Phaius flavus is species in  the family Orchidaceae  subfamily: Epidendroideae, tribe: Collabieae,  
Genus Phaius   section: Phaius  This name is a synonym of Calanthe woodfordii
Infraspecific taxa recognized within Phaius flavus: infraspecific taxa
This species is found in Trop. & Subtrop. Asia to SW. Pacific.