To confirm the registration of an Australian native hybrid & view its composition/progeny: (Database as at 1st January 2020 RHS registrations)
For non-Australian Dendrobium hybrids use the Dendrobium Hybrids checklist here
Sarco. Melody's Delight= falcatus x Val registered: 11/01/2020 by Western K.
Species composition summary:
Sarco. Melody's Delight = falcatus x Val = falcatus x [Sweetheart x Heidi]
Heidi = Fitzhart x hartmannii = [hartmannii x fitzgeraldii] x hartmannii
Sweetheart = Fitzhart x Heidi = [hartmannii x fitzgeraldii] x Heidi
Fitzhart = hartmannii x fitzgeraldii