Total: 3
Found in the Barranca del Cobre of Chihuahua, Mexico, growing on trees at about 1200 m. The specific epithet honours Elizabeth Gay of Tarzana, California.
Occurs in Ecuador and Peru, growing epiphytically in dry open scrub and woodland at elevations of 200-900 m.
This species is distributed in the Ancash region of Peru, growing on steep rock walls at elevations of 500 to 2500 m.