Lianas, slender. Branchlets with longitudinal ridges, glabrous or sparsely pilose; tendrils unbranched. Leaves 3-foliolate; petiole 2-7.5 cm; petiolules winged adaxially, glabrous or sparsely pilose, central petiolule 0.5-1.8 cm, lateral petiolules 3-5 mm; leaflets lanceolate, elliptic-lanceolate, or ovate-lanceolate, 3-10 × 1.5-3 cm, glabrous, lateral veins 5 or 6 pairs, veinlets inconspicuous, base cuneate or rounded, base of lateral leaflets asymmetric and subrounded, margin with 4-9 teeth on each side, apex acuminate, rarely acute. Inflorescence small umbelliform dichasium, axillary, 1-5 cm, with nodes and bracts, or pseudoterminal without nodes and bracts; peduncle 1.2-2.5 cm, pubescent. Pedicel 1-2.5 mm, gray pilose. Buds oval, 1.5-2 mm, apex rounded. Calyx saucer-shaped; teeth fine, ovate-triangular. Petals ovate, 1.3-1.8 mm, apex corniculate, glabrous. Stamen 4; anthers yellow. Disk conspicuous, 4-lobed. Ovary coniform, lower part of ovary adnate to disk; style short; stigma 4-lobed. Berry globose or obovoid-spheroid, ca. 6 mm in diam., 1-seeded. Seed obovoid-elliptic, base rounded, apex retuse, surface smooth. Fl. Apr-Jun, fr. Aug-Nov.
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