]> GH barcode-01746137 United States of America Pennsylvania in Whipple's Dam, 3 1/2 mi NW of McAlevy's Fort Potamogeton pusillus subsp. tenuissimus (Mertens & Koch) R. R. Haynes & Hellquist (Mertens & Koch) R. R. Haynes & Hellquist 2020-11-18 10:43:53 H. A. Wahl