Includes bibliographical references and indexes. Conservation Research Institute, Cedarburg, Wisconsin, The Forest Preserve District of Cook County, River Forest, Illinois, The Chicago Botanic Garden, with the support of Robin Tennant Colburn of the Negaunee Foundation, Glencoe, Illinois--title page. Maps on endpapers.

"This will be considered the most complete flora ever written for anyplace in the U.S. They have meticulously and accurately brought the status of vascular plants in the Chicago region up-to-date, while painstakingly recording an incredible array of interactions between the flora and other organisms, especially insects. The intricate pollination of some plants, many of these associations not previously known or recorded, is almost beyond belief."--Robert H. Mohlenbrock-- Introduction -- Synopsis of the flora -- Guide to the floristic and ecological synthesis -- Natural divisions -- Natural vegetation and plant communities -- Key to the families and sections -- Floristic and ecological synthesis -- Vegetative key to the oak galls -- Indices -- Abbreviations for nomenclatural authorities -- Glossary -- Literature cited -- End note -- Author and illustrator bios -- Colophon -- Maps -- Hybrid diagrams -- Tables -- Figures -- Plates 1-24 -- Miscellaneous images.