Correll, D. S. 1., Ames, B. 1., Dillon, G. W. 1., Wherry, E. T. 1., Watkins, J. V., & Schweinfurth, C. 1. (1950). Native orchids of North America north of Mexico. Waltham, Mass., U.S.A;: Chronica Botanica Company.

Correll, Donovan Stewart 1908-1983, Blanche 1878-1969 Ames, Gordon Winston 1912-1982 Dillon, Edgar Theodore 1885-1982 Wherry, John Vertrees Watkins, and Charles 1890-1970 Schweinfurth. Native Orchids of North America North of Mexico. Waltham, Mass., U.S.A;: Chronica Botanica Company, 1950.

Correll, Donovan Stewart 1908-1983, et al. Native Orchids of North America North of Mexico. Waltham, Mass., U.S.A;: Chronica Botanica Company, 1950.