Deciduous trees or shrubs, glabrous to tomentose. Young branches quadrangular. Leaves opposite, subopposite or alternate, sessile or petiolate. Inflorescence a terminal panicle. Flowers subsessile or pedicellate, 2-bracteate, bracteolate, 6-merous. Hypanthium infundibuliform. Petals corrugate-unguiculate. Stamens numerous, reclinate, inserted at the base of the hypanthium, exserted or included. Ovary subglobose, 3-6-locular; style curved. Capsule exceeding the hypanthium, 3-6-valved. Seeds winged at the top.