Polyscias oahuensis is a species of tree in the ivy family known by the common name 'ohe mauka.

[2] It is endemic to Hawaii, where it occurs on all the major islands except for Niihau and Kahoolawe.

[3] This tree has compound leaves each made up of 7 to 15 dull leaflets.

The fruits are black or purple in color and their seeds are dispersed by birds.

[3] The tree grows in moist to wet island forests.