]> GH barcode-02073362 United States of America Oklahoma Rock creek ca. 1.5 miles east of Dougherty along the Dougherty-Nebo Road, Sec. 7, T2S, R3E Ceratophyllum demersum Linnaeus Linnaeus 2021-10-12 15:16:04 C. B. Hellquist & L. Crouch