Desert yellow-head

Taproots penetrating to 20–25+ cm. Stems hollow. Leaf blades 4–25 × 1–6 cm. Peduncles 3–15 mm. Involucres 8–15 mm. Disc florets slightly exserted from involucres; corollas: tubes 3.5 mm, throats 2.5 mm, lobes 2–3(–3.5) mm. Cypselae 6–7 mm; pappi 5 mm.

Flowering Jun(–Aug). Barren, white silty-clay; of conservation concern; 2000 m; Wyo.

Yermo xanthocephalus is known only from one site in central Wyoming. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.