]> GH barcode-01688155 United States of America Michigan Black River ca. 1/2 mile S of Cheboygan River, ca. 2 1/2 mi NW of Alverno, Sect. 16, T37N, R3W Potamogeton haynesii Hellquist & Crow Hellquist & Crow 2021-02-11 16:32:23 C. B. Hellquist & R. R. Haynes