]> GH barcode-02073357 United States of America Oklahoma pond on south side of road ca. 0.2 mile east of entrance to Tishomingo Natl. Wildlife Refuge, east of Rte. 99 ca. 1.0 mile south of Washita River, south of Tishomingo, Sec. 17, T4S, R6E Ceratophyllum demersum Linnaeus Linnaeus 2021-10-12 16:20:28 C. B. Hellquist & L. Crouch