Trilepisium gymnandrum is a species of Trilepisium that is endemic to the Seychelles, where it is threatened by habitat loss.

[1] Its natural habitat is subtropical or tropical moist lowland forests.

Five mature individuals are known in two sub-populations in the mid to high altitude forests of Silhouette Island.

The 18th century populations of the larger Mahé and Praslin islands have presumably been extirpated.

[1] The NPTS has established a new population on Silhouette island.