The orchid Cattlianthe Monastir is a hybrid registered with the Royal Horticultural Society by Armstrong/Brown in 1916.
Top three species ancestors and their influences are

• Cattleya dowiana (87.50%)  subgenus Cattleya  section: Cattleya 
• Guarianthe bowringiana (12.50%)  subgenus Circumvola  section: Moradae