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
Sarco. Blanche
= Sweetheart x Cenedra registered: 31/10/2013 by Roper N.Species composition summary:
hartmannii 57.8% fitzgeraldii 37.5% falcatus 3.1% ceciliae 1.6%
Detailed composition:
Sarco. Blanche = Sweetheart x Cenedra = [Fitzhart x Heidi] x [Dove x Fairy]
Fairy = Highton Magic x Fitzhart = [Pinkhart x fitzgeraldii] x [hartmannii x fitzgeraldii]
Heidi = Fitzhart x hartmannii = [hartmannii x fitzgeraldii] x hartmannii
Dove = Melody x hartmannii = [Melba x fitzgeraldii] x hartmannii
Fitzhart = hartmannii x fitzgeraldii
Pinkhart = Lois x hartmannii = [ceciliae x hartmannii] x hartmannii
Melba = hartmannii x falcatus