The orchid Dendrobium Dungog Sam is a hybrid registered with the Royal Horticultural Society by W.A.Perrin in 2020.
Top three species ancestors and their influences are

• Dendrobium speciosum (60.94%)
• Dendrobium bigibbum (12.50%)  section: Phalaenanthe 
• Dendrobium tetragonum (12.50%)  section: Dendrocoryne