Tetradium
(from tetradeion, a quaternion; the parts of flowers and fruit are in fours). ORD. Rutaceae. A monotypic genus, now included, by Bentham and Hooker, under Evodia. The species is a stove, evergreen tree, requiring culture similar to Brucea.
T. trichotomum (trichotomous-racemed). fl. whitish, disposed in large, sub-terminal, trichotomous panicles; calyx short, four-parted; petals four, longer than the calyx; stamens four. April and May. l. smooth, imparipinnate; leaflets quite entire. h. 20ft. Cochin China, 1822. The proper name of this species is Evodia fraxinifolia.