To confirm the registration of an Australian native hybrid & view its composition/progeny: (Database as at 1st April 2018 RHS registrations)
For non-Australian Dendrobium hybrids use the Dendrobium Hybrids checklist here
Sarco. Galaxy= Misty x hartmannii ( has 19 hybrid progeny ) registered: 4/02/2008 by Butler D.F.
Sarco. Galaxy ‘Cream 2011’ AM/ANOS 2016 Photo W. Dobson
Species composition summary:
Sarco. Galaxy = Misty x hartmannii = [Aussie Dawn x Riverdene] x hartmannii
Riverdene = hartmannii x hirticalcar
Aussie Dawn = hartmannii x dilatatus