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You are here: Home / Aquatic Species / Species Profiles / Water Lettuce
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Water Lettuce

Water lettuce - Invasive.orgScientific name: Pistia stratiotes L. Royle (ITIS)

Common names: Water lettuce, tropical duckweed

Click image to enlarge

Selected Resources

Native To: Unknown, possibly South America, Africa, or the U.S. (Dray et al. 1988)

Date of U.S. Introduction: First described in Florida in 1765; experts disagree as to whether water lettuce is native to the U.S. (Ramey 2001)

Means of Introduction: Unknown (possibly native to the U.S., or it may have arrived in ballast water) (Ramey 2001)

Impact: Grows into dense mats that clog waterways (Ramey 2001)

Current U.S. Distribution: Southern U.S., Eastern U.S.

Images:

Video:

  • Water Lettuce (or select Play button below)
    University of Florida. Center for Aquatic and Invasive Plants. (YouTube).

Selected Resources:

Partnership

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

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

Texas Invasives Database - Pistia stratiotes
TexasInvasives.org.

Invasive Species Compendium - Pistia stratiotes
CAB International.

Pistia stratiotes: Water lettuce
European and Mediterranean Plant Protection Organization.

Global Invasive Species Database - Pistia stratiotes (aquatic plant)
World Conservation Union. Invasive Species Specialist Group.

Government

Pistia stratiotes L. (Waterlettuce) - Aquatic Plant Information System (APIS)
DOD. USACE. Engineer Research and Development Center. Environmental Laboratory.

Germplasm Resources Information Network (GRIN) - Pistia stratiotes
USDA. ARS. National Genetic Resources Program.

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

PLANTS Database - Water Lettuce
USDA. NRCS. National Plant Data Center.

Weed Profile: Water lettuce
New South Wales Department of Primary Industries (Australia).

Water lettuce
Queensland Department of Primary Industries and Fisheries (Australia).

State

Weed Alert: Water-lettuce (PDF | 408 KB)
Florida Department of Environmental Protection. Bureau of Invasive Plant Management.

Water-lettuce: Pistia stratiotes
Florida Fish and Wildlife Conservation Commission.

Invasive Plants in Pennsylvania: Water Lettuce (PDF | 376 KB)
Pennsylvania Department of Conservation and Natural Resources.

Water Lettuce
Wisconsin Department of Natural Resources.

Academic

Pistia stratiotes
University of Florida. IFAS. Center for Aquatic and Invasive Plants.

Water Lettuce - Aquaplant
Texas A&M University. Texas Agricultural Extension Service.

Professional

Pistia stratiotes (Water Lettuce)
East African Network for Taxonomy.

Water lettuce
Guide to Invasive Plants of the Galveston Bay Area.

Pistia stratiotes
Pacific Island Ecosystems at Risk.

Citations

Dray, F.A., C.R. Thompson, D.H Habeck, J.K. Balciunas, and T.D. Center. 1988. A survey of the fauna associated with Pistia stratiotes L. (waterlettuce) in Florida (PDF | 2.52 MB) U.S. Army Corps of Engineers Aquatic Plant Control Research Program. Technical Report A-88-6.

Integrated Taxonomic Information System. Pistia stratiotes. [Accessed Sep 10, 2014].

Ramey, V. 2001. Water lettuce. University of Florida Center for Aquatic and Invasive Plants.

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Last Modified: Mar 20, 2015
 
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