- Perennial aquatic plant submerged and visible on the surface of the water.
- Whorls composed of three to six leaves, feather-like appearance.
- Leaves divided and composed of twelve to twentyfour pairs of leaflets, the end of which appears to be truncated.
- Flowers in spikes on the emergent stems, very red buds (flowering in July).
- Can be distinguished from native water milfoil species by its tendency to have leaves grouped much closer together, by the presence of soft leaves that are out of water and by its higher abundancy of leaflets.
- A particularly strong stem that reproduces quickly, which can make swimming and aquatic recreational activities extremely unpleasant or even perilous
A single small fragment is enough for a new colony of Eurasian water-milfoil to invade a lake.
If you think you observed an invasive alien specie, please contact us.