The orchid Paphiopedilum Silvara is a hybrid registered with the Royal Horticultural Society by Ratcliffe in 1964.
Top three species ancestors and their influences are

• Paphiopedilum insigne (57.52%)  subgenus Paphiopedilum  section: Paphiopedilum 
• Paphiopedilum spicerianum (22.83%)
• Paphiopedilum bellatulum (6.25%)  subgenus Brachypetalum