Shrubs climbing, ca. 10 m tall. Branchlets purple-brown, curved, robust, angulate, glabrous; prickles scattered, hooked, short, stout, flat. Leaves including petiole 17–25 cm; stipules mostly adnate to petiole, free parts ovate-lanceolate, margin pubescent and glandular-pubescent, glabrate; rachis and petiole glabrous; leaflets usually 5, rarely 7, often 3 on leaves near corymb, elliptic, rarely ovate-oblong, 7–12 × 3–6 cm, leathery, glabrous, abaxially midvein and lateral veins prominent, adaxially midvein concave, base rounded, margin acutely serrate, apex acuminate or shortly caudate. Flowers numerous, in compound corymbs, 3–4 cm in diam.; pedicel 2.5–4 cm; densely puberulous; bracts unknown. Hypanthium subglobose, abaxially densely pubescent. Sepals 5, reflexed, deciduous, lanceolate, 1.5–2 cm, both surfaces densely whitish tomentose, margin entire, apex acuminate. Petals 5, white, obovate, abaxially sparsely pubescent, base cuneate, apex erose. Styles connate into column, exserted, slightly longer than stamens, densely white pubescent. Hip purple-brown, subglobose or ovoid, 1.8–2.3 cm in diam., sparsely pubescent; sepals deciduous at hip ripening. Fl. May–Jul, fr. Jul–Nov.
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