Rosa langyashanica D. C. Zhang & J. Z. Shao

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

Shrubs deciduous, ca. 2 m tall. Branchlets dark purple or grayish brown, terete, glabrous, sparsely prickly; prickles yellowish, curved or straight, flat, turgid at base. Leaves 7–10 cm including petiole; stipules mostly adnate to petiole, free parts pectinately parted to base, margin glandular-pubescent or not; rachis and petiole glandular-pubescent or subglabrous; leaflets (5 or)7 or 9, sessile or subsessile, pale green abaxially, deep green adaxially, rhomboid-elliptic, 2.5–3 × 0.8–1.8 cm, midvein and lateral veins prominent abaxially, impressed adaxially, both surfaces glabrous, base cuneate or broadly so, margin sharply deeply serrate, apex acute or acuminate; teeth triangular-ovate. Compound corymb 5–9-flowered; peduncle sparsely glandular-pubescent. Flowers 2–3 cm in diam.; pedicel 2–2.5 cm; bracts unknown. Hypanthium obovoid, abaxially glabrous. Sepals lanceolate or ovate-lanceolate, ca. 2 × as long as hypanthium, abaxially subglabrous, adaxially densely pubescent, margin entire, usually glandular-pubescent, apex caudate-acuminate. Petals pink, broadly obovate, 6–7 × 4–5 mm, base cuneate, apex emarginate. Stamens numerous. Styles connate into a column, exserted, slightly longer than stamens, glabrous. Hip ovoid-globose, glabrous when young. Fl. May.

E Anhui (Chu Xian).

Forest margins; 100--200 m.

Rosa langyashanica là loài thực vật có hoa trong họ Hoa hồng. Loài này được D.C. Zhang & J.Z. Shao miêu tả khoa học đầu tiên năm 1997.