Lianas, woody. Branchlets terete, with longitudinal ridges, pubescent; tendrils unbranched. Leaves simple, papery; petiole 0.8-3 cm, sparsely pubescent, then glabrescent; leaflets elliptic or elliptic-lanceolate, 6.5-14 × 3.5-6.5 cm, abaxially pilose on veins, then glabrescent, lateral veins 8 or 9 pairs, usually 2 or 3 pairs near base, veinlets inconspicuous, base rounded, margin 8-19-toothed on each side, apex acuminate. Inflorescence umbelliform, axillary; peduncle 1-1.5 cm, pubescent. Pedicel 1.5-3 mm, densely pubescent. Buds oval, 1.5-2 mm. Calyx cupular, densely pubescent, teeth ca. 1/2 as long as petals. Petals oval, 1.3-1.8 mm, long corniculate, densely pubescent. Filaments distinctly abortive in female flowers; anthers fine, suborbicular. Disk distinct, 4-lobed. Lower part of ovary adnate to disk; style short; stigma inconspicuously expanded, 4-lobed. Berry globose, 1-1.2 cm in diam., 2-or 3-seeded. Seeds elliptic, base obtuse, apex rounded, ventral holes furrowed from 1/3 above base upward to apex. Fl. Mar, fr. Jun-Jul.
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