is a comprehensive field guide to over 500 vascular plant species found in the wetland and aquatic habitats of North Dakota, South Dakota, Nebraska, and Great Plains portions of Montana and Wyoming. Based on the the ground-breaking 1993 publication by Gary E. Larson, this new field guide is fully illustrated with color photographs, distribution maps, and updated to reflect current taxonomic nomenclature and family assignments. Also included are keys, a glossary, and index.