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.