Lianas woody. Leaves opposite, long petiolate, 3-5-veined from base. Inflorescences extra-axillary, umbel-like to short racemelike, large, long pedunculate. Calyx with many basal glands. Corolla campanulate, large; lobes overlapping to right. Corona lobes separate, inserted at base of gynostegium, linear-subulate, longer than gynostegium and exserted from corolla tube. Filaments connate; anther appendages short, sharply bent; pollinia 2 per pollinarium, ellipsoid, pendulous. Stigma head broadly rounded, depressed. Follicles fusiform or cylindric, thick, with a fibrous pericarp. Seeds ovate.

Two species: SE Asia, both in China.