@article {7496, title = {Myriophyllum heterophyllum, een nieuwe invasieve waterplant}, journal = {Dumortiera}, volume = {94}, year = {2008}, month = {2008///}, pages = {8 - 13}, abstract = {Myriophyllum heterophyllum, a new aquatic invasive exotic species. In the Anti-tank Ditch ({\textquoteright}Antitankgracht{\textquoteright}) north-east of Antwerp a large population of Myriophyllum heterophyllum Michaux was discovered. Further research indicated this species is present at other locations in the province of Antwerp. Vegetative differences with native species of Myriophyllum are discussed.Myriophyllum heterophyllum, une nouvelle plante aquatique invasive. Dans le canal d{\'e}fensif appel{\'e} {\textquoteright}Antitankgracht{\textquoteright}, au nord-est d{\textquoteright}Anvers, une vaste population de Myriophyllum heterophyllum Michaux a {\'e}t{\'e} d{\'e}couverte. L{\textquoteright}esp{\`e}ce se rencontre aussi en d{\textquoteright}autres endroits dans la province d{\textquoteright}Anvers. Les caract{\`e}res v{\'e}g{\'e}tatifs qui la distinguent des autres esp{\`e}ces indig{\`e}nes de Myriophyllum sont discut{\'e}s.}, author = {Beer, Dirk De and Vlaeminck, Rembrandt De} }