]> GH barcode-01746016 United States of America Michigan Marl Bay, NW corner of Douglas Lake; Sect. 18, T37N, R3W ca. 14 mi SW of Cheboygan Potamogeton pusillus subsp. tenuissimus (Mertens & Koch) R. R. Haynes & Hellquist (Mertens & Koch) R. R. Haynes & Hellquist 2021-02-16 14:30:31 R. R. Haynes