Shrubs scandent, to 3 m tall. Branchlets grayish brown, terete, soft hairy, glabrescent, with sparse, curved prickles. Leaves simple; petiole 3–7 cm, densely villous, with sparse, curved minute prickles; stipules free, 1–1.4 cm, pilose, pinnately or palmately lobed; lobes lanceolate or linear; blade ovate to narrowly ovate, 8–14 × 5–12 cm, lateral veins 4 or 5 pairs, abaxially densely gray to yellowish gray tomentose and villous along veins, adaxially glabrous except villous along veins, base cordate, margin distinctly lobed, terminal lobe triangular-lanceolate, much larger and longer than lateral triangular ones, irregularly abruptly sharply serrate, apex acuminate. Inflorescences terminal or axillary, terminal ones narrow cymose panicles or subracemes, axillary ones subcorymbose or flowers several in a cluster; rachis and pedicels yellowish villous; bracts 0.8–1.2 cm, villous, pinnately or palmately lobed; lobes linear or lanceolate. Pedicel 1–1.5 cm. Flowers 6–8 mm in diam. Calyx abaxially densely yellowish villous and intermixed tomentose; sepals ovate, 6–8 × 3–5 mm, apex acute, outer sepals palmately or pinnately laciniate; lobes linear, erect in fruit. Petals white, suborbicular or obovate, slightly longer than or nearly as long as sepals. Stamens numerous, in 2 whorls; filaments linear, glabrous. Pistils many, much longer than stamens; ovary glabrous. Aggregate fruit red, subglobose, 7–9 mm in diam., glabrous, enclosed in calyx; pyrenes rugose. Fl. May–Jul, fr. Aug–Sep.
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