Ackama Genus

Ackama is a genus of flowering plants in the family Cunoniaceae (order Oxalidales), first described by Allan Cunningham in 1839. Members are shrubs or trees reaching up to 12 m in height, with branchlets and young growth typically covered in short brownish hairs. Leaves are imparipinnate (pinnate with a single terminal leaflet), with sharply serrate leaflets that bear small hairy pits (domatia) on the underside at the junction of main veins; stipules are prominent, foliaceous, and heavily veined. Inflorescences are much-branched panicles up to 15 cm long, bearing numerous small flowers approximately 3 mm across with ovate sepals, narrow petals, exserted stamens, and persistent styles. The fruit is a pilose ovoid capsule 3–4 mm long, crowned by persistent sepals and styles. Some species produce useful timber. The chromosome number for the genus is 2n=32. The genus spans Southeast Asia (Philippines, Maluku), New Guinea and the Bismarck Archipelago, the Solomon Islands, eastern Australia (Queensland and New South Wales), and New Zealand, where the type species Ackama rosifolia is endemic to the North Island.