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Gratiolaneglecta. en Gratiola neglecta from Robert Mohlenbrock USDA SCS Midwest wetland flora Field office illustrated guide to plant species Midwest National Technical Center Lincoln Courtesy of USDA NRCS Wetland Science Institute Cropped usda gov imageID grneavp tif Robert Mohlenbrock Template PDUSGovUSDANRCS PDUSGov Gratiola