Climbers with twining or prostrate stems, smooth or minutely tuberculate, glabrous or sparsely pubescent. Leaves ovate in outline, 1.5-5 cm long, broadly cordate basally, obtuse apically, the margins entire, crenate, shallowly lobed or deeply 3-lobed, glabrous or pubescent. Flowers solitary or cymose. Sepals broadly obovate to spathulate, notched at the apex, the outer two 3.5-4 mm long, the inner 5 mm long, glabrous or pilose. Corolla yellow, campanulate, 6-10 (-12) mm long. Fruit capsular, broadly conical to depressed-globose, somewhat 4-angled, 5-6 mm long, the valves wrinkled. Seeds blackish, short-pubescent or nearly glabrous, 2.5 mm long.