1. (noun) large-leaved milk tree, Streblus banksii, small-leaved milk tree, Streblus heterophyllus - spreading canopy trees growing up to 12 m high with a short, stout trunk. The large-leaved variety is found in lowland forests as far south as the Marlborough Sounds, while the small-leaved variety is found in moist areas in both the North and South Islands.