Large woody simple tendril tuberous-rooted monoecious perennial vine, white or pale yellow male flowers in axillary racemes, yellow corolla 12mm diameter, axillary white solitary female flowers, flowers tinged yellow, sparsely hairy dark green 8-angled fruit 40mm long x 12mm, glabrous or pilose leaves 5 to 7-lobed to 50mm across with raised points on both surfaces