Acradenia Kipp. (1852), in the family Rutaceae, contains 2 species in eastern Australia.

Description Trees to 30m, and shrubs. The leaves are opposite, evergreen, with 3 leaflets. The flowers are bisexual, white, generally in flattish heads at the ends of the branches. Sepals 5–7, petals 5–7, with velvety hairs. Stamens 10–14. Ovary superior, with around 5 cells; style short. Pollination is presumed to be by bees. The fruits are separate, 1-seeded capsules around 8mm long.

Key Recognition Features The evergreen, 3-foliolate, aromatic leaves and the white flowers with velvety petals and many stamens.

Evolution and Relationships The Rutaceae is characterised by the oil-bearing cells in the leaves; these are especially conspicuous in the skins of fruit such as oranges and tangerines (Citrus).

Ecology and Geography In rainforest and by streams in Queensland, New South Wales, and Tasmania.

Comment Acradenia frankliniae Kipp., from Tasmania, is an attractive, evergreen shrub, often grown in gardens in mild areas. The second species, A. euodiiformis (F. Muell.) T.G. Hartley, is an evergreen tree for warm climates.