The orchid Disa Oak Valley is a hybrid registered with the Royal Horticultural Society by S.& M.Cywes in 1992.
Top three species ancestors and their influences are

• Disa uniflora (92.19%)  section: Disa 
• Disa tripetaloides (6.25%)  section: Disa 
• Disa racemosa (1.56%)  section: Disa