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. Amelia= Duno Nickys Twin x Velvet ( has 1 hybrid progeny ) registered: 16/11/2011 by Butler D.F.
Species composition summary:
Sarco. Amelia = Duno Nickys Twin x Velvet = [Nicky x Fitzhart] x [Nicky x Riverdene]
Riverdene = hartmannii x hirticalcar
Fitzhart = hartmannii x fitzgeraldii
Nicky = fitzgeraldii x hirticalcar