]> GH barcode-02073361 United States of America Oklahoma Rock Creek ca. 1 1/2 miles east of Dougherty along the Dougherty-Nebo Road, R3E, T2S, Sec. 7 Ceratophyllum demersum Linnaeus Linnaeus 2021-10-12 15:19:39 C. B. Hellquist & J. Holt