Hazardia stenolepis

(H. M. Hall) Hoover

Vasc. Pl. San Luis Obispo Co., 296. 1970.

Common names: Serpentine bristleweed
Basionym: Haplopappus squarrosus subsp. stenolepis H. M. Hall Publ. Carnegie Inst. Wash. 389: 253, fig. 89. 1928
Treatment appears in FNA Volume 20. Treatment on page 448. Mentioned on page 446.

Shrubs, 30–100 cm. Stems sparsely short-hispidulous. Leaves sessile; blades obovate to oblong, 15–25 × 5–12 mm, coriaceous, bases subclasping, margins coarsely spinulose-dentate or -serrate (with 5–11 pairs of teeth), faces glabrous. Heads in densely spiciform arrays. Involucres cuneate to very narrowly turbinate, 10–17 × 3–6 mm. Phyllaries stiffly erect, almost completely stramineous, linear-lanceolate, faces glabrous except minutely gland-dotted at tips. Ray florets 0. Disc florets 4–8(–10); corollas 7–9 mm. Cypselae 5–8 mm, glabrous. 2n = 10.

Phenology: Flowering Sep–Nov.
Habitat: Oak-pine woods
Elevation: 150–2000 m



Calif., Mexico (Baja California).


Hazardia stenolepis is distinguished by its hairy stems, glabrous, relatively small leaves, discoid heads, and long, narrow involucres with stramineous, linear-lanceolate phyllaries.

Selected References


Lower Taxa