]> GH barcode-01564020 United States of America Oklahoma Spring Creek north of second dam above the jct. with Pennington Creek, 1 3/4 miles north of Reagan, NW 1/4, Sec. 19, T7S, R6E Potamogeton amplifolius Tuckerman Tuckerman 2020-03-05 16:41:27 C. B. Hellquist & L. Crouch