Shrubs scandent. Branchlets brown to dark reddish brown, slender, densely gray-villous, with sparse, intermixed purplish red glandular hairs and slightly curved prickles. Leaves simple; petiole 5–10 mm, rarely to 2 cm, densely villous, with sparse, intermixed glandular hairs, with minute prickles; stipules 8–11 mm, palmately laciniate, lobes linear, villous; blade ovate-lanceolate or ovate-oblong, 7–16 × 3.5–6 cm, lateral veins 5 or 6 pairs, raised abaxially, abaxially densely gray tomentose, intermixed villous, with sparse, minute prickles along veins, adaxially appressed villous, more densely so along veins, base cordate, basal incision shallow, broad, basal 2 lobes short, not touching, margin tenuously serrate, lobed, apex acuminate. Cymose panicles, large, 12–24 cm; rachis and pedicels densely villous, with unequal long purplish red stipitate glandular hairs and sparse, minute prickles; bracts 6–9 mm, palmately laciniate; lobes linear, villous, stipitate glandular. Pedicel 0.8–1.2 cm. Flowers ca. 8 mm in diam. Calyx purplish red, abaxially densely villous, purplish red stipitate glandular; sepals ovate-lanceolate, 5–10 × 2.5–5 mm, margin entire, apex shortly acuminate. Petals white, sometimes absent. Stamens many, shorter than sepals; filaments linear. Pistils relatively few, shorter than stamens, glabrous. Aggregate fruit purplish black, globose, 4–6 mm in diam., glabrous. Fl. May–Jun, fr. Jul–Aug.
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