Ecological Risk Screening Summary - Hydrothrix gardneri (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.

Hydrothrix gardneri is an aquatic plant endemic to the Caatinga biome in eastern Brazil. It appears in the aquarium trade only rarely. H. gardneri has not been reported as introduced outside its native range, so the history of invasiveness is classified as No Known Nonnative Population. The climate match to the contiguous United States was low overall, with medium matches limited to southern Florida, the southern tip of Louisiana, southern Texas, and southern coastal California. The certainty of the assessment is low due to the lack of introduction history for this species. The overall risk assessment category for H. gardneri is Uncertain.