Climbers, herbaceous. Branchlets longitudinally obtusely 4-ridged, glaucous, glabrous; tendrils unbranched. Leaves simple; stipules brownish, oval, 3-4 × 1.5-2 mm, membranous, glabrous; petiole 1.5-7.5 cm, glabrous; leaf blade cordate, 5-11 × 4-8 cm, basal veins 5, sometimes lateral veins connate at base, lateral veins 3 or 4 pairs, veinlets inconspicuous, base cordate, margin 18-23-toothed on each side, teeth fine, apex acuminate, glabrous. Inflorescence umbelliform, terminal or leaf-opposed; peduncle 0.7-2 cm, glabrous. Pedicel 2-4 mm, glabrous. Buds oval, 1-1.5 mm, apex rounded. Calyx entire. Petals elliptic, 0.7-1.2 mm, glabrous. Anthers oval. Lower part of ovary adnate to disk; style conical; stigma slightly expanded. Berry globose, ca. 1 cm, 1-seeded. Seed elliptic, surface with sparse ridges, raphe raised, ventral holes retuse. Fl. Jun-Aug, fr. Sep-Oct.
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A vine. The branches have 4 ridges along them. The tendrils are not branched. The leaves are simple and 5-11 cm long by 4-8 cm wide. The flowers are in a flat topped group. The fruit are 1 cm across and have one seed.
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