Species that are considered high risk have a well-documented history of invasiveness in at least one location globally, and a high or medium climate match to the contiguous United States.
Yellow floatingheart (Nymphoides peltata) is an aquatic plant native to Eurasia, Mediterranean, China, Japan and India. The history of invasiveness is high, it has been introduced to much of the world through multiple vectors including the aquatic plant trade, careless disposal, and flooded water gardens. N. peltata outcompetes native vegetation, congests waterways inhibiting navigation, and reduces biodiversity. Climate matching indicated the contiguous United States has a high climate match. There are already established N. peltata populations in much of the United States The certainty of assessment is high. The overall risk assessment category is high.