References

For Calopogon

Correll, D.S. 1950. Native orchids of North America north of Mexico. Chronica Botanica Cp., Waltham, MA. 399 pp. Google Scholar

Goldman, D.H., C. van den Berg, and M.P. Griffith. 2004. Morphometric circumscription of species and infraspecific taxa in Calopogon R. Br. (Orchidaceae). Plant Syst. Evol. 247: 37-60. Google Scholar

Goldman, D.H., L.K. Magrath, amd P.M. Catling. 2002. Calopogon. 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

Goldman, D.H., R.K. Jansen, C. van den Berg, I.J. Leitch, M.F. Fay, and M.W. Chase. 2004. Molecular and cytological examination of Calopogon (Orchidaceae, Epidendroideae): circumscription, phylogeny, polyploidy and potential hybrid speciation. Amer. J. Bot. 91: 707-723. Google Scholar

Trapnell D.W., J.L. Hamrick, and D.E. Giannasi. 2004. Genetic variation and species boundaries in Calopogon (Orchidaceae). Syst. Bot. 29: 308-315. Google Scholar