The orchid Paphiopedilum Emperor of India is a hybrid registered with the Royal Horticultural Society by Sanders[St Albans] in 1902.
Top three species ancestors and their influences are

• Paphiopedilum barbatum (25.00%)  subgenus Sigmatopetalum  section: Blepharopetalum 
• Paphiopedilum villosum (25.00%)  subgenus Paphiopedilum  section: Paphiopedilum 
• Paphiopedilum argus (25.00%)  subgenus Sigmatopetalum  subsection: Barbata