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.
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.
Correll, D.S. 1950. Native orchids of North America north of Mexico. Chronica Botanica Cp., Waltham, MA. 399 pp.
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.
Pridgeon, A.M., P.J. Cribb, M.W. Chase, and F.N. Rasmussen. 1999b. Genera orchidacearum. Volume 3: Orchidioideae (part 1). Oxford Univ. Press.
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.
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.
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