Gasquet rose

Stems (1–)3–6(–13) dm. Leaves 2–6(–8) × 1.5–3(–4) cm; stipules 5–11 mm; leaflets 5(–7), often bluish green or red-tinged, ± leathery, terminal: petiolule 2–10 mm, blade broadly elliptic to obovate or ovate to nearly orbiculate, 4–20 × 4–20 mm, apex usually broadly obtuse to rounded, sometimes nearly truncate. Pedicels 10–15 mm, eglandular or stipitate-glandular (in same inflorescence). Flowers 2 cm diam.; petals 8–10 × 6–10 mm. Hips irregularly ovoid to elongate-ellipsoid. Achenes 1–4.

Flowering Apr–Jun. Full sun in roadsides, ridges, and other openings in chaparral and stunted forests on ultramafic substrates; of conservation concern; 400–1500(–2300) m; Calif., Oreg.

Variety serpentina is the form that usually occurs in full sun on ultramafic substrates in the Siskiyou Mountains of northwestern California and southwestern Oregon.