Bentley, Stanley. Native Orchids of the Southern Appalachian Mountains. Chapel Hill, NC: University of North Carolina Press, 2000.

Butcher, Devereux. "Great Smoky Mountains." In Exploring Our National Parks and Monuments, 85-89. Boulder, Colo.: Robert Rinehart Publishers, 1995.

Butcher, Devereux. "Great Smoky Mountains." In Exploring Our National Parks and Monuments, 91-97. Harvard, Mass.: The Harvard Common Press, 1985.

Butcher, Devereux. "Great Smoky Mountains." In Exploring Our National Parks and Monuments, 63-69. Boston, Mass.: Gambit, 1976.

Butcher, Devereux. "Great Smoky Mountains." In Exploring Our National Parks and Monuments, 61-67. Boston, Mass.: Houghton Mifflin Co., 1969.