Hall’s woolly sunflower

Perennials (± taprooted). Proximal leaves opposite; blades ovate, 1-pinnately lobed, ultimate margins slightly revolute, abaxial faces sparsely woolly, adaxial glabrate. Heads 2–4 per array or borne singly. Peduncles mostly 5–12 cm. Involucres 7–8 mm diam. Ray florets 8–9; laminae 10–13 mm (disc corolla tubes glabrous). Cypselae 3.5–5 mm; pappi 0.7–2 mm. 2n = 16.

Flowering Jun–Jul. Dry sites, woodlands; of conservation concern; 1200–1500 m; Calif.

Variety hallii is known only from two populations in Kern and in Santa Barbara counties and is threatened by cattle (D. P. Tibor 2001).