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. Helen Lorraine= Yvette x Cherie ( has 2 hybrid progeny ) registered: 13/05/2015 by Western K. -Russell K.
Species composition summary:
Sarco. Helen Lorraine = Yvette x Cherie = [Cherie x Fitzhart] x [Fitzhart x fitzgeraldii]
Fitzhart = hartmannii x fitzgeraldii
Cherie = Fitzhart x fitzgeraldii = [hartmannii x fitzgeraldii] x fitzgeraldii