Pistia stratiotes L. Royle (ITIS)
Water lettuce, tropical duckweed
Unknown, possibly South America, Africa, or the U.S. (Dray et al. 1988)
First described in Florida in 1765; experts disagree as to whether water lettuce is native to the U.S. (Ramey 2001)
Unknown (possibly native to the U.S., or it may have arrived in ballast water) (Ramey 2001)
Grows into dense mats that clog waterways (Ramey 2001)
Distribution / Maps / Survey Status
University of Georgia. Center for Invasive Species and Ecosystem Health.Provides state, county, point and GIS data. Maps can be downloaded and shared.
DOI. USGS. Wetland and Aquatic Research Center.Provides detailed collection information as well as animated map.
Google. YouTube; University of Florida. IFAS. Center for Aquatic and Invasive Plants.
The section below contains highly relevant resources for this species, organized by source. Or, to display all related content view all resources for Water Lettuce.
Texas Commission on Environmental Quality, Galveston Bay Estuary Program; Houston Advanced Research Center (HARC).
Business Queensland (Australia).
State and Local Government
Wisconsin Department of Natural Resources.
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 (Technical Report A-88-6). Jacksonville, Fla.: U.S. Army Corps of Engineers Aquatic Plant Control Research Program.
Integrated Taxonomic Information System. Pistia stratiotes. [Accessed Sep 10, 2014].
Ramey, V. 2001. Water lettuce. University of Florida, IFAS Extension, Center for Aquatic and Invasive Plants.