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.
Myriophyllum pinnatum is a freshwater aquatic plant that grows in shallow waters in North and Central America (United States, Mexico, Jamaica, and Cuba). M. pinnatum is widely available online and in stores as it is used in aquariums. M. pinnatum has been reported outside of its native distribution (Mexico, Jamaica and Cuba), however there is no reporting on impacts of introductions, resulting in a history of invasiveness classification of Data Deficient. M. pinnatum was not found to be listed on any international, Federal, or State invasive/prohibited or restricted lists. It is listed as threatened or endangered in parts of its native rage in the United States. The climate match for the contiguous United States is high. The majority of the central and eastern United States has a high match. There was one main are of low match in the southwestern deserts. The certainty of assessment is classified as Low due to a lack of information. The overall risk assessment category for Myriophyllum pinnatum is Uncertain.
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Uncertain Risk
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