Much branched spacious liana, 10-20 m long, scabrous pale brown hairy, hairs 1 mm long; leafy stem 5 mm diam.; dioecious. Probract absent. Tendrils 2-(or 3-)branched, finely harshly hairy. Leaves: petiole 4-4.5 cm long; blade green on drying, membranous, simple, unlobed or in juvenile or shooting leaves 5-angular or-lobed, to c. 1/4 deep, in outline ovate-oblong, 9-22 by 6-13 cm, finely scabrous, glands many, small, scattered, cystoliths often present, base at the transition to the petiole at each side with a small bulging auricle, 3-4 mm diam., each inside with 3-5 crowded glands, blade margin finely dentate, teeth 0.5-1 mm long; basal veins 5(-7). Inflorescences on leafless shoots hanging down close to the forest floor. Male inflorescence usually formed below the leaves, consisting of 1 or 2 (or 3) racemes, fascicled, horizontal or drooping, peduncle short, rachis slender, 4.5-12 cm long, 1(-1.5) mm thick, 10-20-flowered; bracts subpersistent, shifted upwards on the pedicel for 1-3 mm, narrowly elliptic, 5-8 mm long, margin coarsely shallowly dentate, glands several, near the margin. Male flowers: pedicel 6-10 mm long, persistent; receptacle-tube ± urceolate, 15(-20) mm long, at throat 6(-8) mm wide, consisting of a ± campanulate upper half and a swollen lower half, inside demarcated by a diaphragm-like raised rim; sepals (long-)triangular, 2-3 mm long; petals in bud folded into a ± conical body with free apices, 10-12 mm long, expanded petals broadly cuneate, c. 10 mm long, threads 6-8 mm long; synandrium truncate, c. 3.5 by 2.5 mm, anthers tightly appressed, but not fused, filaments glabrous, with few hairs on thickened base, inserted halfway on the receptacle-tube where it is ± contracted; disc absent. Female flowers 1 or 2 in short raceme; pedicel c. 10 mm long; ovary subglabrous, ellipsoid, c. 15 by 6 mm; receptacle-tube c. 12 mm long; sepals triangular, c. 2 mm long. Fruit on leafless shoots, one or two per infructescence, ripening green, white-striped, narrowly ellipsoid, 13-16 by 4.5-5.5 cm, base subobtuse, apex acute, pericarp thin, pulp white, bitter; fruiting pedicel 2.5-3 cm long, 4-5 mm thick. Seeds compressed, circular, 10 mm diam., margin broad, radiately ribbed.
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