Flora costaricensis Family #39 Orchidaceae, tribe Cymbidieae, subtribe Zygopetalinae - Pupulin, Franco (Field Museum of Natural History, 2010)

Flora de Nicaragua - Stevens, Warren Douglas, 1944 - (Missouri Botanical Garden Press, 2001)

Manual de plantas de Costa Rica - Hammel, Barry Edward, 1946 - (Missouri Botanical Garden, 2003)