About the Author

Robert H. Mohlenbrock taught botany at Southern Illinois University Carbondale for thirty-four years, obtaining the title of Distinguished Professor. After his retirement in 1990, he joined Biotic Consultants as a senior scientist teaching wetland identification classes in twenty-six states to date. Since 1984, he has been a monthly columnist for Natural History magazine. Among his forty-five books and more than five hundred publications are Macmillan’s Field Guide to North American Wildflowers, Field Guide to the U. S. National Forests, and Where Have All the Wildflowers Gone?