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...
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Nature