"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--