Psathyrotes scaposa A. Gray, Smith-sonian Contr. Knowl. 5(6): 100, plate 13. 1853; Pseudobartlettia scaposa (A. Gray) Rydberg

Leaf blades 1–6 × 1–4 cm. Peduncles (3–)5–20 mm, stipitate-glandular (at least distally). Disc corollas ca. 5 mm. Cypselae 2.5–3.5 mm; pappus bristles 1–3 mm. 2n = 38.

Flowering mostly spring and fall (following rains). Gypseous and calcareous soils in creosote bush scrub-lands; 700–1300 m; N.Mex., Tex.; Mexico (Chihuahua).