Stems twining, leafless at flowering-time, terete or slightly angular, with some appressed hairs in youth, glabrescent, more or less warty (lenticellate). Leaves ovate-oblong (or ovate), 1I-15(-17) by 5—6(-12) cm, base rounded, in young leaves broadly cuneate,apex shortly acuminate; glabrous, the nerves excepted; midrib, ca 4(-6-7) nerves on either side and subparallel minor nervation prominent beneath; petiole up to 6(-10) cm long, shortly appressed-pilose, sulcate. Inflorescences in the axils of fallen leaves on the main stem or on lateral branches; in the first case umbellately cymose, 4-8-or up to 20-flowered, in the second case also umbellately cymose, and moreover contracted into a panicle. Peduncles 10-24 mm long, flattened towards the apex, appressed-pilose. Pedicels 4-7 mm or in the central flower up to 10 mm, at the base densely, towards the apex more sparsely pilose. Sepals glabrous or sparsely pilose at the base outside; two outer ones ovate, rounded or slightly retuse at the apex, ca 6 mm long; sepal 3 slightly oblique, elliptic-orbicular, ca 6-6W2 mm long, with one thinner margin; two inner sepals elliptic-orbicular, ca 6½ mm long, with two thinner margins. Corolla funnel-shaped, ca 3½ cm long, glabrous outside, white, pink or violet towards the limb; limb shallowly lobed, ca 4-4½ cm diam. Stamens and style included. Filaments pilose at the base. Ovary glabrous, 4-celled. Fruit ovoid or ellpsoid, ca 12-14 mm long, violet or crimson.
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