Myriophyllum spicatum
Myriophyllum spicatum
(Eurasian watermilfoil)
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17 results for Myriophyllum spicatum (Eurasian watermilfoil)
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Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
246179 ORColumbiaClatskanie Slough2003 17080003 Lower Columbia-Clatskaniecollected
242682 ORColumbiaClatskanie Slough - Beaver Slough and Beaver Dredge Cut2003 17080003 Lower Columbia-Clatskanieestablished
1847099 ORColumbiaColumbia River2021 17080003 Lower Columbia-Clatskanie 
237315 ORColumbiaColumbia River, lower2005 17080003 Lower Columbia-Clatskanieestablished
1760785 ORMultnomah[No locality description provided]1981 17080003 Lower Columbia-Clatskanie 
1762098 ORMultnomah[No locality description provided]1981 17080003 Lower Columbia-Clatskanie 
1762502 ORMultnomah[No locality description provided]1981 17080003 Lower Columbia-Clatskanie 
1762541 ORMultnomah[No locality description provided]1981 17080003 Lower Columbia-Clatskanie 
1671064 ORMultnomah[No locality description provided]2016 17080003 Lower Columbia-Clatskanie 
1847110 ORMultnomah[No locality description provided]2021 17080003 Lower Columbia-Clatskanie 
1763374 ORMultnomahBlue Lake2010 17080003 Lower Columbia-Clatskanie 
1760716 ORMultnomahBlue Lake2010 17080003 Lower Columbia-Clatskanie 
246176 ORMultnomahBlue Lake, 3 miles northwest of Troutdale1981 17080003 Lower Columbia-Clatskaniecollected
859078 ORMultnomahCamas1981 17080003 Lower Columbia-Clatskanieestablished
859071 ORMultnomahCamas1981 17080003 Lower Columbia-Clatskanieestablished
859041 ORMultnomahCamas1981 17080003 Lower Columbia-Clatskanieestablished
859085 ORMultnomahCamas1981 17080003 Lower Columbia-Clatskanieestablished

Data Disclaimer: Number of records does not imply species abundance. This summary represent collection records only and may not reflect the actual distribution of established populations. These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the U.S. Geological Survey (USGS) and are provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the data.

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Citation information: U.S. Geological Survey. [2026]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [1/16/2026].

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