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A Field Guide to the National Wetland Plant List is an up-to-date reference to the wetland indicator status ratings for nearly 7,000 plant species of the United States, and will be useful to anyone conducting wetland delineation studies or performing ecological research in wetland habitats. The ratings indicate a species? likely presence or absence in wetlands in one of five categories: ? Obligate Wetland Plants (OBL) ? Facultative Wetland Plants (FACW) ? Facultative Plants (FAC) ? Facultative Upland Plants (FACU) and ? Upland Plants (UPL). The Guide incorporates the 2012 version of the National Wetland Plant List (NWPL) which refined the earlier ratings. Also, the new ratings are based on the plant?s wetland status within broad ecological regions, eight of which are included in the Guide:
Eastern United States
? AGCP Atlantic and Gulf Coastal Plain ? EMP Eastern Mountains and Piedmont ? MW Midwest ? NCNE Northcentral and Northeast
Western United States
? AK Alaska ? AW Arid West ? GP Great Plains ? WMVC Western Mountains, Valleys and Coast
The eight included regions cover the lower 48 states and Alaska; excluded from this Guide are wetland ratings for plants of Hawaii, the Pacific Islands, and the Caribbean region.
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