National Wetland Plant List database.
A national effort led by the U.S. Army Corps of Engineers to update the National Wetland Plant List (NWPL). Interest in wetland plants comes from all levels of government, academia, the private sector, and non-profit organizations. The NWPL (and the information implied by its wetland plant species status ratings) is used extensively in wetland delineation, wetland restoration and research, and the development of compensatory mitigation goals, as well as in providing general botanical information about wetland plants. (2014) U.S. Army Corps of Engineers National Wetland Plant List, version 3.2