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. Val = Sweetheart x Heidi Registration: 2008 by Laurent M.J.
falcatus = Melody's Delight 2020 Western K.
Heidi = Kulnura Bay Barrita -Barrie S.