Rosa mairei H. Lév.

Shrubs small, 0.5–2 m tall. Branchlets terete, robust; prickles in pairs below leaves, straight, to 1 cm, fine to stout or winglike on same plant, gradually tapering to thickened base, winged prickles to 2 cm in diam.; bristles scattered to dense on older stems. Leaves including petiole 2–7 cm; stipules mostly adnate to petiole, free parts ovate, pubescent, margin serrate or entire; rachis and petiole sericeous; leaflets 5–9(–11), oblong-ovate or obovate, sometimes oblong, 6–20 × 4–10 mm, both surfaces sericeous, base cuneate or subrounded, margin serrate at upper 1/3–2/3 part, apex rounded-obtuse or truncate. Flower solitary, axillary, 2–3 cm in diam.; pedicel 8–15 mm, pubescent. Hypanthium ovoid, glabrous. Sepals 4, ovate or lanceolate, abaxially sparsely pubescent, adaxially densely pubescent, margin entire, apex acuminate. Petals 4, white, broadly obovate, base cuneate, apex undulate. Styles free, much shorter than stamens, slightly exserted, pubescent. Hip red or brown, ovoid-globose, ca. 1 cm in diam., glabrous, with persistent, erect or reflexed sepals; pedicel 8–15 mm, pubescent. Fl. May–Jul, fr. Jul–Oct.

Guizhou, Sichuan, Xizang, Yunnan.

Stream sides in forests, sunny slopes; 2300--4200 m.