Stem wide-climbing, slender, firm, naked. Petioles 1–2 in. long, slender, firm, glabrous, slightly tomentose when young. Leaves rotundate-cordate in general outline, deeply 5-lobed, 3–5 in. broad each way when the plant is in flower, the basal lobes rounded, 1/2– 3/4 in. deep, the terminal one spathulate, the rounded sinuses on both sides of it reaching halfway down the leaf, the edge all rounded, furnished with irregular, triangular, mucronate teeth, texture membranous, the upper surface full green and glabrous, the lower paler green and shining when mature, slightly pubescent on the veins in the young plant. Tendrils slender, copiously branched. Flowers in lateral subcymose panicles. Peduncle 1 in. or more long, firm, naked; pedicels very short, pubescent. Calyx loosely cyathiform, 1/2 line across, membranous towards the border, bluntly 5-lobed. Unexpanded corolla subglobose. Petals 5, 1/2 line long. Stamens 5. Ovary roundish, 2-celled, each cell 1-ovulate; stigma sessile.
