Plants Profile for Myriophyllum heterophyllum (twoleaf watermilfoil)

General Information
Symbol:	MYHE2
Group:	Dicot
Family:	Haloragaceae
Duration:	Perennial
Growth Habit:	Forb/herb
Native Status:	CAN N L48 N
Data Source and Documentation

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	Native		Introduced		Both		Absent/Unreported
	Native, No County Data		Introduced, No County Data		Both, No County Data

Native Status:

L48

NAV

CAN

SPM

Images

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

Robert H. Mohlenbrock. USDA NRCS. 1995. Northeast wetland flora: Field office guide to plant species. Northeast National Technical Center, Chester. Provided by USDA NRCS Wetland Science Institute (WSI). 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: 616. 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.

Synonyms

Classification

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 heterophyllum Michx. – twoleaf watermilfoil

Subordinate Taxa

This plant has no children

Legal Status

Threatened and Endangered 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 protected plant list for that location.
Kentucky broadleaf water-milfoil Special Concern
Ohio two-leaved water-milfoil Endangered
Pennsylvania broad-leaved water-milfoil Endangered

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.
Connecticut variable-leaf watermilfoil Invasive, banned
Maine variable-leaf water milfoil Invasive aquatic plant
Massachusetts variable water-milfoil, two-leaved water-milfoil Prohibited
Vermont variable-leaved milfoil Class A noxious weed

U.S. Weed Information
Myriophyllum heterophyllum variable-leaved 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.

Wetland Status

Interpreting Wetland Status

North America
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