The orchid Vanda Julia Sideris is a hybrid registered with the Royal Horticultural Society by O.Kirsch in 1949.
Top three species ancestors and their influences are

• Vanda tricolor (50.00%)  section: Deltoglossa 
• Vanda coerulea (25.00%)  section: Longicalcarata 
• Vanda sanderiana (25.00%)  section: Roeblingiana