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You are here: Home / Aquatic Species / Species Profiles / Purple Loosestrife
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Purple Loosestrife

Purple LoosestrifeScientific name: Lythrum salicaria L. (ITIS)

Common names: Purple loosestrife, spiked loosestrife

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Selected Resources

Native To: Eurasia (Munger 2002)

Date of U.S. Introduction: Exact date unknown; was established by the 1830s (Munger 2002)

Means of Introduction: Through ships' ballast and as an ornamental (Munger 2002)

Impact: Crowds out native species (Munger 2002)

Current U.S. Distribution:



Selected Resources:


Fact Sheet: Purple Loosestrife (Jan 2014; PDF | 986 KB)
Alberta Invasive Plants Council (Canada).

Invasive Plants of California's Wildlands - Lythrum salicaria
California Invasive Plant Council.
Bossard, C.C., J.M. Randall, and M.C. Hoshovsky (Editors). 2000. Invasive Plants of California's Wildlands. University of California Press. Berkeley, CA

Southeast Exotic Pest Plant Council Invasive Plant Manual - Purple Loosestrife
Southeast Exotic Pest Plant Council.


Invasive Plant Atlas of New England (IPANE) - Purple Loosestrife
University of Georgia. Center for Invasive Species and Ecosystem Health.

Invasive Plant Atlas of the United States - Purple Loosestrife
University of Georgia. Center for Invasive Species and Ecosystem Health.

Texas Invasives Database - Lythrum salicaria

Invasive Species Compendium - Lythrum salicaria
CAB International.

Global Invasive Species Database - Lythrum salicaria (aquatic plant, herb)
World Conservation Union. Invasive Species Specialist Group.


Lythrum salicaria L. (Purple Loosestrife) - Aquatic Plant Information System (APIS)
DOD. USACE. Engineer Research and Development Center. Environmental Laboratory.

Germplasm Resources Information Network (GRIN) - Lythrum salicaria
USDA. ARS. National Genetic Resources Program.

Purple Loosestrife - Biological Control of Invasive Plants in the Eastern United States (Aug 2002)
Published by: USDA. Forest Service. Publication FHTET-2002-04.

Lythrum salicaria - Fire Effects Information System (FEIS)
USDA. FS. Rocky Mountain Research Station. Fire Sciences Laboratory.

Managing Purple Loosestrife (2007; PDF | 791 KB)
USDA. NRCS. Conservation Reserve Enhancement Program; Pennsylvania State University.

PLANTS Database - Purple Loosestrife
USDA. NRCS. National Plant Data Center.

Lythrum salicaria - Species Abstracts of Highly Disruptive Exotic Plants at Effigy Mounds National Monument
DOI. Northern Prairie Wildlife Research Center.

Spread, Impact, and Control of Purple Loosestrife (Lythrum salicaria) in North American Wetlands
DOI. Northern Prairie Wildlife Research Center.

Purple Loosestrife - Guide to Weeds in British Columbia
British Columbia Ministry of Agriculture Food and Fisheries (Canada).


Purple Loosestrife Project
California Department of Agriculture.

Lythrum genus - EncycloWeedia
California Department of Food and Agriculture.

Purple Loosestrife
Colorado Department of Agriculture. Noxious Weed Management Program.

Purple Loosestrife - Vegetation Management Manual
Illinois Nature Preserves Commission.

Purple Loosestrife - Invasive and Exotic Species of Maryland
Maryland Department of Natural Resources. Wildlife and Heritage Service.

Purple Loosestrife - Missouri Vegetation Management Manual
Missouri Department of Conservation.

Purple Loosestrife Management Program
Minnesota Department of Natural Resources. Ecological Services Division.

Purple Loosestrife: An Exotic Menace - Environmental Fact Sheet (2010; PDF | 1.61 MB)
New Hampshire Department of Environmental Services.

Purple Loosestrife and Purple Loosestrife Fact Sheet (PDF | 95 KB)
Vermont Agency of Natural Resources. Environmental Conservation.

Purple Loosestrife - Invasive Alien Plant Species of Virginia (PDF | 144 KB)
Virginia Department of Conservation and Recreation. Natural Heritage Program; Virginia Native Plant Society.

Purple Loosestrife - Non-Native Freshwater Plants
Washington State Department of Ecology. Water Quality Program.

Class B Noxious Weed: Purple Loosestrife
Washington State Noxious Weed Control Board.

Purple Loosestrife
Wisconsin Department of Natural Resources.


Purple loosestrife and European wand loosestrife - Invasive Plant Species of Alaska (PDF | 168 KB)
University of Alaska - Anchorage. Alaska Natural Heritage Program.

Aquatic Invaders: Purple Loosestrife - Aquatic Invader Toolkit (PDF | 585 KB)
Illinois-Indiana Sea Grant.

Purple Loosestrife - Maine Invasive Plants Bulletin no. 2508
University of Maine. Cooperative Extension.

Purple Loosestrife - Aquatic Invasive Species in the Chesapeake Bay (PDF | 115 KB)
Maryland Sea Grant.

Purple Loosestrife: What You Should Know, What You Can Do
Minnesota Sea Grant.

Invasive Plant Atlas of the MidSouth - Purple Loosestrife
Mississippi State University. GeoResources Institute.

Purple Loosestrife - Noxious Weeds of Nebraska (PDF | 642 KB)
University of Nebraska - Lincoln. Cooperative Extension.

Introduced Species Summary Project - Purple loosestrife
(New York) Columbia University. Center for Environmental Research and Conservation.

Identification and Control of Purple Loosestrife (PDF | 137 KB)
North Dakota State University. Extension Service.

Ohio Perennial & Biennial Weed Guide - Purple Loosestrife
Ohio State University. Ohio Agricultural Research and Development Center.

Purple Loosestrife (PDF | 189 KB)
University of Pennsylvania. Morris Arboretum.


Purple Loosestrife
Colorado Weed Management Association.

Purple Loosestrife
Montana Weed Control Association.

BioBullies - Purple Loosestrife
Natural Biodiversity (Western Pennsylvania).

Purple loosestrife
Plant Conservation Alliance. Alien Plant Working Group.

Purple loosestrife - Practical Guidebook to the Control of Invasive and Aquatic Wetland Plants of the San Francisco Bay-Delta Region
San Francisco Estuary Institute.

Purple Loosestrife
Ontario Federation of Anglers and Hunters (Canada).


Integrated Taxonomic Information System. Lythrum salicaria. [Accessed Sep 10, 2014].

Munger, G. T. 2002. Lythrum salicaria. In: Fire Effects Information System. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory.

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Last Modified: Mar 20, 2015
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