symphyotrichum x tardiflorum
                                             Symphyotrichum x versicolor
                                             Symphyotrichum x woldenii
                                             Symphyotrichum yukonense
                                     Syncretocarpus
                                     Synedrella
                                             Synedrella nodiflora
                                                   [Verbesina nodiflora]
                                     Synedrellopsis
                                     Synosma
                                             Synosma suaveolens
                                     Syntrichopappus
                                             Syntrichopappus fremontii
                                             Syntrichopappus lemmonii
                                     Tafalla
                                     Tagetes
                                             Tagetes campanulata
                                             Tagetes coronopifolia
                                             Tagetes erecta
                                                   [Tagetes major]
                                             Tagetes filifolia
                                             Tagetes foetidissima
                                             Tagetes jaliscensis
                                             Tagetes lacera
                                             Tagetes lemmonii
                                                   [Tagetes alamensis]
                                                   [Tagetes palmeri]
                                             Tagetes lucida
                                             Tagetes lunulata
                                             Tagetes micrantha
                                                   [Tagetes fragrantissima]
                                             Tagetes microglossa
                                             Tagetes minima
                                             Tagetes minuta
                                                   [Tagetes bonariensis]
                                                   [Tagetes glandulifera]
                                                   [Tagetes glandulosa]
                                                   [Tagetes porophylla]
                                             Tagetes parryi
                                             Tagetes patula
                                                   [Tagetes corymbosa]
                                                   [Tagetes remotiflora]
                                                   [Tagetes signata]
                                                   [Tagetes tenuifolia]
                                             Tagetes pringlei
                                             Tagetes pusilla
                                             Tagetes stenophylla
                                             Tagetes subulata
                                             Tagetes triradiata
                                             Tagetes wislizeni
                                     Talamancalia
                                     Tamaulipa
                                             Tamaulipa azurea
                                     Tanacetum
                                             Tanacetum bajacalifornicum
                                             Tanacetum balsamita
                                                   [Balsamita major var. tanacetoides]
                                                   [Balsamita major]
                                                   [Chrysanthemum balsamita var. tanacetoides]
                                                   [Chrysanthemum balsamita]
                                                   [Pyrethrum majus]
                                             Tanacetum bipinnatum
                                               Tanacetum bipinnatum ssp. bipinnatum
                                               Tanacetum bipinnatum ssp. huronense
                                             Tanacetum camphoratum
                                             Tanacetum capitatum
                                             Tanacetum chiliophyllum
                                             Tanacetum cinerariifolium
                                             Tanacetum coccineum
                                             Tanacetum compactum
                                             Tanacetum corymbosum
                                             Tanacetum douglasii
                                             Tanacetum huronense
                                               Tanacetum huronense var. bifarium
                                               Tanacetum huronense var. floccosum
                                               Tanacetum huronense var. johannense
                                               Tanacetum huronense var. terrae-novae
                                             Tanacetum nuttallii
                                             Tanacetum parthenium
                                                   [Matricaria parthenium]
                                             Tanacetum potentilloides
                                               Tanacetum potentilloides var. nitrophilum
                                             Tanacetum santolinoides
                                             Tanacetum simplex
                                             Tanacetum vulgare
                                                   [Chrysanthemum uliginosum]
                                                   [Chrysanthemum vulgare]
                                                   [Tanacetum boreale]
                                                   [Tanacetum vulgare var. crispum]
                                     Taraxacum
                                             Taraxacum alaskanum
                                             Taraxacum alatum
                                             Taraxacum ambigens
                                               Taraxacum ambigens var. flutius
                                             Taraxacum amphiphron
                                             Taraxacum arcticum
                                             Taraxacum arctogenum
                                             Taraxacum brachyceras
                                             Taraxacum californicum
                                             Taraxacum carneocoloratum
                                             Taraxacum carthamopsis
                                             Taraxacum ceratophorum
                                             Taraxacum dumetorum
                                             Taraxacum eriophorum
                                             Taraxacum erythrospermum
                                                   [Taraxacum laevigatum]
                                             Taraxacum eurylepium
                                             Taraxacum holmenianum
                                             Taraxacum hyparcticum
                                             Taraxacum hyperboreum
                                             Taraxacum integratum
                                             Taraxacum lacerum
                                             Taraxacum lapponicum
                                             Taraxacum lateritium
                                             Taraxacum latilobum
                                                   [Taraxacum officinale ssp. officinale]
                                             Taraxacum latispinulosum
                                             Taraxacum laurentianum
                                             Taraxacum leucanthum
                                             Taraxacum longii
                                             Taraxacum mackenziense
                                             Taraxacum malteanum
                                             Taraxacum maurolepium
                                             Taraxacum mitratum
                                             Taraxacum multesimum
                                             Taraxacum naevosum
                                             Taraxacum officinale
                                               Taraxacum officinale ssp. ceratophorum
                                             Taraxacum olympicum
                                             Taraxacum ovinum
                                             Taraxacum palustre
                                                   [Taraxacum turfosum]
                                             Taraxacum paucisquamosum
                                             Taraxacum pellianum
                                             Taraxacum phymatocarpum
                                             Taraxacum pseudonorvegicum
                                             Taraxacum pumilum
                                             Taraxacum purpuridens
                                             Taraxacum scopulorum
                                                   [Taraxacum lyratum]
                                             Taraxacum spectabile
                                             Taraxacum stevenii
                                             Taraxacum taraxacum
                                             Taraxacum torngatense
                                             Taraxacum trigonolobum
                                             Taraxacum umbrinum
                                     Telanthophora
                                     Tephroseris
                                             Tephroseris atropurpurea
                                               Tephroseris atropurpurea ssp. atropurpurea
                                               Tephroseris atropurpurea ssp. frigida
                                               Tephroseris atropurpurea ssp. tomentosa
                                             Tephroseris frigida
                                             Tephroseris integrifolia
                                               Tephroseris integrifolia ssp. atropurpurea
                                             Tephroseris kjellmanii
                                             Tephroseris lindstroemii
                                             Tephroseris palustris
                                             Tephroseris tundricola
                                               Tephroseris tundricola var. lindstroemii
                                             Tephroseris yukonensis
                                     Tepion
                                             Tepion alatum
                                     Tessaria
                                             Tessaria absinthioides
                                             Tessaria borealis
                                             Tessaria integrifolia
                                     Tetrachyron
                                             Tetrachyron grayi
                                             Tetrachyron manicatum
                                     Tetradymia
                                             Tetradymia argyraea
                                             Tetradymia axillaris
                                               Tetradymia axillaris var. axillaris
                                               Tetradymia axillaris var. longispina
                                                     [Tetradymia spinosa var. longispina]
                                             Tetradymia canescens
                                                   [Tetradymia canescens var. inermis]
                                             Tetradymia comosa
                                               Tetradymia comosa ssp. tetrameres
                                             Tetradymia filifolia
                                             Tetradymia glabrata
                                             Tetradymia inermis
                                             Tetradymia linearis
                                             Tetradymia nuttallii
                                             Tetradymia spinosa
