Keywords: Isoetes echinospora NRCS-1.png en Isoetes echinospora Durieu 1861 - Spiny-spore quillwort fr Isoetes echinospora Durieu 1861 - Isoète à spores épineuses 1992 http //plants usda gov/java/largeImage imageID isec_001_ahp tif W Carl Taylor USDA-NRCS PLANTS Database / USDA NRCS 1992 Western wetland flora Field office guide to plant species West Region Sacramento 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 echinospora |