The following sources were used to help in the identification of the flowers pictured on this site:

Haywood, Mary Joy, and Phyllis Testal Monk. Wildflowers of Pennsylvania. [Pittsburgh?]: Venture Graphics Inc., 2001. Print.

Newcomb, Lawrence. Newcomb’s Wildflower Guide. Boston – Toronto: Little, Brown and Company, 1977. Print.

Niering, William A., and Nancy C. Olmstead. National Audubon Society Field Guide to North American Wildflowers Eastern Region. New York: Alfred A. Knopf, 1979. Print.