                                             Tetradymia stenolepis
                                             Tetradymia tetrameres
                                     Tetragonotheca
                                             Tetragonotheca helianthoides
                                             Tetragonotheca ludoviciana
                                             Tetragonotheca repanda
                                                   [Halea repanda]
                                             Tetragonotheca texana
                                     Tetramolopium
                                             Tetramolopium arbusculum
                                             Tetramolopium arenarium
                                               Tetramolopium arenarium ssp. arenarium
                                               Tetramolopium arenarium ssp. laxum
                                               Tetramolopium arenarium var. dentatum
                                             Tetramolopium calcisabulorum
                                             Tetramolopium capillare
                                             Tetramolopium consanguineum
                                               Tetramolopium consanguineum ssp. consanguineum
                                               Tetramolopium consanguineum ssp. leptophyllum
                                             Tetramolopium conyzoides
                                               Tetramolopium conyzoides var. dentatum
                                             Tetramolopium filiforme
                                               Tetramolopium filiforme var. filiforme
                                               Tetramolopium filiforme var. polyphyllum
                                             Tetramolopium humile
                                               Tetramolopium humile ssp. haleakalae
                                               Tetramolopium humile ssp. humile
                                               Tetramolopium humile var. skottsbergii
                                             Tetramolopium lepidotum
                                               Tetramolopium lepidotum ssp. arbusculum
                                               Tetramolopium lepidotum ssp. lepidotum
                                               Tetramolopium lepidotum var. luxurians
                                             Tetramolopium polyphyllum
                                             Tetramolopium remyi
                                             Tetramolopium rockii
                                               Tetramolopium rockii var. calcisabulorum
                                               Tetramolopium rockii var. rockii
                                             Tetramolopium sylvae
                                             Tetramolopium tenerrimum
                                     Tetraneuris
                                             Tetraneuris acaulis
                                                   [Hymenoxys acaulis]
                                               Tetraneuris acaulis var. acaulis
                                                     [Actinea acaulis var. simplex]
                                                     [Actinea acaulis]
                                                     [Actinella acaulis]
                                                     [Hymenoxys acaulis var. acaulis]
                                                     [Tetraneuris simplex]
                                               Tetraneuris acaulis var. arizonica
                                                     [Actinea acaulis var. arizonica]
                                                     [Hymenoxys acaulis var. arizonica]
                                                     [Hymenoxys acaulis var. nana]
                                                     [Tetraneuris acaulis var. nana]
                                                     [Tetraneuris arizonica]
                                               Tetraneuris acaulis var. caespitosa
                                                     [Hymenoxys acaulis var. caespitosa]
                                                     [Hymenoxys acaulis var. lanata]
                                                     [Tetraneuris brevifolia]
                                               Tetraneuris acaulis var. epunctata
                                                     [Hymenoxys acaulis var. epunctata]
                                                     [Tetraneuris crandallii]
                                                     [Tetraneuris epunctata]
                                             Tetraneuris angustata
                                             Tetraneuris angustifolia
                                             Tetraneuris argentea
                                                   [Actinella argentea]
                                                   [Hymenoxys argentea]
                                             Tetraneuris formosa
                                             Tetraneuris herbacea
                                                   [Hymenoxys acaulis var. glabra]
                                                   [Hymenoxys herbacea]
                                             Tetraneuris intermedia
                                             Tetraneuris ivesiana
                                                   [Hymenoxys acaulis var. ivesiana]
                                                   [Hymenoxys argentea var. ivesiana]
                                                   [Hymenoxys ivesiana]
                                                   [Tetraneuris mancosensis]
                                                   [Tetraneuris pilosa]
                                             Tetraneuris linearifolia
                                               Tetraneuris linearifolia var. arenicola
                                               Tetraneuris linearifolia var. linearifolia
                                                     [Hymenoxys linearifolia]
                                             Tetraneuris scaposa
                                               Tetraneuris scaposa var. argyrocaulon
                                               Tetraneuris scaposa var. linearis
                                               Tetraneuris scaposa var. scaposa
                                                     [Hymenoxys glabra]
                                                     [Hymenoxys scaposa var. argyrocaulon]
                                                     [Hymenoxys scaposa var. glabra]
                                                     [Hymenoxys scaposa var. linearis]
                                                     [Hymenoxys scaposa var. villosa]
                                                     [Hymenoxys scaposa]
                                                     [Tetraneuris fastigiata]
                                                     [Tetraneuris glabra]
                                                     [Tetraneuris stenophylla]
                                               Tetraneuris scaposa var. villosa
                                             Tetraneuris torreyana
                                                   [Hymenoxys depressa]
                                                   [Hymenoxys torreyana]
                                                   [Tetraneuris depressa]
                                             Tetraneuris trinervata
                                             Tetraneuris turneri
                                                   [Hymenoxys turneri]
                                             Tetraneuris verdiensis
                                     Thelechitonia
                                             Thelechitonia gracilis
                                     Thelesperma
                                             Thelesperma ambiguum
                                                   [Thelesperma fraternum]
                                                   [Thelesperma megapotamicum var. ambiguum]
                                             Thelesperma burridgeanum
                                             Thelesperma curvicarpum
                                             Thelesperma filifolium
                                               Thelesperma filifolium var. filifolium
                                               Thelesperma filifolium var. intermedium
                                             Thelesperma flavodiscum
                                             Thelesperma formosum
                                             Thelesperma intermedium
                                             Thelesperma longipes
                                             Thelesperma marginatum
                                             Thelesperma megapotamicum
                                                   [Bidens megapotamica]
                                                   [Thelesperma gracile]
                                             Thelesperma nuecense
                                             Thelesperma pubescens
                                             Thelesperma simplicifolium
                                             Thelesperma subaequale
                                             Thelesperma subnudum
                                                   [Thelesperma pubescens var. caespitosum]
                                               Thelesperma subnudum var. alpinum
                                               Thelesperma subnudum var. caespitosum
                                               Thelesperma subnudum var. maliterrimum
                                               Thelesperma subnudum var. marginatum
                                               Thelesperma subnudum var. subnudum
                                             Thelesperma tenue
                                             Thelesperma trifidum
                                             Thelesperma windhamii
                                     Thurovia
                                             Thurovia triflora
                                     Thymophylla
                                             Thymophylla acerosa
                                                   [Dyssodia acerosa]
                                             Thymophylla anomala
                                                   [Dyssodia anomala]
                                             Thymophylla aurea
                                               Thymophylla aurea var. aurea
                                                     [Dyssodia aurea]
                                                     [Lowellia aurea]
                                               Thymophylla aurea var. polychaeta
                                                     [Dyssodia aurea var. polychaeta]
                                                     [Dyssodia polychaeta]
                                                     [Thymophylla polychaeta]
                                             Thymophylla belenidium
                                             Thymophylla concinna
                                                   [Dyssodia concinna]
                                             Thymophylla micropoides
                                             Thymophylla pentachaeta
                                                   [Dyssodia pentachaeta]
                                               Thymophylla pentachaeta var. belenidium
                                                     [Dyssodia belenidium]
                                                     [Dyssodia pentachaeta var. belenidium]
                                                     [Dyssodia thurberi]
                                               Thymophylla pentachaeta var. hartwegii
                                                     [Dyssodia hartwegii]
                                                     [Dyssodia pentachaeta ssp. hartwegii]
                                                     [Dyssodia pentachaeta var. hartwegii]
                                               Thymophylla pentachaeta var. pentachaeta
                                                     [Hymenatherum pentachaetum]
