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. Jeanne
= Weinhart x Fitzhart ( has 6 hybrid progeny ) registered: 19/10/1995 by Wilson KevinSpecies composition summary:
hartmannii 50.% fitzgeraldii 25.% weinthalii 25.%
Detailed composition:
Sarco. Jeanne = Weinhart x Fitzhart = [hartmannii x weinthalii] x [hartmannii x fitzgeraldii]