]> GH barcode-01564460 United States of America Oklahoma Caddo Lake ca. 1.5 miles west of Witchita Mountains National Wildlife Refuge headquarters, R15W, T3N, Sec. 13 Potamogeton diversifolius Rafinesque Rafinesque 2020-03-16 20:35:43 C. B. Hellquist & C. E. Hellquist