]> GH barcode-01564461 United States of America Oklahoma eastern end of Lake Rush, Witchia Mts. National Wildlife Refuge, ca. 7.0 miles NE. of Cache, Sec. 7, T3N, R13W Potamogeton diversifolius Rafinesque Rafinesque 2020-03-16 20:39:28 C. B. Hellquist & L. Crouch