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. Charlotte
= Marion x Fitzhart ( has 1 hybrid progeny ) registered: 6/01/1998 by Roper N.Species composition summary:
hartmannii 37.5% fitzgeraldii 37.5% olivaceus 25.%
Detailed composition:
Sarco. Charlotte = Marion x Fitzhart = [Fitzhart x olivaceus] x [hartmannii x fitzgeraldii]
Fitzhart = hartmannii x fitzgeraldii