Shrubs or small trees, monoecious or dioecious. Leaves alternate, often viscid, simple, margins entire, recurved or flat, sessile or subsessile; stipules absent. Flowers axillary; males often clustered on recurved peduncles; females solitary; bracts present. Male flowers with 4 or 5 imbricate calyx lobes; petals minute or absent; stamens numerous; filaments short, crowded on a hemispherical receptacle; anthers 2-celled, dehiscing longitudinally. Female flowers with 4 or 5 imbricate calyx lobes that are often thicker and narrower than those of males, often enlarging after anthesis; ovary 3-celled, 3-lobed, ovules 1 per cell, stigma sessile, broad, entire or shortly 2- or 3-lobed. Fruit an ovoid capsule, on an erect, angular peduncle; seeds 1–3, obloid, smooth, shiny, caruncle present.
About 15 species, all endemic to Australia.