Subperennial climber, 2-5 m long, glabrescent (hairs c. 0.1 mm long); main stem c. 5 mm thick. Tendrils glabrous or harshly hairy. Leaves: petiole 1.5-4 cm long, (scabrous-)hairy, hairs to 1 mm long; blade unlobed or occasionally hastately lobed, subcircular, ovate(-elliptic) or elongate-triangular in outline, 5-12 by 4-8 cm, both surfaces glabrous but scabrous, except for sparse-hairy veins, cystoliths sometimes apparent, base broadly rounded or shallowly truncate-cordate, margin entire or sparsely shallowly dentate. Male inflorescences glabrescent; peduncle slender, 1-2 cm long, 0.2 mm thick; raceme (0.2-)0.5-3 cm long, 3-25-flowered. Male flowers: pedicel 2-10 mm long; perianth 5-8 mm diam.; receptacle-tube urceolate, 3.5-4.5 by 2.5-3.5 mm, outside glabrous, inside with a broad band of dense, c. 1 mm long hairs, 1.5-2 mm below the throat; sepals (0.5-)1 mm long, glabrous, adaxially with a short spur (Fig. 32a, f); petals (ob)ovate-elliptic, 3-4 by (2-)2.5-3 mm, blunt or rounded, papillose (gland-)hairy, (creamy-)white, ± recurved at anthesis and exposing anthers; filaments c. 0.5 mm long, rather thick, anthers broad-ellipsoid or subcircular, 1.2-1.5 mm diam., orange, contrasting with the white corolla, thecae short-ellipsoid, ± curved, sublateral with broad connective (Fig. 32); disc subglobose, c. 1.5 mm diam., 3-parted in the upper third. Female flowers: pedicel 2-10 mm long; ovary long-fusiform, glabrous, 10(-15) by 2.5 mm, at apex ± narrowed into a neck 2-3 mm long; perianth as in male flowers but larger, 10-12 mm diam., inside faintly hairy; style c. 4 mm long, glabrous, stigma c. 3 mm diam., consisting of 3 thick lobes densely set with slack (pendent) hairs 1-1.5 mm long; staminodes absent; disc a depressed ring-shaped cushion, c. 1 by 2.5 mm. Fruit ripening dark green, paler striped, (4-)5-8 by 1-1.5 cm; pulp greenish white; fruiting pedicel 0.4-1.5 cm long. Seeds 7-8 by c. 4 by c. 1.5 mm.
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