Pupulin, F. & Díaz-Morales, M. (2018)

On the meaning of Cypripedium × grande (Orchidaceae) and its taxonomic history, with a new name for the nothospecies occurring in Costa Rica and Panama

. Phytotaxa 382 (2): 167–181. https://doi.org/10.11646/phytotaxa.382.2.2