Shrubs or small trees, often spinescent. Leaves alternate, sometimes clustered, entire or shallowly toothed, sometimes emarginate. Inflorescence a terminal panicle or raceme (rarely reduced to a single flower); sepals free, often caducous; petals free, narrowly oblong or obovate, spreading, subequal to stamens; stamens free, anthers shorter than filaments, opening by 2 longitudinal slits. Fruit a flattened broadly obovoid to orbicular, 2-valved capsule, opening apically and along the midline; seeds few to several, flattish, reniform.
Endemic Australian genus of 7 species.