]> GH barcode-01746136 United States of America Pennsylvania in pond at Whipple's Dam, Seven Mts. Potamogeton pusillus subsp. tenuissimus (Mertens & Koch) R. R. Haynes & Hellquist (Mertens & Koch) R. R. Haynes & Hellquist 2020-11-18 10:42:51 J. P. Kelly