Microchilus maasii Ormerod, Harvard Pap. Bot. 11(2): 161, 163, f. 18–19. 2007.
TYPE: Costa Rica. Cartago: Río Atirro, La Esperanza, 800 m, 8 Oct 1974, P.J.M. Maas 1171 (holotype, F; isotype, MO; illustration of type).