刺梗蔷薇 ci geng qiang wei

Rosa hemsleyana Tackholm; R. macrophylla Lindley var. crasseaculeata Vilmorin.

Shrubs to 3 m tall. Branchlets terete, slightly curved, glabrous; prickles sparse to absent, straight or slightly curved, to 1 cm, stout, flat, evenly tapering to a broader base. Leaves including petiole 8–19 cm; stipules broad, mostly adnate to petiole, free parts auriculate, triangular-lanceolate, abaxially and at margin glandular, apex acuminate; rachis and petiole densely glandular-pubescent and sparsely shortly prickly; leaflets 5–9, ovate, elliptic, or broadly elliptic, 2.5–5.2 × 1.2–3 cm, abaxially pubescent and glandular, with prominent midvein and lateral veins, adaxially glabrous, base subrounded or broadly cuneate, margin doubly serrate, teeth often glandular apically, apex acute or rounded-obtuse. Flowers in lax corymb, 3.5–5 cm in diam.; pedicel 1.3–2.4 cm, glandular; bracts 2 or 3, ovate, abaxially reticulate, pubescent and glandular, margin irregularly serrate and glandular, apex acuminate. Hypanthium oblong or ovoid, densely stipitate glandular, glands to 2 mm. Sepals 5, ovate, leaflike, abaxially glandular, margin pinnately lobed or serrate, adaxially tomentose, teeth glandular apically, apex long caudate. Petals 5, pink or rose-purple, broadly obovate, abaxially slightly pubescent, base cuneate, apex emarginate. Styles free, slightly exserted, much shorter than stamens, pubescent. Hip deep red, oblong-ovoid, 1–2 cm in diam., with a neck at apex, glandular-pubescent or not, with persistent, erect sepals. Fl. May–Jul, fr. Jul–Oct.

Scrub, slopes; 1800--2600 m. Hubei, Sichuan.