Trichilia triacantha, the bariaco,[3] is a species of plant in the Meliaceae family endemic to Puerto Rico.

It has leaves made up of several leathery, spine-toothed leaflets and the flowers are white.

[5] The plant grows in dry forest habitat on limestone substrates, often near intermittent streams.

Two of these were composed of single individuals located several kilometers from other members of the species, and so are unlikely to reproduce.

[4] It is additionally threatened by habitat loss, and as such is a federally listed endangered species of the United States.