Manual of the New Zealand Flora.

5. Ackama, A. Cunn

5. Ackama, A. Cunn.

Small trees. Leaves opposite, pinnate, stipulate. Flowers small, unisexual, in compound panicles. Calyx-tube short, lobes 5, ovate-triangular, persistent, valvate. Petals 5, inserted under the margin of a perigynous disc, scarcely longer than the calyx. Stamens 10, inserted with the petals; filaments filiform, the alternate ones longer; anthers didymous. Ovary free, 2-celled; styles 2, persistent; ovules numerous in each cell. Capsule small, coriaceous, turgid, 2-celled, septicidally 2-valved. Seeds ovoid, apiculate, hairy; embryo cylindric, in the axis of fleshy albumen.

Besides the New Zealand species, which is endemic, there is another from Australia. The genus only differs from Weinmannia in the paniculate inflorescence and valvate calyx.