                                               Thymophylla pentachaeta var. puberula
                                                     [Dyssodia pentachaeta var. puberula]
                                             Thymophylla pringlei
                                             Thymophylla setifolia
                                               Thymophylla setifolia var. greggii
                                               Thymophylla setifolia var. radiata
                                                     [Dyssodia setifolia var. greggii]
                                                     [Dyssodia setifolia var. radiata]
                                               Thymophylla setifolia var. setifolia
                                                     [Dyssodia setifolia]
                                             Thymophylla tenuifolia
                                             Thymophylla tenuiloba
                                               Thymophylla tenuiloba var. tenuiloba
                                               Thymophylla tenuiloba var. texana
                                               Thymophylla tenuiloba var. treculii
                                               Thymophylla tenuiloba var. wrightii
                                             Thymophylla tephroleuca
                                     Tilesia
                                     Tithonia
                                             Tithonia auriculata
                                             Tithonia brachypappa
                                             Tithonia calva
                                               Tithonia calva var. auriculata
                                               Tithonia calva var. calva
                                               Tithonia calva var. lancifolia
                                             Tithonia diversifolia
                                             Tithonia fruticosa
                                             Tithonia pedunculata
                                             Tithonia rotundifolia
                                                   [Tagetes rotundifolia]
                                                   [Tithonia speciosa]
                                             Tithonia thurberi
                                             Tithonia tubaeformis
                                             Tithonia tubiformis
                                     Toiyabea
                                             Toiyabea alpina
                                     Tolpis
                                             Tolpis barbata
                                             Tolpis umbellata
                                             Tolpis virgata
                                     Tomanthea
                                             Tomanthea daralaghezica
                                     Tomentaurum
                                             Tomentaurum niveum
                                     Tonestus
                                             Tonestus aberrans
                                             Tonestus alpinus
                                             Tonestus eximius
                                             Tonestus graniticus
                                                   [Haplopappus graniticus]
                                             Tonestus kingii
                                               Tonestus kingii var. barnebyana
                                               Tonestus kingii var. kingii
                                             Tonestus lyallii
                                             Tonestus microcephalus
                                                   [Haplopappus microcephalus]
                                             Tonestus peirsonii
                                             Tonestus pygmaeus
                                                   [Haplopappus pygmaeus]
                                     Townsendia
                                             Townsendia alpigena
                                               Townsendia alpigena var. alpigena
                                               Townsendia alpigena var. caelilinensis
                                               Townsendia alpigena var. minima
                                             Townsendia annua
                                             Townsendia anomala
                                             Townsendia aprica
                                             Townsendia bakeri
                                             Townsendia condensata
                                               Townsendia condensata var. anomala
                                               Townsendia condensata var. condensata
                                             Townsendia eximia
                                                   [Townsendia vreelandii]
                                             Townsendia exscapa
                                                   [Aster exscapus]
                                                   [Townsendia intermedia]
                                                   [Townsendia sericea]
                                             Townsendia fendleri
                                             Townsendia florifer
                                               Townsendia florifer var. watsonii
                                             Townsendia florifera
                                               Townsendia florifera var. watsonii
                                             Townsendia formosa
                                                   [Townsendia pinetorum]
                                             Townsendia glabella
                                             Townsendia goodrichii
                                             Townsendia grandiflora
                                             Townsendia gypsophila
                                             Townsendia hookeri
                                             Townsendia incana
                                                   [Townsendia arizonica]
                                             Townsendia jonesii
                                               Townsendia jonesii var. jonesii
                                                     [Townsendia mensana var. jonesii]
                                               Townsendia jonesii var. lutea
                                               Townsendia jonesii var. tumulosa
                                             Townsendia leptotes
                                                   [Townsendia sericea var. leptotes]
                                             Townsendia mensana
                                             Townsendia mexicana
                                             Townsendia microcephala
                                             Townsendia minima
                                             Townsendia montana
                                               Townsendia montana var. caelilinensis
                                               Townsendia montana var. minima
                                             Townsendia nuttallii
                                             Townsendia parryi
                                             Townsendia rothrockii
                                             Townsendia scapigera
                                               Townsendia scapigera var. caulescens
                                             Townsendia smithii
                                             Townsendia spathulata
                                             Townsendia strigosa
                                             Townsendia texensis
                                     Tracyina
                                             Tracyina rostrata
                                     Tragoceros
                                             Tragoceros mocinianus
                                             Tragoceros zinnioides
                                     Tragopogon
                                             Tragopogon dubius
                                                   [Tragopogon dubius ssp. major]
                                                   [Tragopogon major]
                                             Tragopogon floccosus
                                             Tragopogon hybridus
                                             Tragopogon kemulariae
                                             Tragopogon lamottei
                                                   [Tragopogon orientalis]
                                                   [Tragopogon pratensis ssp. orientalis]
                                             Tragopogon mirabilis
                                             Tragopogon mirus
                                             Tragopogon miscellus
                                             Tragopogon porrifolius
                                             Tragopogon pratensis
                                             Tragopogon x crantzii
                                             Tragopogon x neohybridus
                                     Trichocline
                                     Trichocoronis
                                             Trichocoronis rivularis
                                             Trichocoronis wrightii
                                                   [Trichocoronis riparia]
                                               Trichocoronis wrightii var. wigginsii
                                               Trichocoronis wrightii var. wrightii
                                     Trichocoryne
                                             Trichocoryne connata
                                     Trichogonia
                                     Tricholepis
                                             Tricholepis nigrescens
                                               Tricholepis nigrescens var. donnellii
                                     Trichoptilium
                                             Trichoptilium incisum
                                     Trichospira
                                     Tridax
                                             Tridax accedens
                                             Tridax balbisioides
                                             Tridax bicolor
                                             Tridax brachylepis
                                             Tridax candidissima
                                             Tridax coronopifolia
                                             Tridax dubia
                                             Tridax erecta
                                             Tridax leptophylla
                                             Tridax luisana
                                             Tridax mexicana
                                             Tridax platyphylla
                                             Tridax procumbens
                                             Tridax tenuifolia
                                             Tridax trilobata
                                             Tridax yecorana
                                     Trigonospermum
                                             Trigonospermum annuum
                                             Trigonospermum floribundum
                                             Trigonospermum melampodioides
                                     Trilisa
                                             Trilisa odoratissima
                                             Trilisa paniculata
                                     Trimorpha
                                             Trimorpha acris
                                               Trimorpha acris var. asteroides
                                               Trimorpha acris var. debilis
                                               Trimorpha acris var. kamtschatica
                                             Trimorpha borealis
                                             Trimorpha elata
                                             Trimorpha elongata
                                             Trimorpha scotteri
                                     Triniteurybia
