References

Pridgeon, A.M., R.M. Bateman, A.V. Cox, J.R. Hapeman, and M.W. Chase. 1997. Phylogenetics of subtribe Orchidinae (Orchidoideae, Orchidaceae) based on nuclear ITS sequences. 1. Intergeneric relationships and polyphyly of Orchis sensu lato. Lindleyana 12: 89-109. Google Scholar