Shrubs erect or scandent, to 2 m tall. Branchlets grayish brown or reddish brown, densely yellowish tomentose-villous, with sparse, curved minute prickles. Leaves simple; petiole 2–4 cm, densely yellowish tomentose-villous, with sparse, curved minute prickles; stipules free, broadly obovate, 0.8–1.4 × 0.8–1.4 cm, villous, palmately lobed, lobes lanceolate; blade broadly triangular-ovate, 7–14 × 4.5–11 cm, lateral veins 4 or 5 pairs, abaxially densely gray or yellowish tomentose and intermixed villous along veins, adaxially villous along veins, base truncate, margin undivided, rarely shallowly undulate, irregularly serrate, apex acuminate. Inflorescences terminal or axillary, narrow panicles or subracemes, axillary ones subcorymbose or flowers few in clusters; rachis and pedicels yellowish tomentose-villous; bracts broadly obovate, 7–13 × 6–12 mm, villous, palmately lobed; lobes lanceolate. Pedicel ca. 1 cm. Flowers ca. 1 cm in diam. Calyx abaxially densely yellowish villous, intermixed tomentose; sepals ovate, 5–7 × 3–5 mm, apex acute, outer sepals often divided apically; lobes linear or lanceolate, inner sepals entire, erect in fruit. Petals white, suborbicular, base shortly clawed. Stamens many; filaments linear, glabrous. Pistils much longer than stamens; style and ovary glabrous. Aggregate fruit small, enclosed in calyx; pyrenes rugose, alveolate. Fl. May–Jun, fr. Jul–Aug.

Ravines, roadsides, montane valleys, forests; 1400--2100 m. SE Yunnan.