Trees and shrubs. Leaves
opposite, simple or 1-pinnate. Domatia 0. Inflorescences cymose. Flowers heterostylous, with "pin" and "thrum" forms, scented. Corolla pale cream or pink, salver-shaped; lobes 5-7, imbricate, each with a conspicuous patch of swollen brownish or purplish hairs at the base. Fruit a 2-valved, woody capsule dehiscing loculicidally. Seeds winged.