The orchid Dendrobium Gracillimum-kingianum is a hybrid . This orchid hybrid lacks official registration. The name is an internal designation created within the orchidroots system.
Top three species ancestors and their influences are

• Dendrobium kingianum (50.00%)  section: Dendrocoryne 
• Dendrobium gracilicaule (25.00%)  section: Dendrocoryne 
• Dendrobium speciosum (25.00%)