Branchlets terete, brown pubescent; old branches usually with woody wings; tendrils 5-9-branched, young apex enlarged as ball-shaped adhesive disks. Leaves simple, 3-lobed or rarely undivided; petiole 2-9 cm, densely ferruginous pubescent; blade obovoid, 6-20 × 5-16 cm, abaxially densely ferruginous pubescent, adaxially pubescent, basal veins 5-7 pairs, lateral veins 3-5 pairs, veinlets inconspicuous or slightly raised, lobes triangular, base cordate, margin with large teeth, apex acute. Inflorescence 1.5-5 cm; peduncle 0.7-2.5 cm, ferruginous pilose. Pedicel 0.5-1.5 mm, nearly glabrous. Buds obovoid-elliptic, 3-4 mm, apex rounded. Calyx undulate at margin. Petals elliptic, 2.7-3.7 mm, glabrous. Filaments 0.8-1.5 mm; anthers 1-1.8 mm. Disk inconspicuous. Ovary elliptic; style conspicuous, base slightly enlarged; stigma inconspicuously raised. Berry 0.8-1.1 cm in diam., 1-or 2-seeded. Seeds obovoid, base tapering into a short rostrum, apex rounded. Fl. Jul-Aug, fr. Sep-Oct.
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