Description from Flora of China
Shrubs scandent or creeping. Branchlets brown or reddish brown, densely gray tomentose when young, glabrescent, with sparse, curved minute prickles. Leaves simple; petiole 3–6 cm, densely gray tomentose when young, glabrescent, with sparse, curved minute prickles; stipules caducous, free, brown, 7–12 mm, yellow tomentose-villous, apex palmately lobed, lobes lanceolate; blade ovate or narrowly ovate, 7–15 × 5–9 cm, palmately 5-veined, lateral veins 4 or 5 pairs, raised abaxially, papery, abaxially densely rusty yellow tomentose, adaxially glabrous, base deeply cordate, margin often undivided or slightly undulate, unevenly obtusely serrate, apex acute to shortly acuminate. Inflorescences short racemes, 2.5–5 cm, few flowered, or flowers several in clusters; rachis and pedicels densely yellow tomentose-villous; bracts brown, 6–11 mm, tomentose-villous, palmately divided apically; lobes lanceolate. Pedicel 1–2 cm. Flowers 1–1.2 cm in diam. Calyx abaxially densely yellow tomentose-villous; tube cupular; sepals reflexed after anthesis, ovate-lanceolate, 5–8 × 3–5 mm, apex shortly acuminate to acuminate; outer sepals broader than inner sepals, margin 2- or 3-lobed, inner sepals with entire margin. Petals white, suborbicular, much shorter than sepals, basally puberulous. Stamens many, glabrous or slightly pilose; filaments somewhat longer than petals, apex subulate; anthers glabrous. Pistils slightly longer than stamens; styles and ovaries often glabrous. Aggregate fruit black at maturity, semiglobose, 1–1.3 cm in diam., glabrous; pyrenes smooth or slightly rugose. Fl. May–Jun, fr. Jul–Aug.
Waste places on hills, rock cliffs, slopes, valleys; 900--1500 m. Fujian, Guizhou, Hubei, Hunan, Shaanxi, Sichuan, Taiwan (Lan Yu).