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Brazilian Elodea (waterweed) – NOT YET IN REGION

Photo by Robert Vidéki, Doronicum Kft., Bugwood.org

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Common Name: Brazilian elodea (waterweed)
Scientific Name: Egeria densa Planchon
Origin: South America


Brazilian elodea is a submerged perennial that looks similar to American waterweed (Elodea canadensis), a common native aquatic plant. Brazilian elodea has finely toothed leaves that are bright green, bushy, and usually arranged in whorls of four around the stem. The plant has round stems that can grow in water up to 20 feet deep and often branches near the surface. It reproduces via plant fragmentation.


Brazilian elodea grows in lakes, rivers, and springs and is found in both still and flowing waters. It is commonly sold as an aquarium plant.


This plant forms dense monotypic stands that can cover hundreds of acres and can persist until the fall. Mats can displace native vegetation, restrict water movement, and interfere with recreational uses.


Control of this plant is very difficult and costly. Studies show that Brazilian elodea can outcompete Eurasian watermilfoil. Prevention is the most effective control!

Distribution: View Map


Not yet in region.

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