Lianas, robust, woody. Branchlets terete, tuberculate, glabrous; tendrils unbranched. Leaves pedately 5-foliolate; petiole 3-7.5 cm; central petiolule 0.5-1.5 cm, petiolules of lateral leaflet complex 0.5-1.8 cm, lateral petiolules short or lateral leaflets sessile, glabrous; leaflets obovate-elliptic or obovate-lanceolate, 5-12 × 2.5-5 cm, glabrous, lateral veins 5-8 pairs, veinlets inconspicuous abaxially, raised adaxially, base cuneate, base of lateral leaflets asymmetric, margin 4-9-toothed on each side, teeth sharp, apex acute or mucronate. Compound dichasium terminal, axillary, or pseudoterminal, axillary inflorescences with nodes and bracts; peduncle 1-6 cm, glabrous. Pedicel 2-4 mm, glabrous. Buds bottle-shaped, 1.5-2 mm, apex subtruncate. Calyx cupular, glabrous, margin undulate. Petals elliptic, 1.3-1.5 mm, apex corniculate, glabrous. Filaments filiform, ca. 1 mm; anthers yellow, ovoid-elliptic, ca. 0.9 × 0.7 mm. Disk conspicuous, 4-lobed, inconspicuous and annular in female flowers. Ovary ovoid-coniform, lower part of ovary adnate to disk; style short; stigma 4-divided. Berry purple-black, ovoid, 1-2 cm in diam., 2-or 3-seeded. Seeds obovoid-triangular, base sharp, apex rounded or retuse. Fl. Apr-May, fr. Sep-Dec.
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