Hymenatherum hartwegii A. Gray, Smithsonian Contr. Knowl. 3(5): 117. 1852; Dyssodia hartwegii (A. Gray) B. L. Robinson; D. pentachaeta (de Candolle) B. L. Robinson var. hartwegii (A. Gray) Strother

Leaves 12–34 mm overall, lobes 3–7, unequal (terminal lobes usually notably longer than laterals). Peduncles 2–5 cm. Calyculi of 3–5 bractlets. Involucres cylindric, 3–5 × 2–3.5 mm. Phyllaries ca. 13, margins of outer distinct ¹/3 or less their lengths, abaxial faces sparsely puberulous, often glabrescent. Disc florets 16–40. Pappi of 5 erose scales alternating with 5, 1–3-aristate scales.

Flowering early spring and late summer, following rains. Calcareous outcrops and bluffs, deserts; 1500–2500 m; Ariz., N.Mex., Tex.; Mexico.