]> GH barcode-01572851 United States of America Michigan northern end of Monroe Lake 4.8 km west of Weadock, Munro Township, SW 1/4 Sect. 4, T37N, R3W Potamogeton gramineus Linnaeus Linnaeus 2021-02-11 13:42:29 C. B. Hellquist & R. R. Haynes