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. Cherie= Fitzhart x fitzgeraldii ( has 40 hybrid progeny ) registered: 17/04/1990 by Upton W.T.
Species composition summary:
Sarco. Cherie = Fitzhart x fitzgeraldii = [hartmannii x fitzgeraldii] x fitzgeraldii