]> GH barcode-01746135 United States of America Pennsylvania farm pond on north side of road ca. 1/2 mile east of Inglesmith Potamogeton pusillus subsp. tenuissimus (Mertens & Koch) R. R. Haynes & Hellquist (Mertens & Koch) R. R. Haynes & Hellquist 2020-11-18 10:41:40 C. B. Hellquist