Rosa chengkouensis T. T. Yu & T. C. Ku

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

Shrubs 1.5–2 m tall. Branchlets terete, slender; prickles scattered or in pairs below leaves, straight. Leaves including petiole 5–8 cm; stipules mostly adnate to petiole, free parts ovate or ovate-lanceolate, abaxially and margin densely glandular-pubescent, apex acute; rachis and petiole pubescent, glandular-pubescent, shortly prickly; leaflets usually 5, rarely 7 or 3, elliptic, oblong, or ovate, 1.5–3.5 × 1–1.8 cm, abaxially sparsely pubescent and glandular punctate, distinctly reticulate, adaxially glabrous, base broadly cuneate or subrounded, margin doubly serrate, teeth often glandular apically, apex acute or rounded-obtuse. Flowers solitary or several, 2.5–3 cm in diam.; pedicel 1.5–3 cm, glandular-pubescent; bracts ovate-lanceolate, margin glandular-pubescent, apex long acuminate. Sepals 5, oblong-lanceolate, leaflike, both surfaces densely pubescent, margin entire, glandular-pubescent. Petals 5, pink, broadly obovate, base cuneate, apex rounded. Styles free, slightly exserted, much shorter than stamens, densely pubescent. Hip dark red, ovoid or obovoid, 7–8 mm in diam., sparsely glandular-pubescent, with persistent, erect sepals. Fl. May–Jun, fr. Aug–Oct.

Chongqing (Chengkou Xian, Wuxi Xian).

Scrub, river sides; 1300--2100 m.

Rosa chengkouensis là loài thực vật có hoa trong họ Hoa hồng. Loài này được T.T. Yu & T.C. Ku miêu tả khoa học đầu tiên năm 1981.

城口蔷薇（学名：Rosa chengkouensis），为蔷薇科蔷薇属下的一个种。