Stems twining, slender, minutely tuberculate; sparsely hirsute, glabrescent or glabrous. Leaves ovate, 4-7 by 2½-3½ cm, cordate at the base with rounded basal lobes, gradually attenuate towards the obtuse mucronulate apex, entire, glabrous; lateral nerves 8-10 on either side of the midrib; petiole 1½-2½ cm, glabrous or sparsely hairy towards the apex. Inflorescences glabrous, 6-15 cm long, peduncles terete, smooth, 4-7 cm, 1-3 times dichasially ramified at the apex, the ultimate ramifications monochasial, all with oblong to ovate, concave, 2-4 mm long, persistent bracts. Pedicels 5-6, in fruit to 8-9 mm long. Flower-buds obtusish. Sepals glabrous, unequal, 2 outer ones shorter, 4 mm long, oblong to oblong-elliptic, obtuse, mucronulate, inner ones 6 mm long, broadly ovate to orbicular, obtuse or subretuse. Corolla broadly funnel-shaped, ca 18 mm long, white, glabrous, inside below the hairy base of the filaments with two rows of hairs; the broad basal pilose part of the filaments with an incurved appendage at the apex. Ovary glabrous. Capsule subglobular, mucronate, ca 7 mm high, 2-celled, 4-valved; valves reticulately wrinkled. Seeds 2 in each cell, ca 3½ mm long, dull black, pubescent, villose at the edges.
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