                                             Triniteurybia aberrans
                                     Tripleurospermum
                                             Tripleurospermum inodorum
                                             Tripleurospermum maritimum
                                               Tripleurospermum maritimum ssp. maritimum
                                               Tripleurospermum maritimum ssp. phaeocephalum
                                                     [Matricaria ambigua]
                                                     [Matricaria hookeri]
                                                     [Matricaria maritima ssp. phaeocephala]
                                                     [Matricaria maritima var. nana]
                                                     [Tripleurospermum phaeocephalum]
                                             Tripleurospermum perforatum
                                     Tripolium
                                             Tripolium oregonum
                                             Tripolium pannonicum
                                                   [Aster tripolium ssp. pannonicus]
                                                   [Aster tripolium]
                                     Tripteris
                                             Tripteris vaillantii
                                     Trixis
                                             Trixis angustifolia
                                             Trixis cacalioides
                                             Trixis californica
                                               Trixis californica var. californica
                                             Trixis divaricata
                                             Trixis frutescens
                                             Trixis hyposericea
                                             Trixis inula
                                             Trixis longifolia
                                             Trixis michuacana
                                               Trixis michuacana var. longifolia
                                             Trixis peninsularis
                                             Trixis pringlei
                                             Trixis pterocaulis
                                             Trixis radialis
                                             Trixis suffruticosa
                                             Trixis vauthieri
                                             Trixis wrightii
                                     Troximon
                                             Troximon apargioides
                                             Troximon arizonicum
                                             Troximon aurantiacum
                                             Troximon plebeium
                                     Tuberostylis
                                     Tuckermannia
                                     Tussilago
                                             Tussilago farfara
                                             Tussilago nutans
                                     Uleophytum
                                     Unamia
                                             Unamia alba
                                             Unamia lutescens
                                     Unxia
                                     Urbinella
                                             Urbinella palmeri
                                     Urolepis
                                     Uropappus
                                             Uropappus lindleyi
                                                   [Microseris lindleyi]
                                                   [Microseris linearifolia]
                                                   [Uropappus linearifolius]
                                     Urospermum
                                             Urospermum echioides
                                             Urospermum picroides
                                     Ursinia
                                             Ursinia anthemoides
                                             Ursinia calenduliflora
                                             Ursinia nana
                                     Vanclevea
                                     Varilla
                                             Varilla mexicana
                                               Varilla mexicana var. gypsophila
                                             Varilla texana
                                     Varthemia
                                             Varthemia montana
                                     Vasquezia
                                     Venegasia
                                             Venegasia carpesioides
                                             Venegasia deltoidea
                                     Venidium
                                             Venidium fastuosum
                                     Verbesina
                                             Verbesina alata
                                             Verbesina alcabrerae
                                             Verbesina alternifolia
                                                   [Actinomeris alternifolia]
                                                   [Ridan alternifolia]
                                             Verbesina angustifolia
                                             Verbesina apiculata
                                             Verbesina apleura
                                             Verbesina aristata
                                             Verbesina aspera
                                                   [Chaenocephalus lobatus]
                                             Verbesina australis
                                             Verbesina callilepis
                                             Verbesina capitaneja
                                             Verbesina chapmanii
                                             Verbesina chihuahuensis
                                             Verbesina cinerascens
                                             Verbesina corral-diazii
                                             Verbesina crocata
                                             Verbesina discoidea
                                             Verbesina dissita
                                             Verbesina encelioides
                                               Verbesina encelioides ssp. exauriculata
                                                     [Verbesina encelioides var. exauriculata]
                                                     [Verbesina exauriculata]
                                                     [Ximenesia encelioides var. exauriculata]
                                                     [Ximenesia exauriculata]
                                             Verbesina fastigiata
                                             Verbesina fayi
                                             Verbesina felgeri
                                             Verbesina gentryi
                                             Verbesina gigantea
                                             Verbesina gracilipes
                                             Verbesina grayi
                                             Verbesina greenmanii
                                             Verbesina hastata
                                             Verbesina helianthoides
                                             Verbesina heterocarpa
                                             Verbesina heterophylla
                                             Verbesina hypomalaca
                                             Verbesina jacksonii
                                             Verbesina klattii
                                             Verbesina laciniata
                                             Verbesina lanata
                                             Verbesina langlassei
                                             Verbesina lavenia
                                             Verbesina liebmannii
                                             Verbesina lindenii
                                             Verbesina lindheimeri
                                             Verbesina longifolia
                                                   [Actinomeris longifolia]
                                             Verbesina lottiana
                                             Verbesina lundellii
                                             Verbesina microptera
                                                   [Verbesina encelioides ssp. encelioides]
                                             Verbesina montanoifolia
                                               Verbesina montanoifolia var. leptopoda
                                             Verbesina myriocephala
                                             Verbesina nana
                                                   [Wootonella nana]
                                                   [Ximenesia encelioides var. nana]
                                                   [Ximenesia nana]
                                             Verbesina neriifolia
                                             Verbesina nervosa
                                                   [Chaenocephalus venosus]
                                             Verbesina nudicaulis
                                             Verbesina occidentalis
                                             Verbesina oerstediana
                                             Verbesina oligantha
                                             Verbesina oligocephala
                                             Verbesina olivacea
                                             Verbesina olsenii
                                             Verbesina oncophora
                                             Verbesina oreophila
                                             Verbesina ovatifolia
                                             Verbesina palmeri
                                               Verbesina palmeri ssp. oligocephala
                                             Verbesina pantoptera
                                             Verbesina parviflora
                                               Verbesina parviflora var. zacatecana
                                             Verbesina pedunculosa
                                             Verbesina peninsularis
                                             Verbesina persicifolia
                                             Verbesina pleistocephala
                                             Verbesina propinqua
                                                   [Chaenocephalus propinquus]
                                             Verbesina pustulata
                                             Verbesina robinsonii
                                             Verbesina rothrockii
                                                   [Ancistrophora wrightii]
                                                   [Verbesina longipes]
                                             Verbesina rupestris
                                                   [Chaenocephalus rupestris]
                                             Verbesina scabrida
                                             Verbesina scaposa
                                             Verbesina sericea
                                             Verbesina serrata
                                             Verbesina sinaloensis
                                             Verbesina sinuata
                                             Verbesina sphaerocephala
                                             Verbesina stricta
                                             Verbesina strotheri
                                             Verbesina suncho
                                             Verbesina synotis
                                             Verbesina tetraptera
                                             Verbesina texana
                                             Verbesina turbacensis
                                             Verbesina virgata
                                             Verbesina virginica
