25. Rosa corymbulosa Rolfe, Bot. Mag. 140: t. 8566. 1914.
伞房蔷薇 san fang qiang wei
Shrubs small, 1.3–2 m tall. Branchlets terete, straight or slightly curved, glabrous; prickles absent or sparse, straight, short, to 5 mm, stout, gradually tapering to base. Leaves including petiole 5–13 cm; stipules mostly adnate to petiole, flat, free parts ovate, margin glandular-pubescent, apex acuminate; rachis and petiole sparsely puberulous, glandular-pubescent, often with tiny prickles; leaflets 3–5, rarely 7, ovate-oblong or elliptic, 2.5–6 × 1.5–3.5 cm, abaxially pubescent and paler, adaxially glabrous, base cuneate or subrounded, margin doubly or simply serrate, apex acute or rounded-obtuse. Flowers numerous or several, in umbel-like corymb, rarely solitary, 2–2.5 cm in diam.; pedicel 2–4 cm, pubescent and glandular-pubescent; bracts ovate or ovate-lanceolate, margin glandular-pubescent, apex long acuminate. Hypanthium subglobose or ovoid, pubescent, glandular. Sepals 5, ovate-lanceolate, leaflike, both surfaces pubescent, margin entire or inconspicuously serrate, glandular-pubescent, apex expanding. Petals 5, red, white at base, broadly obcordate, apex emarginate. Styles free, exserted, slightly shorter than or equaling stamens, densely yellowish white villous. Hip bright-red, globose or ovoid, ca. 8 mm in diam., with persistent, erect sepals. Fl. Jun–Jul, fr. Aug–Oct.
Forests, thickets, scrub, slopes, river sides; 1600--2000 m. Gansu, Hubei, Shaanxi, Sichuan.