To confirm the registration of an Australian native hybrid & view its composition/progeny: (Database as at 1st April 2018 RHS registrations)
For non-Australian Dendrobium hybrids use the Dendrobium Hybrids checklist here
Sarco. Cliona= Yvette x hartmannii ( has 9 hybrid progeny ) registered: 16/11/2009 by Ingram G. E.
Species composition summary:
Sarco. Cliona = Yvette x hartmannii = [Cherie x Fitzhart] x hartmannii
Fitzhart = hartmannii x fitzgeraldii
Cherie = Fitzhart x fitzgeraldii = [hartmannii x fitzgeraldii] x fitzgeraldii