The orchid Cattleya Diana (1920) is a hybrid registered with the Royal Horticultural Society by Hassall in 1920.
Top three species ancestors and their influences are

• Cattleya dowiana (75.00%)  subgenus Cattleya  section: Cattleya 
• Cattleya bicolor (12.50%)  subgenus Intermediae
• Cattleya wallisii (12.50%)  subgenus Cattleya  section: Cattleya   series: Lawrenceanae