Keywords: Plantago cordata NRCS-2.jpg en Plantago cordata Lam - heartleaf plantain 1989 http //plants usda gov/gallery/pubs/plco2_003_php jpg USDA-NRCS PLANTS Database / USDA SCS 1989 Midwest wetland flora Field office illustrated guide to plant species Midwest National Technical Center Lincoln Steve Olson USDA SCS 1989 Midwest wetland flora Field office illustrated guide to plant species Midwest National Technical Center Lincoln Courtesy of USDA NRCS Wetland Science Institute PD-USGov Uploaded with UploadWizard Plantago cordata |