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.
Echinodorus horizontalis is an aquatic plant native to tropical South America in Brazil, Peru, Ecuador, Colombia, Venezuela, and Guyana. This species is found in the aquarium trade in the United States. It has also been used in traditional medicines. E. horizontalis has not been reported outside of its native range in the wild, therefore no impacts of introduction are available. The history of invasiveness is classified as No Known Nonnative Population. The overall climate match for the contiguous United States was Low, with low match found throughout the country, with the exception of Florida, and a small part of the Texas coast and the Puget Sound, which had a medium match. Limited information was available on the biology, ecology and impacts of introduction, therefore the certainty of assessment is Low. The overall risk assessment category for Echinodorus horizontalis is Uncertain.
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Uncertain Risk
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