Shrubs or small trees, dioecious (in Victoria). Leaves alternate, simple, entire, with fine oil dots, aromatic when crushed; stipules absent. Flowers solitary in axils of crowded bud scales, resembling a terminal umbel and later becoming pseudowhorled, actinomorphic, unisexual (in Victoria), mostly white; sepals fused, completely enclosing bud, splitting into 2 or 3 lobes, often deciduous; petals 2–many; stamens few-many, with slender filaments; carpels 1–several, free, stigmatic surface extended along suture; sterile carpels often present in male flowers. Fruit solitary or a cluster of berries, mostly 1–6 per flower.
About 40 species, in Malesia and Australia; 8 in Australia.