Erect shrubs, 0.3–3 m high, glabrous. Leaves small, opposite, decussate, flat or slightly concave above. Inflorescences axillary, each of 1–3 flowers, often in terminal clusters. Flowers bisexual, white or pink; hypanthium obconical or cylindric, smooth, ribbed or rugulose; sepals usually 5, membranous or petaloid, elliptic to orbicular, entire; petals usually 5, free, entire, elliptic to orbicular; stamens usually 5 and opposite sepals or rarely 10 (or more) and opposite sepals and petals, anthers versatile, opening by pores, connective gland prominent, clavate or urceolate; ovary inferior, 1-celled, fused to hypanthium; ovules 2, or 4 in 2 superposed layers; style shortly exserted. Fruit small, dry indehiscent; seed usually solitary.
About 32 species, in southern, central and north-eastern Australia.