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. Ivory= Star Delight x speciosum ( has 8 hybrid progeny ) registered: 1/01/1989 by Skillicorn W.
ANOS judging segment: Australian (Section Dendrocoryne )
Species composition summary:
Den. Ivory = Star Delight x speciosum = [Star of Gold x jonesii] x speciosum
Star of Gold = falcorostrum x tetragonum