Lianas, woody. Branchlets terete, with longitudinal ridges, glabrous; tendrils unbranched. Leaves palmately 3-5-foliolate; petiole 8-11 cm; central petiolule 2.5-4.5 cm, lateral petiolules 0.5-1.5 cm, glabrous; leaflets glabrous on both surfaces, lateral veins 5 or 6 pairs, veinlets inconspicuous; central leaflet obovate-elliptic, 8-15 × 5-8.5 cm, base broadly cuneate; lateral leaflets rhombic-ovate, base asymmetric and subrounded, margin with 3-5 fine teeth on each side, apex acute. Inflorescence a large compound dichasium, axillary or pseudoterminal; peduncle 1-2.5 cm, pilose, then glabrescent. Pedicel 1-2.5 mm, pubescent, then nearly glabrescent. Buds elliptic or obovoid-elliptic, 1-1.2 mm, apex rounded. Flowers small. Calyx teeth inconspicuous, pubescent, margin undulate. Petals galeate, pubescent. Anthers yellow, ovoid. Disk well developed, 4-lobed. Lower part of ovary adnate to disk in female flowers; ovary cylindrical; style absent; stigma truncate, slightly 4-lobed. Berry purple-black when mature, elliptic, 1-1.5 cm × 6-10 mm, 1-or 2-seeded. Seeds elliptic and flat, base rostrate, apex retuse, ventral holes furrowed nearly to apex. Fl. Oct-Dec, fr. Dec to Apr.
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