Coprosma arborea is a species of tree found in New Zealand,[1] traditionally known in Māori by the name mamangi.

A typical occurrence location of the species is in the Hamilton Ecological District in New Zealand's North Island.

Lamina rather thin, glab., ovate to broad-elliptic to oblong, sts suborbicular; apex rounded or retuse, sts apiculate or mucronulate; cuneately or abruptly narrowed to petiole; margins thickened, indistinctly waved, often subcrenulate; ± 50—60 × 35–40 mm; lvs on young plants smaller, lamina ± 15–25 × 10–17 mm.

♂ in dense glomerules, terminal on main and axillary branches; calyx-teeth linear, obtuse, ciliolate; corolla funnelform, lobes ovoid, acute, ± = tube.

♀ in clusters of 2–4; calyx-teeth obtuse, ciliolate; corolla-tube short, lobes long, acute.