6. Rosa platyacantha Schrenk, Bull. Sci. Acad. Imp. Sci. Saint-Pétersbourg. 10: 252. 1842.
宽叶蔷薇 kuan ci qiang wei
Shrubs small, 1–2 m tall. Branchlets spreading, robust, glabrous; prickles abundant, yellow, straight or curved, to 8 mm, firm, flat, widening to a broad elliptic base. Leaves including petiole 3–5 cm; stipules mostly adnate to petiole, free parts lanceolate, glandular serrate; rachis and petiole glandular when young; leaflets 5–7(–9), suborbicular, obovate, or oblong, 8–15 × 5–10 mm, leathery, glabrous or abaxially along veins sparsely pubescent, base broadly cuneate or subrounded, margin 4–6-serrate at upper part, entire below, apex rounded-obtuse. Flower solitary, or 2 or 3 and fasciculate, axillary, 3–5 cm in diam.; pedicel 1–3.5 cm, usually glabrous; bracts absent. Hypanthium globose or ovoid, abaxially glabrous. Sepals 5, lanceolate, ca. 2 × as long as hypanthium, adaxially pubescent, margin entire, apex acuminate. Petals 5, yellow, obovate, base cuneate, apex emarginate. Styles free, shorter than stamens, slightly exserted, yellowish white villous. Hip dark red or purple-brown, globose or ovoid, ca. 1 cm in diam. shiny, with persistent, erect sepals; pedicel 1–3.5 cm, usually glabrous. Fl. May–Aug, fr. Aug–Nov. 2n = 14*.
Forests, forest margins, scrub, stream sides, arid slopes, waste fields; 1100--1800 m. Xinjiang [Kazakhstan, Mongolia].