]> GH barcode-01695677 United States of America Michigan southern end of Duck Lake, Lake George, St. Mary's River at narrow portion between Duck Island and Sugar Island, Osborn Nature Preserve U. Mich, Sec. 26, T47N, R2E. Potamogeton pusillus Linnaeus Linnaeus 2021-02-16 06:31:43 C. B. Hellquist & C. T. Philbrick