]> GH barcode-01746008 United States of America Michigan small pond E of Twin Lakes ca. 9.7 km E of Alverno, SE 1/4, Sect. 2, T36N, R2E Potamogeton pusillus subsp. tenuissimus (Mertens & Koch) R. R. Haynes & Hellquist (Mertens & Koch) R. R. Haynes & Hellquist 2021-02-16 11:53:05 C. B. Hellquist & R. R. Haynes