Liana 4-15 m tall; leafy stem 3-5 mm diam., glabrous or hairy, often with lenticels. Tendrils 5-15 cm long, in juvenile plants at apices with irregularly shaped adhesive pads to c. 5 mm diameter. Leaves: petiole 1.5-3 cm long; blade membranous or subcoriaceous, (broadly) ovate-elliptic, 8-15 by 5-12 cm, both surfaces glabrous or hairy, base broadly rounded or cordate or sometimes somewhat hastate, apex (sub)obtuse, minutely mucronate; 2-5-pinnately veined and one pair of basal veins, reticulation distinct on lower surface. Male inflorescences glabrous or hairy, (10-)15-60 cm long, little or much branched (sometimes also branched from the base), lateral branches to 15 cm long, flowers often in bundles of up to 5, the bundles ± spaced, the larger inflorescences often from the older wood. Male flowers: pedicels rather thick, 1-3(-5) mm long, articulate at ± halfway; buds c. 2 mm diam.; corolla 5-7 mm diam.; sepals membranous, almost free, subtriangular, c. 2 mm long; petals (narrowly) ovate-elliptic, 2.5-3.5 long, apex narrowed, subacute, adaxially papillose; stamens inserted on a carnose disc, leaving the centre free, filaments 0.5-1 mm long, fleshy, anthers transversely ellipsoid, (0.5-)1 mm long. Female inflorescences 5-40 cm long, raceme-like or branched panicles, few-or many-flowered, flowers solitary (or 2). Female flowers: sepals triangular, 2-4 mm long; petals (narrowly) ovate-elliptic, 3-8 mm long, subacute, finely papillose-hairy; ovary subcylindrical-obconical, 5-12 by 2-3 mm, glabrous or hairy; styles short, stigmas with 2 incurved horizontal horns, papillose. Fruit pendulous, few to many per infructescence, variable in size, (4-)5-10 by 1.5-4.5(-5) cm, glabrous, glabrescent or hairy. Seeds 6, pale, elliptic, not ornamented, 15(-20) by 8(-10) mm, winged all around, the wings leathery, elongated and rounded at both ends, 4-6(-8) by 1.3-1.5(-2) cm.
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