]> GH barcode-01746017 United States of America Michigan Center of Sect. 16. T37N R1W, Black River between its mouth and Alverno. Potamogeton pusillus subsp. tenuissimus (Mertens & Koch) R. R. Haynes & Hellquist (Mertens & Koch) R. R. Haynes & Hellquist 2021-02-16 14:31:44 R. R. Haynes