- Myriophyllum herterophyllum
- Common Names:
- Broadleaf watermilfoil, Various-leaved water-milfoil
- Freshwater ponds, lakes, canals, ditches, slow flowing rivers, estuaries, canals, reservoirs and marshes.
- Can grow on mudflats if water levels drop
- Submerged rooted evergreen fast-growing perennial plant. A popular plant in the aquarium and water gardening trades and can be readily obtained under a variety of names.
- Origin and Worldwide Distribution:
- Native to the Eastern United States, the broadleaf watermilfoil is a popular plant in the aquarium and water gardening trades and can be readily obtained under a variety of names.
- In Europe, the species has become established in the wild in Austria, Belgium, Germany, Spain, France, Hungary and the Netherlands.
- Potential or Known Impacts:
- The broadleaf watermilfoil poses a major threat to biodiversity because of its rampant growth and the formation of dense mats of submerged plant matter through the entire water depth and on the surface.
- The mats impede the water flow and reduce sunlight and oxygen availability, causing the loss of native species and significant alterations to the ecosystem.
- It affects all types of freshwater bodies, including wetlands.
- The risk of the plant spreading into other European countries is high.
- How did it/could it get here?
- It is a popular plant in the aquarium and water gardening trades and can be readily obtained under a variety of names.
- If already present in Ireland where?
- Not present in Ireland
- Methods for Prevention:
Current Legislative Position (Listed on 02 August 2017) This species must not intentionally be brought into the Union; kept; bred; transported to, from or within the United Kingdom, unless for the transportation to facilities in the context of eradication; placed on the market; used or exchanged; permitted to reproduce, grown or cultivated; or released into the environment. For further queries, you can contact the Non Native Invasive Species Team in the Northern Ireland Environment Agency on 028 9056 9558.