                                               Verbesina virginica var. insularis
                                               Verbesina virginica var. laciniata
                                               Verbesina virginica var. virginica
                                             Verbesina walteri
                                             Verbesina warei
                                     Vernonia
                                             Vernonia acaulis
                                             Vernonia alamanii
                                             Vernonia albicaulis
                                                   [Lepidaploa glabra]
                                             Vernonia angustifolia
                                               Vernonia angustifolia ssp. angustifolia
                                               Vernonia angustifolia ssp. mohrii
                                               Vernonia angustifolia ssp. scaberrima
                                               Vernonia angustifolia var. mohrii
                                               Vernonia angustifolia var. scaberrima
                                             Vernonia anthelmintica
                                             Vernonia arborescens
                                             Vernonia arctioides
                                             Vernonia argyropappa
                                             Vernonia arkansana
                                             Vernonia autumnalis
                                             Vernonia baldwinii
                                               Vernonia baldwinii ssp. baldwinii
                                               Vernonia baldwinii ssp. interior
                                             Vernonia barbinervis
                                             Vernonia barclayi
                                             Vernonia blodgettii
                                             Vernonia boquerona
                                             Vernonia borinquensis
                                             Vernonia canescens
                                             Vernonia cinerea
                                               Vernonia cinerea var. parviflora
                                             Vernonia cordata
                                               Vernonia cordata var. hooveri
                                             Vernonia crinita
                                             Vernonia ctenophora
                                             Vernonia deppeana
                                             Vernonia durangensis
                                             Vernonia fasciculata
                                               Vernonia fasciculata ssp. corymbosa
                                               Vernonia fasciculata ssp. fasciculata
                                               Vernonia fasciculata var. corymbosa
                                             Vernonia ferruginea
                                             Vernonia flaccidifolia
                                             Vernonia foliosa
                                             Vernonia galamensis
                                             Vernonia gigantea
                                               Vernonia gigantea ssp. gigantea
                                                     [Vernonia altissima var. lilacina]
                                                     [Vernonia altissima var. taeniotricha]
                                                     [Vernonia altissima]
                                               Vernonia gigantea ssp. ovalifolia
                                             Vernonia glauca
                                             Vernonia greggii
                                             Vernonia incana
                                             Vernonia interior
                                             Vernonia jamesii
                                             Vernonia jonesii
                                             Vernonia joyaliae
                                             Vernonia kuntzei
                                             Vernonia larseniae
                                             Vernonia larsenii
                                             Vernonia leiocarpa
                                             Vernonia lettermannii
                                             Vernonia lindheimeri
                                               Vernonia lindheimeri var. leucophylla
                                             Vernonia marginata
                                                   [Vernonia marginata var. tenuifolia]
                                             Vernonia missurica
                                                   [Vernonia aborigina]
                                             Vernonia noveboracensis
                                                   [Vernonia harperi]
                                               Vernonia noveboracensis var. tomentosa
                                             Vernonia oaxacana
                                             Vernonia odoratissima
                                             Vernonia ovalifolia
                                             Vernonia pallens
                                             Vernonia palmeri
                                             Vernonia paniculata
                                             Vernonia patens
                                             Vernonia pauciflora
                                             Vernonia pinguis
                                             Vernonia pinifolia
                                             Vernonia pluvialis
                                             Vernonia pooleae
                                             Vernonia proctori
                                             Vernonia pugana
                                             Vernonia pulchella
                                             Vernonia recurva
                                             Vernonia salicifolia
                                             Vernonia saltensis
                                             Vernonia salvinae
                                             Vernonia scaberrima
                                             Vernonia scorpioides
                                             Vernonia sericea
                                             Vernonia serratuloides
                                               Vernonia serratuloides ssp. serratuloides
                                             Vernonia squamulosa
                                             Vernonia tarchonanthifolia
                                             Vernonia taylorae
                                             Vernonia tequilana
                                             Vernonia texana
                                             Vernonia tortuosa
                                             Vernonia triflosculosa
                                               Vernonia triflosculosa var. palmeri
                                             Vernonia uniflora
                                             Vernonia vernonioides
                                             Vernonia x concinna
                                             Vernonia x dissimilis
                                             Vernonia x georgiana
                                             Vernonia x guadalupensis
                                             Vernonia x illinoensis
                                             Vernonia x peralta
                                             Vernonia x vulturina
                                     Vesicarpa
                                             Vesicarpa potentilloides
                                               Vesicarpa potentilloides var. nitrophilum
                                               Vesicarpa potentilloides var. potentilloides
                                     Vigethia
                                             Vigethia mexicana
                                     Viguiera
                                             Viguiera adenophylla
                                             Viguiera angustifolia
                                             Viguiera bombycina
                                             Viguiera brevifolia
                                             Viguiera buddleiaeformis
                                             Viguiera canescens
                                             Viguiera carterae
                                             Viguiera chenopodina
                                             Viguiera cordata
                                             Viguiera cordifolia
                                             Viguiera decurrens
                                             Viguiera deltoidea
                                                   [Viguiera deltoidea var. genuina]
                                               Viguiera deltoidea var. chenopodina
                                               Viguiera deltoidea var. tastensis
                                               Viguiera deltoidea var. townsendii
                                             Viguiera dentata
                                                   [Helianthus dentatus]
                                               Viguiera dentata var. dentata
                                               Viguiera dentata var. lancifolia
                                             Viguiera ensifolia
                                             Viguiera eriophora
                                             Viguiera excelsa
                                             Viguiera flava
                                               Viguiera flava var. papposa
                                             Viguiera gentryi
                                             Viguiera goldmanii
                                             Viguiera grahamii
                                             Viguiera grammatoglossa
                                             Viguiera greggii
                                             Viguiera helianthoides
                                             Viguiera hypochlora
                                             Viguiera insignis
                                             Viguiera laciniata
                                             Viguiera lanata
                                             Viguiera latibracteata
                                             Viguiera linearis
                                             Viguiera ludens
                                             Viguiera microcephala
                                             Viguiera microphylla
                                             Viguiera montana
                                             Viguiera morelensis
                                             Viguiera palmeri
                                             Viguiera parkinsonii
                                             Viguiera pazensis
                                             Viguiera phenax
                                             Viguiera pinnatilobata
                                             Viguiera porteri
                                             Viguiera pringlei
                                             Viguiera purisimae
                                             Viguiera puruana
                                             Viguiera quinqueradiata
                                             Viguiera reticulata
                                             Viguiera revoluta
                                             Viguiera seemannii
                                             Viguiera similis
                                             Viguiera soliceps
                                             Viguiera stenoloba
                                               Viguiera stenoloba var. chihuahuensis
                                               Viguiera stenoloba var. stenoloba
                                             Viguiera subincisa
                                             Viguiera superaxillaris
                                             Viguiera tenuis
