Myriophyllum spicatum

Eurasian watermilfoil

Collection Information for Myriophyllum spicatum

Results limited to All Great Lakes Drainages.
To see the collection list for the entire United States, click here.
 Results also available in (click to export table to spreadsheet)

(click table headers to sort)
Specimen IDStateCountyLocalityYearHUC NumberDrainage NameStatus
1730822ONT [No locality description provided]201904090006Upper Thames River 
1892753ONT [No locality description provided; coordinates obscured by collector]202504090007Lower Thames River 
1886837ONT [No locality description provided]201504200002St. Marys 
1890690ONT [No locality description provided]202504200002St. Marys 
1886901ONT [No locality description provided]201904200003Gordon Lake 
1888181ONT [No locality description provided]202404210003Sturgeon River 
1891041ONT [No locality description provided]202504210003Sturgeon River 
1891146ONT [No locality description provided]202504210003Sturgeon River 
1891148ONT [No locality description provided]202504210003Sturgeon River 
1888482ONT [No locality description provided]202404220004Nottawasaga River-Frontal Lake Huron 
1890275ONT [No locality description provided]202504220004Nottawasaga River-Frontal Lake Huron 
1890416ONT [No locality description provided]202504220004Nottawasaga River-Frontal Lake Huron 
1892885ONT [No locality description provided]202504220004Nottawasaga River-Frontal Lake Huron 
1707124ONT [No locality description provided]200604240002Lake Huron 
1709178ONT [No locality description provided]202204240002Lake Huron 
1889933ONT [No locality description provided]202504240002Lake Huron 
1890327ONT [No locality description provided]202504240002Lake Huron 
1740604ONT [No locality description provided]201504270201Scugog River 
1809020ONT [No locality description provided]201304270103Sixteen Mile Creek-Frontal Lake Ontario 
1809114ONT Lake Ontario201204280002Lake Ontario 
1809115ONT Lake Ontario201204280002Lake Ontario 
1809088ONT [No locality description provided]201104270107Napanee River-Frontal Lake Ontario 
1809031ONT [No locality description provided]201304280002Lake Ontario 
1809026ONT [No locality description provided]201304270102Jordan Harbour-Frontal Lake Ontario 
1809101ONT [No locality description provided]201204270102Jordan Harbour-Frontal Lake Ontario 
1886853ONT [No locality description provided]201804280002Lake Ontario 
1889763ONT [No locality description provided]202504270202Gull River 
1890206ONT [No locality description provided]202504270203Kawartha Lakes 
1890640ONT [No locality description provided]202504270205Trent River 
1890711ONT [No locality description provided]202504250001Cedar Creek-Frontal Lake Erie 
1890720ONT [No locality description provided]202504270201Scugog River 
1890722ONT [No locality description provided]202504270201Scugog River 
1890724ONT [No locality description provided]202504270201Scugog River 
1890725ONT [No locality description provided]202504270201Scugog River 
1890729ONT [No locality description provided]202504270201Scugog River 
1890730ONT [No locality description provided]202504270201Scugog River 
1890731ONT [No locality description provided]202504270201Scugog River 
1891095ONT [No locality description provided]202504240002Lake Huron 
1891098ONT [No locality description provided]202504260000Lake Erie 
1891380ONT [No locality description provided]202504270105Ganaraska River-Frontal Lake Ontario 
1891489ONT [No locality description provided]202504250004Upper Grand River 
1891510ONT [No locality description provided]202504240002Lake Huron 
1891562ONT [No locality description provided]202504270204Otonabee River 
1891592ONT [No locality description provided]202504280002Lake Ontario 
1891867ONT [No locality description provided]202504240002Lake Huron 
1891888ONT [No locality description provided]202504240002Lake Huron 
1892195ONT [No locality description provided]202504270201Scugog River 
1892312ONT [No locality description provided]202504240002Lake Huron 
1892346ONT [No locality description provided]202504270203Kawartha Lakes 
1892365ONT [No locality description provided]202504270201Scugog River 
1892370ONT [No locality description provided]202504270201Scugog River 
1892371ONT [No locality description provided]202504270201Scugog River 
1892375ONT [No locality description provided]202504270201Scugog River 
1892377ONT [No locality description provided]202504270201Scugog River 
1892378ONT [No locality description provided]202504270201Scugog River 
1892379ONT [No locality description provided]202504270201Scugog River 
1892381ONT [No locality description provided]202504270201Scugog River 
1892382ONT [No locality description provided]202504270201Scugog River 
1892383ONT [No locality description provided]202504270201Scugog River 
1892385ONT [No locality description provided]202504270201Scugog River 
1892398ONT [No locality description provided]202504270201Scugog River 
1892402ONT [No locality description provided]202504270201Scugog River 
1892403ONT [No locality description provided]202504270201Scugog River 
1892587ONT [No locality description provided]202504240002Lake Huron 
1892668ONT [No locality description provided]202504240002Lake Huron 
1892692ONT [No locality description provided]202504270204Otonabee River 
1892860ONT [No locality description provided]202504240002Lake Huron 

Citation for this information:
U.S. Geological Survey, 2025, Myriophyllum spicatum: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 12/17/2025