Works Cited

Chadde, Steve W. A Great Lakes Wetland Flora. Calumet: Pocketflora Press, 1998.

Eastman, John. The Book of Forest and Thicket: Trees, Shrubs, and Wildflowers of           Eastern North America. Harrisburg: Stackpole Books, 1992.

Levine, Carol. A Guide to Wildflowers in Winter. New Haven: Yale University Press,           1995.

Niering, William A. Wetlands. New York: Alfred A. Knopf, 1985.

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

Peterson, Roger Tory, and Margaret McKenny. A Field Guide to Wildflowers:           Northeastern and Northcentral North American. New York: Houghton Mifflin,           1968.

Smith, Norman F. Trees of Michigan and The Upper Great Lakes. Lansing: Thunder Bay           Press, 1952.