Book excerpt: A full-color, photographic field guide to all of the submergent and floating-leaf aquatic plants of the Upper Midwest region of the United States. Covers 150 species, including the difficult and often-ignored macro-algae of the Characeae family. Every species is shown in high-resolution photographs, and many species are shown both underwater and above-water. Inset photographs highlight important identifying characteristics such as flowers, fruits, stipules, leaf veins, etc.