Ecological Risk Screening Summary - Vallisneria natans (an eelgrass, 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.

Vallisneria natans is an aquatic plant species native to East Asia (Japan, North Korea, South Korea, China, Taiwan, Hong Kong, Vietnam, and India) and Iraq. V. natans may be used in the ornamental or aquarium trade. It is also used as a medicinal plant in Vietnam. Vallisneria natans has not been reported outside of its native range, therefore no impacts of introduction have been reported. The history of invasiveness is classified as No Known Nonnative Population. The climate match for the contiguous United States is High, with high match primarily being found in the Midwest, central Great Plains, Mid-Atlantic, and Southeast regions of the country. The certainty of assessment is Low due to a lack of information. The overall risk assessment category for Vallisneria natans is Uncertain.