Herbs perennial, twining, with glabrous or minutely muricate axial parts. Roots tuberous. Stems to 10 m, thinly angular. Petiole 3-11 cm; leaf blade circular in outline, 7-18 X 7-22 cm, usually palmately 5-7-divided to or beyond middle, rarely entire or shallowly lobed; segments lanceolate or elliptic, glabrous or sparsely pubescent along midvein, entire or irregularly undulate, apex acuminate or acute, mucronulate. Inflorescences few to many flowered; peduncle 2.5-20 cm; bracts early deciduous. Pedicel 0.9-2.2 cm. Sepals ± circular, oblong to broadly elliptic, concave, equal or outer 2 shorter, 7-12 mm, glabrous, apex obtuse. Corolla pink or reddish purple, with a darker center, funnelform, 5-6 cm; limb 5-7 cm in diam., undulate. Stamens included. Pistil included; ovary glabrous. Stigma 2-lobed. Capsule ovoid, 1.2-1.4 cm. Seeds dark brown, ca. 6 mm, woolly-sericeous with long, easily detached hairs. 2n = 30.