Shrubs, monoecious. Leaves usually alternate, simple, margins entire, recurved or revolute, sessile or petiolate; stipules absent. Male flowers solitary or in clusters or racemes, terminal or apparently axillary; female flowers solitary, adjacent to a male flower or surrounded by several males. Male flowers with calyx of 4–6 segments, fused basally; petals 4–6, longer than sepals; glands on the receptacle as many as petals and alternating with them; stamens many, filaments fused in a central column, anthers 2-celled, dehiscing longitudinally. Female flowers with perianth similar to males; ovary 3-celled, ovules 1 per cell, styles 3, basally united, bifid. Fruit a capsule, separating into three 2-valved mericarps; seeds 3 per capsule, caruncle present.
16 species from Australia and New Caledonia; 15 species in Australia.