Specimen Information

Myriophyllum spicatum
Myriophyllum spicatum
(Eurasian watermilfoil)
Plants
Exotic

Specimen ID1884045
GroupPlants
GenusMyriophyllum
Speciesspicatum
Common NameEurasian watermilfoil
StateWA
CountySan Juan
LocalitySan Juan Island, near northwest end of Trout Lake watershed restricted access, Town of Friday Harbor
Mapping AccuracyAccurate
HUC8 NameSan Juan Islands
HUC8 Number17110003
HUC10 NameSan Juan Island
HUC10 Number1711000305
HUC12 NameSan Juan Island
HUC12 Number171100030500
Map
Collection Day24
Collection Month6
Collection Year2024
Year AccuracyActual
Reference 1
Ref. Number:28185
Author:University of Washington
Date:2018
Title:University of Washington Herbarium (WTU)
Publisher:Consortium of Pacific Northwest Herbaria Specimen Database
Reference 2
Ref. Number:18815
Author:Olmstead, R., D.E. Giblin, and B. Legler.
Date:2013
Title:Consortium of Pacific Northwest Herbaria
Publisher:University of Washington Herbarium
Volume:2009
CommentsIn 0.5m deep water in pool at inlet of creek to lake; Shoot tips reddish
Record TypeSpecimen
Earliest Recordlocale
DisposalUniversity of Washington Herbarium
Museum Cat NumberWTU
Year ClassVegetative


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Citation information: U.S. Geological Survey. [2025]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [12/12/2025].

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