The orchid Dendrobium Moira Stewart is a hybrid registered with the Royal Horticultural Society by L.B.Stewart in 1960.
Top three species ancestors and their influences are

• Dendrobium mirbelianum (50.00%)  section: Spatulata 
• Dendrobium bigibbum (25.00%)  section: Phalaenanthe 
• Dendrobium discolor (25.00%)  section: Spatulata