                                             Viguiera tomentosa
                                             Viguiera triangularis
                                     Villasenoria
                                             Villasenoria orcuttii
                                     Vilobia
                                     Virgulaster
                                             Virgulaster bernardinus
                                     Virgulus
                                             Virgulus adnatus
                                             Virgulus campestris
                                             Virgulus carolinianus
                                             Virgulus concolor
                                             Virgulus georgianus
                                                   [Virgulus patens var. georgianus]
                                             Virgulus grandiflorus
                                             Virgulus pratensis
                                             Virgulus walteri
                                             Virgulus x amethystinus
                                             Virgulus yukonensis
                                     Vittadinia
                                             Vittadinia remyi
                                     Volutaria
                                             Volutaria muricata
                                     Wamalchitamia
                                     Weberaster
                                             Weberaster modestus
                                     Weberbaueriella
                                     Wedelia
                                             Wedelia acapulcensis
                                               Wedelia acapulcensis var. hispida
                                             Wedelia biflora
                                             Wedelia calycina
                                               Wedelia calycina var. parviflora
                                             Wedelia chihuahuana
                                             Wedelia fruticosa
                                             Wedelia gentryi
                                             Wedelia glauca
                                             Wedelia gracilis
                                             Wedelia greenmanii
                                             Wedelia hispida
                                             Wedelia incarnata
                                               Wedelia incarnata ssp. anodonta
                                               Wedelia incarnata ssp. villosa
                                             Wedelia lanceolata
                                             Wedelia latifolia
                                             Wedelia mexicana
                                             Wedelia parviflora
                                             Wedelia pimana
                                             Wedelia purpurea
                                             Wedelia reticulata
                                             Wedelia rosei
                                             Wedelia scabra
                                             Wedelia serrata
                                                   [Calydermos spilanthoides]
                                             Wedelia strigosa
                                             Wedelia talpana
                                             Wedelia texana
                                             Wedelia trilobata
                                     Werneria
                                             Werneria poposa
                                     Westoniella
                                     Whitneya
                                             Whitneya dealbata
                                     Wilkesia
                                             Wilkesia grayana
                                             Wilkesia gymnoxiphium
                                             Wilkesia hobdyi
                                     Willoughbya
                                             Willoughbya halei
                                     Wollastonia
                                             Wollastonia biflora
                                     Wootonella
                                     Wootonia
                                             Wootonia parviflora
                                     Wulffia
                                     Wyethia
                                             Wyethia amplexicaulis
                                                   [Espeletia amplexicaulis]
                                             Wyethia angustifolia
                                               Wyethia angustifolia var. foliosa
                                               Wyethia angustifolia var. solanensis
                                             Wyethia arizonica
                                             Wyethia bolanderi
                                             Wyethia coriacea
                                             Wyethia elata
                                             Wyethia glabra
                                             Wyethia helenioides
                                             Wyethia helianthoides
                                             Wyethia invenusta
                                             Wyethia longicaulis
                                             Wyethia magna
                                             Wyethia mexicana
                                             Wyethia mollis
                                             Wyethia reticulata
                                             Wyethia x cusickii
                                             Wyethia x magna
                                     Xanthisma
                                             Xanthisma blephariphyllum
                                             Xanthisma coloradoense
                                             Xanthisma gracile
                                               Xanthisma gracile var. gracile
                                             Xanthisma gracilis
                                                   [Dieteria gracilis]
                                                   [Haplopappus gracilis]
                                                   [Haplopappus ravenii]
                                                   [Machaeranthera gracilis]
                                                   [Sideranthus gracilis]
                                             Xanthisma grindelioides
                                                   [Eriocarpum grindelioides]
                                                   [Haplopappus nuttallii]
                                                   [Machaeranthera grindelioides]
                                               Xanthisma grindelioides var. depressum
                                                     [Haplopappus nuttallii var. depressus]
                                                     [Machaeranthera grindelioides var. depressa]
                                               Xanthisma grindelioides var. grindelioides
                                                     [Machaeranthera grindelioides var. grindelioides]
                                                     [Sideranthus grindelioides]
                                               Xanthisma grindelioides var. grindeloides
                                             Xanthisma gypsophilum
                                             Xanthisma junceum
                                             Xanthisma spinulosum
                                                   [Amellus spinulosus]
                                                   [Aster pinnatifidus]
                                                   [Dieteria spinulosa]
                                                   [Diplopappus pinnatifidus]
                                                   [Eriocarpum australe]
                                                   [Eriocarpum spinulosum]
                                                   [Eriocarpum wootonii]
                                                   [Haplopappus coulteri]
                                                   [Haplopappus spinulosus ssp. australis]
                                                   [Haplopappus spinulosus ssp. cotulus]
                                                   [Haplopappus spinulosus ssp. glaberrimus]
                                                   [Haplopappus spinulosus ssp. incisifolius]
                                                   [Haplopappus spinulosus ssp. laevis]
                                                   [Haplopappus spinulosus var. canescens]
                                                   [Haplopappus spinulosus var. glaber]
                                                   [Haplopappus spinulosus var. glaberrimus]
                                                   [Haplopappus spinulosus var. turbinellus]
                                                   [Haplopappus texensis]
                                                   [Machaeranthera australis]
                                                   [Machaeranthera laevis]
                                                   [Machaeranthera pinnata]
                                                   [Machaeranthera pinnatifida ssp. pinnatifida]
                                                   [Machaeranthera pinnatifida var. incisifolia]
                                                   [Machaeranthera pinnatifida var. pinnatifida]
                                                   [Machaeranthera pinnatifida]
                                                   [Machaeranthera texensis]
                                                   [Sideranthus australis]
                                                   [Sideranthus cotula]
                                                   [Sideranthus glaberrimus]
                                                   [Sideranthus laevis]
                                                   [Sideranthus machaerantherus]
                                                   [Sideranthus puberulus]
                                                   [Sideranthus spinulosus var. glaberrimus]
                                                   [Sideranthus spinulosus]
                                                   [Sideranthus turbinellus]
                                                   [Sideranthus wootonii]
                                                   [Starkea pinnata]
                                               Xanthisma spinulosum var. chihuahuanum
                                                     [Haplopappus spinulosus var. chihuahuanus]
                                                     [Machaeranthera pinnatifida var. chihuahuana]
                                               Xanthisma spinulosum var. glaberrimum
                                               Xanthisma spinulosum var. gooddingii
                                                     [Haplopappus gooddingii]
                                                     [Haplopappus spinulosus var. gooddingii]
                                                     [Machaeranthera pinnatifida ssp. gooddingii]
                                                     [Machaeranthera pinnatifida var. gooddingii]
                                                     [Sideranthus gooddingii]
                                               Xanthisma spinulosum var. goodingii
                                               Xanthisma spinulosum var. paradoxum
                                                     [Haplopappus spinulosus var. paradoxa]
                                                     [Machaeranthera pinnatifida var. paradoxa]
                                               Xanthisma spinulosum var. scabrellum
                                               Xanthisma spinulosum var. spinulosum
                                             Xanthisma texanum
                                               Xanthisma texanum ssp. texanum
                                               Xanthisma texanum var. drummondii
                                                     [Xanthisma texanum ssp. drummondii]
