]> GH barcode-00449861 United States of America Michigan stream between Lower Barnhart Lake and Lake Nettie, south of Rte. 638, ca. 3.0 miles SE. of Millersburg, Sec. 19, T34N, R3E Potamogeton friesii Ruprecht Ruprecht 2021-02-11 08:07:12 C. B. Hellquist & R. R. Haynes