Lianas. Leaves opposite, petiolate. Cymes extra-axillary, racemelike, pedunculate. Flowers small. Calyx glands 5. Corolla campanulate; lobes short, overlapping to right. Corona with up to 5 minute, membranous, triangular lobes; lobes inserted opposite anthers at base of stalked gynostegium, sometimes absent. Anther appendages oblong; pollinia 2 per pollinarium, ovoid, waxy, pendulous, translator arms threadlike, corpusculum ovoid. Stigma head club-shaped, apex exserted. Follicles usually solitary, pericarp papillose. Seeds flat, margin membranous, with white silky coma.

One species: China, Myanmar.