For Corallorhiza
Correll, D.S. 1950. Native orchids of North America north of Mexico. Chronica Botanica Cp., Waltham, MA. 399 pp.
Freudenstein, J.V. 1992. Systematics of Corallorhiza and the Corallorhizinae (Orchidaceae). Ph.D. dissertation, Cornell University, Ithaca, NY.
Freudenstein, J.V. 1997. A monograph of Corallorhiza (Orchidaceae). Harvard Papers in Botany 10: 5-51.
Freudenstein, J.V. 1999b. A new species of Corallorhiza (Orchidaceae) from West Virginia, U.S.A. Novon 9: 511-513.
Magrath, L.K., and J.V. Freudenstein. 2002. Corallorhiza. 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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