A shrub or tree. It can grow up to 30 m high. The young branches can be velvety. The leaves are opposite and have 3 leaflets. The leaf stalks can be 2-15 cm long. The leaflets are narrowly oval and 4-23 cm long by 3-7 cm wide. They taper to the tip and the base is unequal. They have small hairs when young. The flowering bunches are in the axils of leaves. These are 2-32 cm long. The flowers are greenish-white and without stalks. The flowers are usually of one sex. The fruit are oval, 4-valved follicles having a cavity in the centre. They are 6-10 mm long. The seeds are round or flattened and 3-6 mm long.