Annuals or biennials, 15-70(-120+) cm. Stems mostly erect. Leaves all or mostly alternate (proximalmost sometimes opposite); blades simple or 1-2-ternately lobed, lobes ovate or obovate to lanceolate or oblanceolate, 2-25 × 1-6(-8) mm, faces sparsely scabrellous, usually gland-dotted as well. Involucres 4-6+ × 8-12+ mm. Ray florets 10-15; corolla laminae 5-6(-10+) mm. Disc florets 40-80+; corollas 3-3.5 mm. Cypselae 2.5-3.5+ mm, faces ± hirtellous; pappi of ± spatulate to oblanceolate, apically ± muticous scales 1-1.5 mm. 2n = 24. Flowering (May-)Jul-Aug(-Nov). Sandy soils, limestone, openings in grasslands and pinyon-juniper woodlands; 900-2000 m; N.Mex., Tex.; Mexico (Chihuahua, Coahuila).