This is the first comprehensive identification manual for aquatic and riparian weeds west of the Rocky Mountains. This practical, easy-to-use guide covers 171 aquatic plant species -- consisting of 58 plant groups, including a full description of 82 species and another 96 plants compared as similar species, representing 42 plant families. Lavishly illustrated with over 560 photographs and weighing in at 442 pages, this is a “must-have" reference and field manual for weed control specialists, land managers, water system managers, rice growers, golf course superintendents, and landscape professionals. Anyone interested in learning more about identification of important weeds of aquatic and riparian systems should make room on their bookshelf for this guide.