Phalaenopsis gigantea is accepted species in  the family Orchidaceae  subfamily: Epidendroideae, tribe: Vandeae, subtribe: Aeridinae,  
Genus Phalaenopsis   subgenus Polychilos  section: Amboinenses 
Infraspecific taxa recognized within Phalaenopsis gigantea: infraspecific taxa
This species is found in Borneo.