Ecological Risk Screening Summary - Ludwigia perennis (a plant, no common name) - Uncertain Risk

Species that are considered uncertain risk need a more in-depth assessment beyond the Risk Summary to better define the species’ risk to U.S. environments.

Ludwigia perennis is an aquatic herb that grows in tropical and wet areas of Asia, Australia, Africa and the Middle East. L. perennis is used as medicine and its leaves as food in some of its native areas. It is unclear if the reported introductions in India, Sri Lanka, and Uzbekistan are within the native range of this species. The introduction to the Andaman Islands seems to be outside any description of the native range. The history of invasiveness category is Data Deficient for this species based on the reports of multiple introductions, with at least one resulting in an established population, but no evidence of negative impacts. The climate match for the contiguous United States is High, with high match generally being found along the United States and Mexico border, in the Southeast along the Gulf Coast, and in interior areas of the Pacific Coastal States. The certainty of assessment is Low due to a lack of information and uncertainty regarding the introduced populations. The overall risk assessment category for Ludwigia perennis is Uncertain.