]> GH barcode-01780171 United States of America Oklahoma on the south side of road ca. 0.2 mile east to entrance to Tishomingo Nat'l Wildlife Refuge off Rte. 99, ca. 1.0 mile south of the Washita River, south of Tishomingo, Sec. 17, T4S, R6E Ludwigia palustris (Linnaeus) Elliott (Linnaeus) Elliott 2020-05-08 15:21:10 C. B. Hellquist & L. Crouch