The orchid Dendrobium Alexandra Lass is a hybrid registered with the Royal Horticultural Society by P.Horgan in 2022. It is originated by O/U
Top three species ancestors and their influences are

• Dendrobium lasianthera (62.50%)  section: Spatulata 
• Dendrobium canaliculatum (25.00%)  section: Spatulata 
• Dendrobium helix (12.50%)  section: Spatulata