Climbers, the stems twining, much branched, perennial, appressed-pubescent to glabrate. Leaves rounded-ovate, commonly 3-lobed, 5-9 cm long, basally cordate, apically acuminate, densely pubescent to glabrous. Flowers in 1- to few-flowered cymes, the cymes usually silky white-pubescent. Sepals lanceolate to ovate to broadly-ovate, 10-20 mm long, apically acuminate to long-acuminate, pubescent to glabrate. Corolla blue or purple, rarely white, 5-7 cm long. Fruit capsular, up to 1 cm broad, globose to somewhat apically flattened, glabrous. Seeds commonly 4, tan to dark brown, glabrous.