To confirm the registration of a Dendrobium hybrid & view its composition/progeny: (Database as at 1 January 2018 RHS registrations)
Den. Dal's Hope = Rak Doreen x White Wine Registration: 1994 by Littman D. & B.
Burdekin Crystal = Dal's Chief 1998 Littman D. & B.
Dal's Queen = Dal's Harmony 1998 Littman D. & B.