Trees or rarely shrubs, mostly monoecious, deciduous or evergreen; buds enclosed by scales. Leaves alternate, distichous, simple, petiolate, gland-dotted; margin crenate, toothed, or shallowly lobed; stipules peltate or basally attached. Inflorescences of short axillary, bracteate, mostly 3-flowered dichasia, the central flower sometimes abortive. Perianth a single connate, usually 6-lobed whorl. Flowers unisexual; male flowers sessile or shortly pedunculate, stamens 4–90; female flowers above the males, subtended by an involucre of 4-ranked bracts, these later forming a cupule around the fruits; ovary inferior, of usually 3 carpels, each with its own style. Fruit a cupule containing a central 2-winged nut and 2 lateral 3-winged nuts.
As recognised here, 1 genus with c. 35 species from PNG, Solomon Islands, New Zealand, SE Australia and South America, mostly in tropical and temperate rainforests. Four genera are sometimes recognised (see Heenan & Smissen, Phytotaxa 146:1–31 (2013)): in this classification, the Victorian species becomes Lophozonia cunninghamii (Hook.) Heenan & Smissen.