Shrubs climbing, 0.5–1 m tall. Branchlets brownish to reddish brown, yellowish sericeous-villous when young, glabrescent, unarmed or with sparse, minute prickles. Leaves simple; petiole reddish brown, 1–1.5 cm, yellowish sericeous-villous when young; stipules caducous, free, narrowly oblong, but broader near apex, to 1 cm, palmately divided, lobes linear, soft hairy; blade oblong-lanceolate, 11–19 × 2.5–5 cm, lateral veins 7–10 pairs, subleathery, abaxially densely yellow or grayish yellow tomentose, with sparse, intermixed long soft hairs along veins, adaxially glabrous or slightly pubescent only along veins, base rounded, margin irregularly sharply serrate, teeth abruptly pointed, apex caudate. Inflorescences terminal or axillary, terminal ones short cymose panicles, 4–6 cm, few flowered, axillary ones short racemes or shortly subcorymbose, sometimes flowers fewer, in clusters; rachis and pedicels densely yellow sericeous-villous; bracts narrowly oblong, less than 1 cm, palmately lobed; lobes linear, yellow sericeous-villous. Pedicel 5–10 mm. Flowers to 1 cm in diam. Calyx abaxially densely yellow sericeous-villous; sepals erect after anthesis, broadly ovate, margin tomentose, entire or outer sepals shallowly laciniate apically, apex acute or shortly acuminate. Petals white, suborbicular or broadly obovate, nearly as long as sepals, glabrous. Stamens many, glabrous; filaments linear. Pistils 30–40, longer than stamens; style glabrous. Fruit unknown. Fl. Apr–May.

Sparse forests on slopes, broad-leaved evergreen forests; Medium elevations. SE Yunnan.