The orchid Paphiopedilum Ultor is a hybrid registered with the Royal Horticultural Society by R.Young in 1903.
Top three species ancestors and their influences are

• Paphiopedilum lawrenceanum (50.00%)  subgenus Sigmatopetalum  subsection: Barbata 
• Paphiopedilum sanderianum (50.00%)  subgenus Polyantha  section: Mastigopetalum