Small trees, shrubs or subshrubs. Leaves opposite, entire; the bases of opposite leaves joined by membrane-like interpetiolar stipules. Inflorescence axillary or terminal, variously cymose, simple or branched. Flowers usually small, often unisexual and plants dioecious. Calyx and corolla both (4–)5-lobed; calyx-lobes obtuse to acute, ciliate; corolla campanulate or with tube cylindric, white (in Victoria) to yellow, lobes imbricate in bud; stamens included to just exserted; stigma capitate or oblong, undivided. Fruit a septicidal capsule, with 2 carpels almost separating, usually black, woody.
About 25 species, in New Caledonia, New Zealand and Australia; c. 22 species in Australia (all endemic).