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Potamogeton foliosus NRCS. en Potamogeton foliosus from Robert Mohlenbrock USDA NRCS Northeast wetland flora Field office guide to plant species Northeast National Technical Center Chester Courtesy of USDA NRCS Wetland Science Institute usda gov imageID pofoahp tif Robert Mohlenbrock Template PDUSGovUSDANRCS Potamogeton foliosus