Shrubs or small trees. Leaves alternate, simple to bipinnate, margins entire or toothed to deeply pinnatisect, sessile to distinctly petiolate. Inflorescence axillary or terminal, raceme-like or paniculate, usually much longer than leaves. Flowers zygomorphic, pedicellate, in pairs subtended by a caducous bract; tepals usually white or cream, initially coherent but slit by the style on the lower side, tip globular; later all 4 tepals free to the base, twisted; anthers sessile, ovate; hypogynous glands 3, a small fourth gland rarely developing, globular; ovary stipitate, glabrous, ovules several, in 2 rows; style long and curved, tip dilated into a pollen presenter, stigma maturing after anthers. Fruit a several-seeded, leathery follicle; seeds in 2 imbricate rows, flat with a terminal wing, a yellow powdery substance present between seeds.
12 species currently recognized; 9 in eastern Australia, 3 in South America.