Claim: Ludwigia glandulosa, is an amphibious plant from southeast United States which includes the states that are south of the Mason-Dixon line, the Ohio River and as far west as Arkansas and Louisiana.
Evidence: Ludwigia glandulosa, the cylindricfruit primrose-willow, is an amphibious plant from southeast United States. Ludwigia glandulosa can be found in wetland areas and roadside ditches throughout most of the southern states in North America.