References
For Dactylorhiza
Bateman, R.M., A.M. Pridgeon, and M.W. Chase. 1997. Phylogenetics of subtribe Orchidinae (Orchidoideae, Orchidaceae) based on nuclear ITS sequences. 2. Infrageneric relationships and reclassification to achieve monophyly of Orchis sensu stricto. Lindleyana 12: 113-141. Google Scholar
Bateman, R.M., and P.J. Rudall. 2018. Clarified relationship between Dactylorhiza viridis and Dactylorhiza iberica renders obsolete the former genus Coeloglossum (Orchidaceae: Orchidinae). Kew Bull. 73:4. Google Scholar
Correll, D.S. 1950. Native orchids of North America north of Mexico. Chronica Botanica Cp., Waltham, MA. 399 pp. Google Scholar
Inda, L.A., M. Pimentel, and M.W. Chase. 2010. Chalcone synthase variation and phylogenetic relationships in Dactylorhiza (Orchidaceae). Bot. J. Linn. Soc. 163(2): 155-165. Google Scholar
Pridgeon, A.M., P.J. Cribb, M.W. Chase, and F.N. Rasmussen. 1999b. Genera orchidacearum. Volume 3: Orchidioideae (part 1). Oxford Univ. Press. Google Scholar
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
Sheviak, C.J., and P.M. Catling. 2002c. Coeloglossum. In Flora of North America Editorial Committee. 2002a. Flora of North America north of Mexico. Volume 26, Magnoliophyta: Liliidae: Liliales and Orchidales. Oxford Univ. Press, New York, NY. 723 pp. Google Scholar