]> GH barcode-01780175 United States of America Oklahoma at the headwaters of Spring Creek, 2.5 miles NE. of Reagan, SE 1/4 Sec. 18, T2S, R6E Ludwigia palustris (Linnaeus) Elliott (Linnaeus) Elliott 2020-05-08 15:39:00 C. B. Hellquist & L. Crouch