Vines, herbaceous. Branchlets slender, with longitudinal ridges, slightly 4-ridged, usually glaucous, glabrous; tendrils bifurcate, with one branch poorly developed and short. Leaves simple; stipules brownish, oblong, ca. 3 × 2 mm, membranous, glabrous; petiole 1.5-3 cm, glabrous; leaf blade hastate, 5-11 × 2-4 cm, glabrous, basal veins 3-5, lateral veins 3 or 4 pairs, veinlets inconspicuous, base cordate or nearly truncate, notch obtuse, margin 5-10-toothed on each side, teeth bent forward or slightly backward, apex caudate-acuminate. Inflorescence umbelliform, rarely dichotomous, terminal or leaf-opposed; peduncle 1-2.5 cm, glabrous. Pedicel 1.5-3.5 mm, nearly glabrous. Buds oval, 2-3 mm, apex obtuse. Calyx nearly glabrous, entire or undulately lobed. Petals triangular-ovate, 0.8-1.8 mm, glabrous. Anthers oval. Lower part of ovary adnate to disk; style short; stigma slightly expanded. Berry ca. 1 cm in diam., 1-seeded. Seed surface with sparse ridges, ventral holes inconspicuously linear. Fl. May-Jul, fr. Jul-Aug.
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