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FOC | Family List | FOC Vol. 9 | Rosaceae | Rosa

53. Rosa webbiana Wallich ex Royle, Ill. Bot. Himal. Mts. 1: 208. 1835.

藏边蔷薇 zang bian qiang wei

Shrubs 1–2 m tall. Branchlets purple-brown, slender; prickles in pairs below leaves, and scattered, yellow, terete, straight, to 1 cm, stout, gradually tapering below to a broad base. Leaves including petiole 3–4 cm; stipules mostly adnate to petiole, free parts ovate, margin glandular, apex acute; rachis and petiole glabrous but very sparsely small prickly; leaflets 5–9, suborbicular, obovate, or broadly elliptic, 6–20 × 4–12 mm, glabrous or abaxially sparsely puberulous along veins, base subrounded or cuneate, margin simply serrate at upper part, near base entire, apex rounded-obtuse, rarely acute. Flowers solitary, rarely 2 or 3 and fasciculate, 3.5–5 cm in diam.; pedicel 1–1.5 cm, glabrous or glandular-pubescent; bracts ovate, margin glandular serrate, midvein and lateral veins abaxially conspicuous. Hypanthium subglobose or ovoid, glabrous or glandular puberulous. Sepals 5, triangular-lanceolate, abaxially glandular-pubescent, adaxially densely puberulous, margin entire, apex elongate. Petals 5, reddish or rose, broadly obovate, base cuneate, apex emarginate. Styles free, shorter than stamens, pubescent. Hip nodding, bright-red, subglobose or ovoid, 1.5–2 cm in diam., glabrous, with persistent, spreading sepals. Fl. Jun–Jul, fr. Jul–Sep.

Forests, scrub, grassy places, valleys, slopes, farmland; 2000--4500 m. Xizang [Afghanistan, N India, Kashmir, Mongolia, W Nepal].

Rosa dawoensis Pax & Hoffmann (Repert. Spec. Nov. Regni Veg. Beih. 12: 414. 1922), described from Sichuan (Dawu Xian), is similar to R. webbiana and requires further study.


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