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. Bernice Klein= Heartlight x fitzgeraldii ( has 5 hybrid progeny ) registered: 9/11/1993 by Florafest -Klein I.
Species composition summary:
Sarco. Bernice Klein = Heartlight x fitzgeraldii = [Pinkhart x hartmannii] x fitzgeraldii
Pinkhart = Lois x hartmannii = [ceciliae x hartmannii] x hartmannii