Guettarda insularis is a species of flowering plant. It is a large shrubby tree native to Socorro Island, the largest of the Revillagigedo Islands which lie west of Mexico's Pacific coast.
Guettarda insularis is prominent in Socorro's higher-elevation forests, which occur between elevation. Other forest canopy trees include Ilex socorroensis, Sideroxylon socorrense, and Psidium oligospermum.Ricardo Rodriguez-Estrella, Eustolia Mata, Laura Rivera, Ecological Notes on the Green Parakeet of Isla Socorro, Mexico, The Condor, Volume 94, Issue 2, 1 May 1992, Pages 523–525, https://doi.org/10.2307/1369224
The fruit of the tree is eaten by the Socorro parakeet (Psittacara brevipes).
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