Shrubs lianoid, to 7 m tall. Branchlets brown or purplish brown, glabrous, with sparse, curved minute prickles, glaucous. Leaves simple; petiole 5–7 mm, adaxially puberulous; stipules free, 6–9 mm, glabrous, palmately divided above middle, lobes lanceolate; blade lanceolate, 7–16 × 1.5–3 cm, lateral veins 8–11 pairs, raised abaxially, impressed adaxially, subleathery, abaxially densely gray tomentose, adaxially glabrous, base rounded to shallowly cordate, margin with shallow sharp minute teeth, apex long acuminate. Inflorescences terminal or axillary, large cymose panicles, 14–20 cm, axillary ones shorter; rachis and pedicels glabrous or pubescent; bracts smaller than stipules, apex palmately lobed; lobes linear or nearly subulate, glabrous. Pedicel 1–1.4 cm. Flowers 6–9 mm in diam. Calyx purplish red, abaxially densely gray tomentose, with sparse, intermixed glandular hairs; tube pelviform; sepals lanceolate, 6–9 × 2–3 mm, margin entire, apex subulate-acuminate or caudate. Petals absent. Stamens shorter than sepals; filaments red, linear, glabrous. Pistils few; ovary glabrous; styles purplish red, ca. 4 mm, rarely as long as stamens. Aggregate fruit purplish black, with few drupelets, glabrous; pyrenes large, coarsely rugose. Fl. May–Jun, fr. Jul–Aug.
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