Lianas, woody. Branchlets terete, ± with versatile villous hairs; tendrils racemosely 5-7-branched. Leaves simple, undivided or slightly 3-lobed; petiole 1.5-9 cm; stipules ovate-elliptic or oval, 2-3 mm, herbaceous, apex rounded; leaf blade ovate-orbicular, 5-15 × 2-5 cm, adaxially with sparse versatile and villous hairs when young, then nearly glabrescent, basal veins 5-7, lateral veins 4 or 5 pairs, veinlets inconspicuously raised or abaxially slightly raised, base cordate, margin with irregular teeth or undulate, fine teeth in curves of wavy margin, apex acuminate, mucronate or acute. Compound umbel terminal or leaf-opposed; peduncle 1.5-3.5 cm. Pedicel 2-6 mm. Buds oval, 2-3 mm, apex rounded. Calyx teeth inconspicuous. Petals oval, 1.7-2.7 mm. Anthers oval, abortive in female flowers. Disk undulately 4-lobed. Lower part of ovary adnate to disk; style conical, base slightly thick; stigma slightly expanded. Berry 6-8 mm, 1-seeded. Seed surface with slightly raised ridges. Fl. Apr-May, fr. May-Jun.
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A large climber. It sheds its leaves. The stems are soft and have holes. The stems are 15 cm across. The stem climbs 24 m high in trees. The tendrils are forked. The leaves are roundish and deeply cut at the base. They are oval to heart shaped. They taper towards the tip. There are teeth with sharp points. There are rusty hairs underneath when young. The leaves are 7.5-12.5 cm long and 10-15 cm across and have 5-7 angles. The flowers are cream or red. They are 2.5 mm long. They occur in slender flat topped arrangements. The fruit are pear shaped. They are 8-12 mm long. There is a knob at the tip. They have one seed.
It is a subtropical plant. It grows in semi-evergreen jungles. In Nepal these are at 1400-2500 m altitude. They grow in open, rocky places. In Sikkim it is recorded between 400-800 m above sea level. In Sichuan and Yunnan.
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