Trees or shrubs; bark smooth or fibrous (not in Victoria). Leaves alternate, petiolate, venation obscure. Inflorescence cymose, axillary, triads or dichasia, 3–30-flowered. Flowers pedicellate, white to yellow; hypanthium campanulate; sepals 5, reduced to persistent projections on rim of hypanthium; petals obovate to orbicular, free; stamens mostly numerous, fused in fascicles opposite the petals, inflexed; stigma capitate; ovary half-inferior, usually 3-celled. Fruit a loculicidal capsule, half-exserted from the persistent hypanthium, splitting to base or only to hypanthium; seeds mostly winged.
About 40 species, ranging from Myanmar through South-east Asia to Australasia; 3 species in Australia.