]> GH barcode-01572856 United States of America Michigan southeastern portion of Twin Lakes near the Twin Lakes campground, ca. 9.7 km SE of Alverno, Sect. 2, T36N, R2E Potamogeton gramineus Linnaeus Linnaeus 2021-02-11 08:48:18 C. B. Hellquist & R. R. Haynes