Since its publication in 1979, Classification of Wetlands and Deepwater Habitats of the United States has been used in the National Inventory of Wetlands conducted by the U.S. Fish and Wildlife service. The system has been widely used throughout the U.S. and is often cited in the scientific literature. There has also been considerable international interest in use of the classification. This reprint allows for the opportunity to correct a number of minor typographical errors, bring plant names into conformity with the National List of Scientific Plant Names (U.S. Dept. Agriculture, 1982) and to upgrade the quality of plates as well as furnish additional plates. No changes have been made that either alter the structure of the classification or the meaning of the definitions.