Late snakeweed

Gutierrezia polyantha A. Nelson

Subshrubs, 15–30 cm. Stems glabrous. Leaves: basal absent at flowering; cauline blades 1-nerved, linear to filiform, 0.5–1 mm wide, reduced distally. Heads borne singly or (sessile in glomerate clusters of 3–5) in loose arrays. Involucres narrowly campanulate (lengths ± equaling diams.), 3–4 mm diam. Phyllary apices flat. Ray florets 4–9; corollas yellow, 2.3–4(–5.4) mm. Disc florets (8–)10–12(–17). Cypselae 1–1.2 mm, faces densely strigoso-sericeous (hairs ± twisted, apically attenuate); pappi of 1–2 series of oblanceolate scales 0.5–1 mm. 2n = 8.

Flowering Apr–May and/or Aug–Oct. Grasslands, Larrea flats; 400–1200 m; Ariz.