Pittosporum halophilum is a shrub in the Pittosporaceae (pittosporum) family that occurs on Molokai and its offshore islets. Shrubs are 0.4 to 1.8 m (1.3 to 6 ft) tall with grayish brown to medium brown branches. Leaves are 3.5 to 7 cm (1.4 to 2.8 in) long, the lateral veins in 5 to 9 pairs, the leaves lower surfaces with slightly raised veins and densely covered with a tan to golden yellow short matted woolly hairs. Leaf bases are wedge-shaped. Inflorescences are sparsely to densely covered with whitish gray to golden yellow short matted woolly hairs, with 5 to 10 fragrant white to cream-colored flowers. Pittosporum halophilum is observed to be functionally unisexual (separate male and female plants). The dry fruit are subcuboid (almost cube-like) to ovoid (egg-shaped) with densely tan to golden brown hairs.