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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

Click image to enlarge

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:


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.

Invasive Plants of Ohio: Fact Sheet 4 - Purple Loosestrife (PDF | 319 KB)
Ohio Invasive Plants Council.
Included as one of the worst invasive plant species in Ohio's natural areas; for others see Invasive Plants of Ohio.

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

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


Alaska Exotic Plants Information Clearinghouse: Species Biography - Purple Loosestrife and European Wand Loosestrife (Feb 8, 2011; PDF | 168 KB)
University of Alaska - Anchorage. Alaska Natural Heritage Program.

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.

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

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

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

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


Purple Loosestrife Project
California Department of Agriculture.

Encycloweedia: Data Sheet - Lythrum genus
California Department of Food and Agriculture.
Included on California's noxious weed list; see Encycloweedia: Program Details for additional resources.

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.

Invasive Plants in Pennsylvania: Purple Loosestrife (PDF | 128 KB)
Pennsylvania Department of Conservation and Natural Resources.

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

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.


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

Maine Invasive Plants Bulletin: Purple Loosestrife
University of Maine. Cooperative Extension.

Aquatic Invasive Species in the Chesapeake Bay - Purple Loosestrife (Sep 2013; 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 Invasive and Troublesome Weeds in North Dakota - Purple Loosestrife (PDF | 267 KB)
North Dakota State University. Extension Service.
A publication to help land managers properly identify and control noxious and invasive weeds found in the state. See Publication W1411 for entire publication, as well other species (reviewed and reprinted May 2015).

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.

Weed Identification - Purple Loosestrife
Montana Weed Control Association.

BioBullies - Purple Loosestrife
Natural Biodiversity (Western Pennsylvania).

Purple loosestrife
Plant Conservation Alliance. Alien Plant Working Group.

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: Nov 19, 2015
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