                                               Xanthisma texanum var. orientale
                                               Xanthisma texanum var. texanum
                                             Xanthisma viscidum
                                     Xanthium
                                             Xanthium ambrosioides
                                             Xanthium macrocarpum
                                             Xanthium silphifolium
                                             Xanthium spinosum
                                                   [Acanthoxanthium spinosum]
                                                   [Xanthium spinosum var. inerme]
                                             Xanthium strumarium
                                                   [Xanthium acerosum]
                                                   [Xanthium californicum var. rotundifolium]
                                                   [Xanthium californicum]
                                                   [Xanthium campestre]
                                                   [Xanthium canadense]
                                                   [Xanthium cavanillesii]
                                                   [Xanthium cenchroides]
                                                   [Xanthium commune]
                                                   [Xanthium echinatum]
                                                   [Xanthium glanduliferum]
                                                   [Xanthium italicum]
                                                   [Xanthium macounii]
                                                   [Xanthium oligacanthum]
                                                   [Xanthium oviforme]
                                                   [Xanthium pensylvanicum]
                                                   [Xanthium saccharatum]
                                                   [Xanthium speciosum]
                                                   [Xanthium strumarium ssp. italicum]
                                                   [Xanthium strumarium var. canadense]
                                                   [Xanthium strumarium var. oviforme]
                                                   [Xanthium strumarium var. pensylvanicum]
                                                   [Xanthium varians]
                                               Xanthium strumarium var. glabratum
                                                     [Xanthium americanum]
                                                     [Xanthium calvum]
                                                     [Xanthium chasei]
                                                     [Xanthium chinense]
                                                     [Xanthium curvescens]
                                                     [Xanthium cylindraceum]
                                                     [Xanthium echinellum]
                                                     [Xanthium globosum]
                                                     [Xanthium inflexum]
                                                     [Xanthium macrocarpum var. glabratum]
                                                     [Xanthium occidentale]
                                                     [Xanthium orientale]
                                                     [Xanthium strumarium var. wootonii]
                                                     [Xanthium wootonii]
                                               Xanthium strumarium var. strumarium
                                     Xanthocephalum
                                             Xanthocephalum amoenum
                                               Xanthocephalum amoenum var. intermedium
                                             Xanthocephalum benthamianum
                                             Xanthocephalum centauroides
                                             Xanthocephalum durangense
                                             Xanthocephalum eradiatum
                                             Xanthocephalum gymnospermoides
                                                   [Grindelia gymnospermoides]
                                                   [Gutierrezia gymnospermoides]
                                               Xanthocephalum gymnospermoides var. eradiatum
                                               Xanthocephalum gymnospermoides var. intermedium
                                             Xanthocephalum megalocephalum
                                             Xanthocephalum petradoria
                                             Xanthocephalum texanum
                                     Xeranthemum
                                             Xeranthemum annuum
                                             Xeranthemum squarrosum
                                     Xerochrysum
                                             Xerochrysum bracteatum
                                     Ximenesia
                                     Xiphochaeta
                                     Xylorhiza
                                             Xylorhiza brandegei
                                             Xylorhiza cognata
                                             Xylorhiza coloradoensis
                                             Xylorhiza confertifolia
                                             Xylorhiza cronquistii
                                             Xylorhiza frutescens
                                             Xylorhiza glabriuscula
                                               Xylorhiza glabriuscula var. glabriuscula
                                               Xylorhiza glabriuscula var. linearifolia
                                               Xylorhiza glabriuscula var. villosa
                                             Xylorhiza linearifolia
                                             Xylorhiza orcuttii
                                                   [Aster orcuttii]
                                                   [Machaeranthera orcuttii]
                                             Xylorhiza standleyi
                                             Xylorhiza tortifolia
                                                   [Machaeranthera tortifolia]
                                               Xylorhiza tortifolia var. imberbis
                                                     [Machaeranthera tortifolia var. imberbis]
                                               Xylorhiza tortifolia var. tortifolia
                                                     [Aplopappus tortifolius]
                                                     [Aster abatus]
                                                     [Aster goodingii]
                                                     [Aster mohavensis]
                                                     [Aster tortifolius]
                                                     [Xylorhiza lanceolata]
                                                     [Xylorhiza scopulorum]
                                             Xylorhiza venusta
                                                   [Aster venustus]
                                                   [Machaeranthera venusta]
                                             Xylorhiza villosa
                                             Xylorhiza wrightii
                                                   [Aster wrightii]
                                                   [Machaeranthera wrightii]
                                                   [Townsendia wrightii]
                                     Xylothamia
                                             Xylothamia diffusa
                                                   [Ericameria diffusa]
                                                   [Haplopappus sonoriensis]
                                             Xylothamia palmeri
                                               Xylothamia palmeri var. pachylepis
                                             Xylothamia pseudobaccharis
                                             Xylothamia triantha
                                                   [Ericameria triantha]
                                                   [Haplopappus trianthus]
                                     Yermo
                                             Yermo xanthocephalus
                                     Youngia
                                             Youngia japonica
                                                   [Crepis japonica]
                                                   [Youngia japonica ssp. elstonii]
                                                   [Youngia thunbergiana]
                                     Zacintha
                                     Zaluzania
                                             Zaluzania augusta
                                             Zaluzania discoidea
                                             Zaluzania globosa
                                             Zaluzania grayana
                                                   [Viguiera triloba]
                                             Zaluzania megacephala
                                             Zaluzania montagnifolia
                                             Zaluzania parthenioides
                                             Zaluzania subcordata
                                             Zaluzania triloba
                                     Zexmenia
                                             Zexmenia crocea
                                             Zexmenia ghiesbrechtii
                                             Zexmenia gradata
                                             Zexmenia hispida
                                             Zexmenia lantanifolia
                                             Zexmenia pringlei
                                             Zexmenia seemannii
                                             Zexmenia serrata
                                     Zinnia
                                             Zinnia acerosa
                                                   [Zinnia pumila]
                                             Zinnia americana
                                             Zinnia angustifolia
                                               Zinnia angustifolia var. angustifolia
                                             Zinnia anomala
                                             Zinnia bicolor
                                             Zinnia flavicoma
                                             Zinnia grandiflora
                                                   [Crassina grandiflora]
                                             Zinnia greggii
                                             Zinnia haageana
                                             Zinnia juniperifolia
                                             Zinnia leucoglossa
                                             Zinnia linearis
                                             Zinnia maritima
                                               Zinnia maritima var. palmeri
                                             Zinnia palmeri
                                             Zinnia peruviana
                                                   [Crassina multiflora]
                                                   [Zinnia multiflora]
                                                   [Zinnia pauciflora]
                                             Zinnia purpusii
                                             Zinnia tenella
                                             Zinnia tenuis
                                             Zinnia violacea
                                                   [Crassina elegans]
                                                   [Zinnia elegans]
                                             Zinnia zinnioides
                                     Zollikoferia
                                     Zyzyxia
                                     x Argyrautia
                                             x Argyrautia degeneri
                                     x Solidaster
                                             x Solidaster luteus

