Acronychia octandra, commonly known as doughwood, silver birch or soapwood,[2] is a species of rainforest tree that is endemic to eastern coastal areas of Australia.

It has mostly trifoliate leaves with elliptic to egg-shaped leaflets, greenish-white flowers arranged in groups in leaf axils and fleshy fruit of four carpels fused at the base.

[2][3] Doughwood was first formally described in 1860 by Ferdinand von Mueller, who gave it the name Euodia octandra and published the description in Fragmenta phytographiae Australiae from specimens collected near the Clarence River by Hermann Beckler.

[4][5] In 1991 Thomas Gordon Hartley changed the name to Acronychia octandra in Australian Systematic Botany.

Acronychia octandra grows in subtropical and warm-temperate habitats from sea level to an altitude of 900 m (3,000 ft) from the McPherson Range in south-east Queensland south to near the Clarence River in New South Wales.