The orchid Paphiopedilum Menthule is a hybrid registered with the Royal Horticultural Society by McBean's in 1943.
Top three species ancestors and their influences are

• Paphiopedilum spicerianum (35.94%)
• Paphiopedilum insigne (23.44%)  subgenus Paphiopedilum  section: Paphiopedilum 
• Paphiopedilum lawrenceanum (18.75%)  subgenus Sigmatopetalum  subsection: Barbata