Shrubs scandent, 1–2 m tall. Branchlets brownish, terete, densely villous, bristly, unevenly glandular hairy, with sparse, small basally broad prickles. Leaves simple; petiole 4–8 cm, with reddish purple glandular hairs, bristly, villous; stipules caducous, free, brown, 1–1.5 cm, villous, with glandular hairs, palmatipartite; lobes lanceolate or linear-lanceolate; blade suborbicular, 10–20 cm in diam. and ca. as long, palmately 5-veined, lateral veins 4 or 5 pairs, both surfaces soft hairy, with reddish brown glandular hairs and bristles along veins, base cordate, margin 3–5-lobed; lobes triangular, terminal lobe slightly larger than lateral lobes, irregularly sharply serrate, apex acute to shortly acuminate. Inflorescences terminal or axillary, terminal ones cymose panicles, large, to 20 cm, axillary ones narrow panicles or subracemes, shorter; rachis, pedicels, and abaxial surface of calyx with dense reddish brown glandular hairs, bristles and long hairs; bracts 1–1.4 cm, villous, with glandular hairs, palmatipartite; lobes lanceolate or linear-lanceolate. Pedicel 0.8–1.5 cm. Flowers 1–1.5 cm in diam. Sepals erect in fruit, narrowly lanceolate, 1–1.5 cm, margin slightly tomentose, apex caudate, outer sepals often shallowly laciniate; lobes linear. Petals white, broadly obovate, shorter than sepals, base clawed. Stamens many; filaments linear; anthers villous. Ovary glabrous; styles longer than stamens. Aggregate fruit subglobose, red, ca. 1 cm in diam., glabrous, enclosed in calyx; pyrenes slightly rugose. Fl. Jun–Jul, fr. Aug–Sep.