The orchid Dendrobium tetragonum-tetragonum giganteum 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 tetragonum (50.00%)  section: Dendrocoryne 
• Dendrobium tetragonum subsp. giganteum (50.00%)