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. Cosmic Gold = Avril's Gold x speciosum Registration: 2009 by Butler D.F.
Cobber = Brimbank Cosmic Cobber 2018 Drobski, Michael
Dingadee = Dingadee Gold 2017 Perrin W.A.
Donovan = Cosmic Opal 2019 Anderson
Dunokayla = Brimbank Gold 2015 Drobski, Michael
Yondi Tina = Saigon Everest 2019 Kings Nursery