Aquatic plants are the dominant plant group of the Middle Paraná river floodplain. Its communities are considered one of the most productive in the planet and fulfill important ecological functions in regional wetlands. Aquatic Plants of the Middle Parana River summarizes information on over than 120 plant species registered in a variety of floodplain habitats. It contains plant photos and illustrations, a brief description of each species, information about the habitats where aquatic plants commonly growth, main uses by human, and other data of interest. The book was organized to facilitate the identification of the species in field and can be useful for both specialists and students as well as for everyone interested in this fascinating group of plants.