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
Den. Essie Banks
= Hilda Poxon x speciosum ( has 4 hybrid progeny ) registered: 1/01/1983 by Banks, DavidANOS judging segment: Australian (Section Dendrocoryne )
Species composition summary:
speciosum 75.% tetragonum 25.%
Detailed composition:
Den. Essie Banks = Hilda Poxon x speciosum = [speciosum x tetragonum] x speciosum