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. Kirra-Lea= Heidi x fitzgeraldii ( has 10 hybrid progeny ) registered: 14/07/1995 by Field G.
Species composition summary:
Sarco. Kirra-Lea = Heidi x fitzgeraldii = [Fitzhart x hartmannii] x fitzgeraldii
Fitzhart = hartmannii x fitzgeraldii