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. Charm= Bernice Klein x Fitzhart ( has 5 hybrid progeny ) registered: 10/07/2008 by Butler D.F.
Species composition summary:
Sarco. Charm = Bernice Klein x Fitzhart = [Heartlight x fitzgeraldii] x [hartmannii x fitzgeraldii]
Heartlight = Pinkhart x hartmannii = [Lois x hartmannii] x hartmannii
Lois = ceciliae x hartmannii