Problematic Rooting (14444)
                                               Achillea lanulosa subsp. lanulosa

Problematic Rooting (151465)
                                               Actinella richardsonii var. canescens

Problematic Rooting (15287)
                                               Haplopappus armerioides var. armerioides

Problematic Rooting (15292)
                                               Haplopappus nuttallii var. nuttallii

Problematic Rooting (15909)
                                               Riddellia tagetina var. pumila

Problematic Rooting (16194)
                                               Viguiera multiflora var. multiflora

Problematic Rooting (16215)
                                               Xanthium commune var. wootoni

Problematic Rooting (31726)
                                               Chrysothamnus nauseosus var. linearifolius
                                               Chrysothamnus nauseosus var. macrophyllus

Problematic Rooting (31740)
                                               Senecio douglasii var. normalis
                                               Senecio douglasii var. sublanceolatus

Problematic Rooting (44008)
                                               Hemizonia fasciculata ssp. ramosissima

Problematic Rooting (44009)
                                               Hemizonia paniculata ssp. cruzensis
                                               Hemizonia paniculata ssp. foliosa
                                               Hemizonia paniculata ssp. increscens

Problematic Rooting (62598)
                                               Aster occidentalis var. scabriusculus

Problematic Rooting (62976)
                                               Brachyactis ciliata var. carnosula

Problematic Rooting (64957)
                                               Haplopappus arborescens ssp. peninsularis

Problematic Rooting (64986)
                                               Haplopappus venetus ssp. tridentatus

Problematic Rooting (68357)
                                               Senecio streptanthifolius var. streptanthifolius

Problematic Rooting (6987)
                                               Artemisia dracunculoides var. wolfii

Problematic Rooting (7351)
                                               Townsendia sericea var. papposa

Problematic Rooting (9126)
                                               Aster adscendens var. parryi

Problematic Rooting (9246)
                                               Bidens odorata var. odorata