Lianas, woody. Branchlets terete, with longitudinal ridges, transversely corrugated when dry, pubescent, then glabrescent; tendrils unbranched. Leaves pedately 5-foliolate; petiole 4-10.5(-15) cm; central petiolule 1-2.5 cm, petiolules of lateral leaflet complex 1-2.5 cm, lateral petiolules 0.5-2 cm, transversely corrugated when dry, sparsely pubescent, then glabrescent; leaflets only pubescent abaxially on veins, then glabrescent, lateral veins 7-9 pairs, veinlets raised abaxially; central leaflet elliptic or elliptic-lanceolate, 12-25 × 4-7 cm, base broadly cuneate, margin 6-8-toothed on each side, apex acute or acuminate; lateral leaflets ovate-lanceolate or ovate-elliptic, 6-20 × 2.5-7 cm, base cuneate or subrounded, margin 4-7-toothed on each side, apex acute, acuminate, or obtuse. Inflorescence umbelliform, axillary, with nodes and bracts at lower portion; peduncle 1.3-2 cm, pubescent. Pedicel (2-)3-4 mm, pubescent. Buds obovoid, 2.5-3.5 mm, apex subtruncate. Calyx shallow and saucer-shaped, papillose, teeth inconspicuous. Petals elliptic, 2-3 mm, apex corniculate, papillose. Anthers yellow, elliptic. Disk inconspicuous and annular in female flowers. Ovary ovoid, lower part of ovary adnate to disk; style inconspicuous; stigma 4-lobed. Berry globose, 1-1.2 cm in diam., 2(or 3)-seeded. Seeds obovoid, base sharp, apex retuse, ventral holes furrowed upward from middle to apex. Fl. Jun, fr. Aug-Dec.
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