Reference Materials
Bouseman, John K., & James G. Sternberg (2001) Field Guide to Butterflies of Illinois, Manual 9. Illinois Natural History Survey: Champaign, IL.
Britton, N.L., & Addison Brown (1913/1970) An Illustrated Flora of the Northern United States and Canada, Vol. I-III. Dover: New York.
Covell, Charles Jr. (1984) Peterson Field Guide to Eastern Moths. Houghton Mifflin: New York.
Curtis, John T. (1959/1987) The Vegetation of Wisconsin. University of Wisconsin Press: Madison, WI.
Evers, Robert A. (1954) "Hill prairies of Illinois." Illinois Natural History Survey Bulletin, pp. 367-443.
Gleason, H.A. (1910) "The vegetation of the inland sand deposits of Illinois." Bulletin of Illinois State Laboratory of Natural History, pp. 140-170.
Hilty, John A. (2002) Flower-Visiting Insect Database. Database, Urbana, IL: http://www.shout.net/~jhilty/index.htm
Iverson, L., D. Ketner, & J. Karners (1999) Illinois Plant Information Network. Database, Illinois Natural History Survey & USDA Forest Service: http://www.fs.fed.us/ne/delaware/ilpin/ilpin.html
Jones, Almut G. (1989) "Aster and Brachyactis in Illinois." Illinois Natural History Survey Bulletin, Vol. 34(2), 139-194.
Jones, Almut G., & David T. Bell (1974) Vascular Plants of the Sangamon River Basin: Annotated Checklist and Ecological Summary. Bulletin 746, Agricultural Experiment Station, University of Illinois at Urbana-Champaign.
Jones, George N., & George D. Fuller (1955) Vascular Plants of Illinois. Univ. of Illinois Press & Illinois State Museum: Urbana & Springfield, IL.Ladd, Doug, & Frank Oberle (1995) Tallgrass Prairie Wildflowers: A Field Guide. Falcon Press: Helena, MT.
Martin, Alexander C., Herbert S. Zim, & Arnold Nelson (1951/1961) American Wildlife and Plants: A Guide to Wildlife Food Habits. Dover: New York.
Mohlenbrock, Robert H. (1999) Sedges: Carex. Southern Illinois Univ. Press: Carbondale & Edwardsville, IL.
Mohlenbrock, Robert H. (2001) Flowering Plants: Pokeweeds, Four-O'Clocks, Carpetweeds, Cacti, Purslanes, Goosefoots, Pigweeds, and Pinks. Southern Illinois Univ. Press: Carbondale & Edwardsville, IL.
Mohlenbrock, Robert H. (2002) Vascular Flora of Illinois. Southern Illinois Univ. Press: Carbondale & Edwardsville, IL.Opler, Paul A., & Vichai Malikul (1992/1998) Peterson Field Guide to Eastern Butterflies. Houghton Mifflin: New York.
Owensby, Clenton E. (1980) Kansas Prairie Wildflowers. Iowa State Univ. Press: Ames, IA.Panzer, R. (2000) Midewin Land and Resource Management Plan, Appendix A.
Robertson, Charles (1929) Flowers and Insects. The Science Press: Lancaster, PA.
Schwegman, John, Edward Hoffman, Robert Lee, Marlin Bowles, & Robert Schanzle (1978) Technical Report: Illinois Natural Areas Inventory. Illinois Dept. of Conservation: Springfield, IL.
Yatskievych, Kay (2000) Field Guide to Indiana Wildflowers. Indiana Univ. Press: Bloomington, IN.