Lianas, semiwoody. Branchlets terete, with longitudinal ridges; tendrils digitately 4-7-branched. Leaves 3-foliolate; petiole 1.5-9.5 cm; central petiolule 5-6 mm, lateral petiolules 3-4 mm; leaflets rhombic-oval or elliptic, 3-11 × 1.5-7 cm, lateral veins 6 or 7 pairs, veinlets inconspicuous, base of central leaflet cuneate, base of lateral leaflets asymmetric and subrounded, margin undulate with 6 or 7 teeth on each side, teeth apiculate, apex acuminate or acute. Compound umbel, pseudoterminal on lateral branches, base with 1 or 2 leaves, 2.5-5.5 cm; peduncle 1-3 cm. Pedicel 2-3 mm. Buds oval, 1.5-2.5 mm, apex rounded. Calyx shallow and saucer-shaped; teeth 4. Petals elliptic, 1.5-2.3 mm, apex pileate. Filaments filiform; anthers yellow, oblong, distinctly short and abortive in female flowers. Disk distinct and 4-lobed in male flowers, annular in female flowers. Ovary coniform, lower part adnate to disk; style inconspicuous; stigma expanded, 4-lobed. Berry spheroid, 7-10 mm in diam., 1-or 2-seeded. Seeds elliptic, base rostrate, apex rounded. Fl. Feb-Apr, fr. Jun-Nov.
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