Annuals, 10–30+ cm. Stems mostly erect. Leaves all or mostly opposite (distal sometimes alternate); blades simple or 1–2-ternately lobed, lobes filiform to linear, 10–25(–50+) × 0.5–1(–2+) mm, faces sparsely scabrellous, usually gland-dotted as well. Involucres 3–4+ × 7–9+ mm. Ray florets 5–9(–13+); corolla laminae 4–5+ mm. Disc florets 25–50+; corollas 1.5–3 mm. Cypselae 2–3.5+ mm, faces ± hirtellous; pappi of ± ovate to quadrate, apically ± muticous scales 0.5–1 mm. 2n = 22.

Flowering Jun–Oct. Sandy soils; 1500–1900 m; Tex.