Smithsonian Contr. Knowl. 5(6): 97. 1853.
Annuals or perennials, 3–6 dm. Phyllaries (8–)12–16, mostly oblong to ovate or obovate. Rays 0. Disc florets 15–30; corollas white or pinkish to purplish, 5–6 mm, lobe lengths 2–3+ times throats; anthers pinkish to purplish. Cypselae 4–5 mm; pappus scales 4–6 mm. 2n = 24.
Phenology: Flowering mostly late summer–fall.
Habitat: Rocky places, often with pinyons and junipers
Elevation: 900–2300 m
Ariz., Calif., N.Mex., Tex., Mexico (Baja California, Chihuahua, Sonora).