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Erigeron tweedyi
Erigeron tweedyi
Canby
Family:
Asteraceae
Images
not available
Flora of North America
Resources
Guy L. Nesom in Flora of North America (vol. 20)
Perennials,
4-20 cm; taprooted, caudices multicipital crowns or branches relatively short and thick.
Stems
erect to ascending or decumbent-prostrate, densely strigose (hairs relatively thin), eglandular.
Leaves
basal (persistent) and cauline; basal (silvery) blades spatulate, broadly elliptic, 50-250 × 5-13 mm, cauline abruptly reduced distally, margins entire, faces densely strigoso-sericeous (hairs gray-white), eglandular.
Heads
1-4.
Involucres
4-6 × 9-14 mm.
Phyllaries
in 3-4 series, finely hirsuto-strigose, sparsely minutely glandular.
Ray florets
20-50; corollas blue to purple, sometimes white, 5-9 mm, laminae not coiling or reflexing.
Disc corollas
3.1-4.3 mm.
Cypselae
2-2.5 mm, 2-nerved, faces strigoso-sericeous;
pappi:
outer of setae, inner of 20-30 bristles. Flowering Jun-Aug. Clay hills, rocky slopes, limestone taluses, shale outcrops, sagebrush-grasslands; (1300-)1600-3000 m; Idaho, Mont., Wyo.
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