Branchlets terete; tendrils with 6-11 branches, young apex of tendril slightly expanded as fist-shaped adhesive disks. Leaves small, 3-foliolate, rarely simple, 3-divided; petiole 7.5-15 cm, petiolules 0.5-2.5 cm; central leaflet obovate-elliptic, 6-17 × 3-7 cm, lateral veins 6 or 7 pairs, veinlets raised, base rounded, margin obtusely 6-9-toothed on each side; lateral leaflets ovate-elliptic, base extremely asymmetric, margin with 11-15 obtuse teeth outside and 5-7 teeth inside, apex acuminate or cuspidate. Polychasium terminal or pseudoterminal, with a conspicuous, well-developed axis; peduncle 2-3 cm, glabrous to ferruginous. Pedicel 2-3 mm. Buds ovoid, 2.5-3 mm, apex rounded. Calyx undulately 5-divided. Petals elliptic, 2.3-2.8 mm high, inside apex with ligulate appendages, apex 2-or 3-divided, ca. 1.2 mm, glabrous. Filaments 0.5-1.1 mm; anthers narrowly elliptic, 0.5-0.9 mm. Disk inconspicuous. Ovary ovoid; style conspicuous, slightly thick at base; stigma not expanded. Berry globose, 8-10 mm in diam. Seeds 1 or 2, obovoid-elliptic, base rostrate, apex rounded. Fl. Apr-Jul, fr. Aug-Oct.
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