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Paphiopedilum petri is species in  the family Orchidaceae  subfamily: Cypripedioideae,  
Genus Paphiopedilum  This name is a synonym of Paphiopedilum dayanum
Infraspecific taxa recognized within Paphiopedilum petri: infraspecific taxa
Paph. dayanum vinicolor form La Cour des Orchidées
Paph. dayanum Duane McDowell
Paph. dayanum Pavaphon Supanantananont
Paph. dayanum Joseph Yeo
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