Description from Flora of China
Lianas large, herbaceous or woody. Inflorescences extra-axillary, umbel-like or short racemelike, occasionally branched, shorter than leaves, usually few flowered. Flowers large. Calyx without glands. Corolla subrotate; lobes overlapping to right. Corona shallowly cupular, inserted at base of gynostegium, fleshy, apex entire or shallowly undulate. Filaments connate; anthers very large, decurrent to base of column, apex acuminate; pollinia 2 per pollinarium, slender, falcate, pendulous. Stigma head scarcely umbonate. Follicles stout, cylindric-fusiform, slightly tapering to a blunt apex.
Two species: China, India, Myanmar, Sri Lanka, Thailand; one species in China.