About National Wetland Plant List
The National Wetland Plant List (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. The NWPL covers all 50 U.S. states, the District of Columbia, and the U.S. Caribbean and Pacific islands that are considered to be territories of the U.S. However, to provide additional insights regarding plant distribution awareness, we have included the total geographic range for each taxon throughout North America north of Mexico. The wetland plant data are organized into ten regions that coincide with Corps wetland delineation regions.
For more information, see http://rsgisias.crrel.usace.army.mil/NWPL/
Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241.