]> GH barcode-00022643 United States of America Michigan Stream between Lower Barnhart Lake and Lake Nettie on the south side of County Route 638, ca. 3 miles southeast of Millersburg, Case Township Potamogeton ×haynesii Hellquist & G. E. Crow Hellquist & G. E. Crow 2015-11-09 15:13:03 C. B. Hellquist & C. T. Philbrick