Shrubs erect or climbing, to 3 m tall. Branchlets brown or reddish brown, yellow sericeous-villous, gradually glabrescent, with sparse, curved minute prickles. Leaves simple; petiole 2–3 cm, densely yellow sericeous-villous, with sparse, curved prickles; stipules caducous, broadly ovate to oblong, 6–8 mm, abaxially yellow sericeous-villous, laciniate, lobes lanceolate; blade narrowly ovate, rarely elliptic, 10–13 × 6–8 cm, lateral veins 8–10 pairs, raised abaxially, abaxially densely rusty yellow tomentose, with long silky rusty yellow hairs along veins, adaxially glabrous, base rounded, margin undivided, sparsely shallowly sharply serrate, apex acuminate. Inflorescences terminal and axillary, terminal ones cymose panicles, loose, 10–18 cm, many flowered, axillary ones subracemes, shorter; rachis and pedicels rusty yellow sericeous-villous, with sparse, minute prickles; bracts broadly ovate to oblong, 5–7 mm, yellow sericeous-villous, margin laciniate; lobes lanceolate. Pedicel not more than 1 cm. Flowers 1–1.4 cm in diam. Calyx abaxially densely rusty yellow sericeous-villous; sepals erect after anthesis, narrowly ovate to ovate-lanceolate, 6–8 × 4–5 mm, apex acute, outer sepals divided, inner sepals entire, margin tomentose. Petals white, suborbicular to broadly obovate, shorter than sepals, base shortly clawed. Stamens many; filaments linear; anthers villous. Pistils numerous, longer than stamens, glabrous. Fruit unknown. Fl. Jun–Jul.
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