Cattleya milleri is accepted species in  the family Orchidaceae  subfamily: Epidendroideae, tribe: Epidendreae, subtribe: Laeliinae,  
Genus Cattleya   subgenus Parviflorae  section: Parviflorae   series: Parviflorae 
Infraspecific taxa recognized within Cattleya milleri: infraspecific taxa
This species is found in Brazil (Minas Gerais).