San Clemente Island bristleweed

Diplostephium canum A. Gray, Proc. Amer. Acad. Arts 11: 75. 1876; Haplopappus canus (A. Gray) S. F. Blake

Shrubs, 60–250 cm. Stems lanate-tomentose. Leaves subsessile or subpetiolate; blades oblanceolate, 4–12 × 1–4 cm, thin, bases not clasping, margins serrulate to subentire, abaxial faces densely short-tomentose, adaxial glabrate or glabrescent. Heads in thyrsiform arrays. Involucres broadly turbinate, 7–10 × 5–8 mm. Phyllaries erect, oblong, apices acute, faces of outer loosely woolly-tufted apically. Ray florets 6–14, fertile; corollas shorter than involucre, inconspicuous. Disc florets 15–25; corollas 5–8 mm. Cypselae 3–4 mm, canescent. 2n = 10.

Flowering Jun–Sep. Rocky canyon walls; 200–500 m; Calif.; Mexico (Baja California).

Hazardia cana is known from San Clemente Island.