Perennial climbers. Roots tuberous. The stems twining, tuberculate or smooth. Leaves ovate to orbicular in outline, palmately cut to the base into 5 lobes, these lanceolate or ovate-lanceolate to ovate or elliptic, 3-10 cm long, pseudostipules present. Flowers of 1-to few-flowered cymes. Sepals ovate, obtuse to acute, mucronulate, 4-6.5 mm long. Corolla purple or white with a pinkish or purplish base inside the tube, 5-6 cm long. Fruit capsular, subglo-bose, 10-12 mm long. Seeds densely short-tomentose or with long trichomes on the margins.