川东蔷薇 chuan dong qiang wei

Shrubs deciduous. Branchlets purple-brown, terete, slender, glabrous; prickles scattered, straight, short. Leaves 7–10 cm including petiole; stipules mostly adnate to petiole, free parts ovate or lanceolate, ca. 3 mm, glabrous, abaxially and at margin glandular-pubescent; rachis and petiole densely glandular-pubescent; leaflets (5 or)7–11, pale green abaxially, deep green adaxially, elliptic or oblong-elliptic, 1.5–4 × 1–2.5 cm, abaxially brown hirsute, densely so along veins, adaxially subglabrous, base cuneate to broadly so, margin acutely doubly serrate; teeth glandular apically when young. Flowers 1–3, 1.5–2 cm in diam.; peduncle ca. 2 cm, slightly glandular-pubescent or subglabrous; pedicel 3–4 cm, glandular hairy; bracts ovate-lanceolate, ca. 2 mm, abaxially and at margin glandular-pubescent, apex acute or acuminate. Hypanthium campanulate, abaxially glandular-pubescent. Sepals lanceolate, ca. 1 cm, margin glandular-pubescent, sometimes pinnately lobed, apex long acuminate or caudate-acuminate. Petals white, broadly obovate, 1.2–1.5 × 1–1.3 cm, base broadly cuneate, apex emarginate or 2-lobed. Styles free, slightly exserted, shorter than stamens, pubescent. Hip unknown. Fl. Jun–Aug.

Chongqing (Chengkou Xian).

One of us (Robertson) has seen no specimens of this species.