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Myriophyllum spicatum L.
Eurasian watermilfoil

General Information
Symbol: MYSP2
Group: Dicot
Family: Haloragaceae
Duration: Perennial
Growth Habit: Forb/herb
Native Status: AK   I
L48   I
Other Common Names: spike watermilfoil
Plant Guide (pdf) (doc)
Data Source and Documentation
Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   


click on a thumbnail to view an image, or see all the Myriophyllum thumbnails at the Plants Gallery

©Robin R. Buckallew. United States, TX, Denton. Usage Requirements.

©Robin R. Buckallew. United States, TX, Lewisville. Usage Requirements.

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 2: 614. Provided by Kentucky Native Plant Society. Scanned by Omnitek Inc. Usage Requirements.

USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service. Provided by NRCS National Wetland Team. Usage Requirements.




Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Rosidae
Order Haloragales
Family Haloragaceae – Water Milfoil family
Genus Myriophyllum L. – watermilfoil
Species Myriophyllum spicatum L. – Eurasian watermilfoil

Subordinate Taxa

This plant has no children

Legal Status

Noxious Weed Information
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete noxious weed list for that location, or click here for a composite list of all Federal and State Noxious Weeds.
Eurasian watermilfoil
Class C noxious weed
Eurasian watermilfoil
B list (noxious weeds)
Eurasian watermilfoil
Invasive, banned
Eurasian watermilfoil
Prohibited aquatic plant, Class 1
Eurasian watermilfoil
Noxious weed
Eurasian water milfoil
Invasive aquatic plant
Eurasian or European water-milfoil, spike water-milfoil
Eurasian watermilfoil
Category 3 noxious weed
Eurasian water-milfoil
Noxious weed
New Mexico
Eurasian watermilfoil
Class A noxious weed
North Carolina
Eurasian watermilfoil
Class B noxious weed
Eurasian watermilfoil
"B" designated weed
Eurasian watermilfoil
South Carolina
Eurasian watermilfoil
Invasive aquatic plant
Eurasian watermilfoil
Plant pest
South Dakota
Eurasian water milfoil
Regulated non-native plant species
Eurasian watermilfoil
Noxious plant
Eurasian watermilfoil
Class B noxious weed
Eurasian watermilfoil
Class B noxious weed
Eurasian watermilfoil
Wetland and aquatic weed quarantine
U.S. Weed Information
Myriophyllum spicatum
Eurasian watermilfoil
myriophylle en epi
spiked water milfoil
This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of Weeds of the U.S.
STATE Assorted authors. State noxious weed lists for 46 states. State agriculture or natural resource departments.
Cal-IPC California Invasive Plant Council. 2006. California Invasive Plant Inventory. Cal-IPC Publication 2006-02 (1 February 2007). California Invasive Plant Council. Berkeley, California.
FLEPPC Florida Exotic Pest Plant Council. 1999. Invasive plant list. Florida Exotic Pest Plant Council. Florida.
SEEPPC Southeast Exotic Pest Plant Council. 1996. Invasive exotic pest plants in Tennessee (19 October 1999). Research Committee of the Tennessee Exotic Pest Plant Council. Tennessee.
WI Hoffman, R.and K. Kearns (eds.). 1997. Wisconsin manual of control recommendations for ecologically invasive plants. Wisconsin Dept. Natural Resources. Madison, Wisconsin.

Wetland Status

Interpreting Wetland Status

North America
Alaska OBL
Arid West OBL
Atlantic and Gulf Coastal Plain OBL
Eastern Mountains and Piedmont OBL
Great Plains OBL
Midwest OBL
Northcentral & Northeast OBL
Western Mountains, Valleys, and Coast OBL



Source Large Mammals Small Mammals Water Birds Terrestrial Birds
Quinlan Low Low


Source Large Mammals Small Mammals Water Birds Terrestrial Birds


Quinlan, S.E., and S. Cuccarese. 2004. Native Alaskan and exotic plants used by wildlife. Alaska Department of Fish and Game. Anchorage.

Description of Values

Value Class Food Cover
High Average 25-50% of diet Regular source of cover
Low 5-10% of diet Infrequently used as cover
Minor 2-5% of diet Sparsely used as cover
Moderate Average 10-25% of diet Occasional source of cover