Keywords: Isoetes lacustris.jpg en Isoetes lacustris 2013-04-26 18 55 04 http //plants usda gov/java/profile symbol ISLA W Carl Taylor USDA NRCS 1992 Western wetland flora Field office guide to plant species West Region Sacramento Courtesy of USDA NRCS Wetland Science Institute PD-USGov Uploaded with UploadWizard Isoetes lacustris |