The orchid Cattleya Queen Alexandra is a hybrid registered with the Royal Horticultural Society by Veitch in 1902.
Top three species ancestors and their influences are

• Cattleya trianae (50.00%)  subgenus Cattleya  section: Cattleya 
• Cattleya labiata (25.00%)  subgenus Cattleya  section: Cattleya 
• Cattleya purpurata (25.00%)  subgenus Crispae  section: Crispae   series: Cattleyodes