Maxillaria powellii Schltr., Repert. Spec. Nov. Regni Veg. Beih. 17: 70-71. 1922.
TYPE: Panama. Auf Hügeln bei Panama City, C.W Powell 28 (holotype, B, destroyed; lectotype designated by Christenson (1991) AMES; isolectotypes: K, MO; illustration of type, AMES).