About Myriophyllum heterophyllum Michx.
Myriophyllum heterophyllum Michx. has two common English names: twoleaf watermilfoil and broadleaf watermilfoil. It is a popular plant for aquariums and garden ponds. This species is often misidentified or overlooked, due to challenges in predicting its infestations and dispersal. In Europe, it is frequently mistaken for Myriophyllum verticillatum. In North America, it is often confused with M. hippuroides, M. laxum, or M. pinnatum, because all these species have similar vegetation. Myriophyllum heterophyllum is native to eastern United States and eastern Canada. Within the European Union, it has been recorded in Austria, Belgium, Germany, Spain, France, Hungary, Sweden, and the Netherlands. Citizen science observations indicate that it may also occur in western United States and Central America.
