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Zygopetalum maxillare is accepted species in  the family Orchidaceae  subfamily: Epidendroideae, tribe: Cymbidieae, subtribe: Zygopetalinae,  
Genus Zygopetalum 
Infraspecific taxa recognized within Zygopetalum maxillare: infraspecific taxa
This species is found in SE. & S. Brazil to NE. Argentina.