Claim: Ludwigia glandulosa, is an amphibious plant from southeast United States which includes the states that are south of the Mississippi River, the Ohio River and as far west as Arkansas and Louisiana.
Evidence: The Southeastern United States, also referred to as the American Southeast or simply the Southeast and sometimes simply the South, is, broadly, the eastern portion of the Southern United States and the southern portion of the Eastern United States. Expansively, it includes everything south of the Mason–Dixon line, the Ohio River, and the 36°30' parallel, and as far west as Arkansas and Louisiana. Ludwigia glandulosa, the cylindricfruit primrose-willow, is an amphibious plant from southeast United States.