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You are here: Home / Aquatic Species / Species Profiles / Giant Salvinia
Aquatic Species
Species Profiles

Giant Salvinia

Giant SalviniaScientific name: Salvinia molesta D. S. Mitch. (ITIS)

Common names: Giant salvinia, kariba-weed

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Selected Resources

Native To: Brazil (McFarland et al. 2004)

Date of U.S. Introduction: 1990s (McFarland et al. 2004)

Means of Introduction: Horticultural trade (McFarland et al. 2004)

Impact: Forms dense mats that block sunlight and reduce oxygen levels (McFarland et al. 2004)

Current U.S. Distribution:

Federally Regulated:

  • Listed as a Federal Noxious Weed under the Plant Protection Act, which makes it illegal in the U.S. to import or transport between States without a permit (USDA, APHIS - Noxious Weeds Program)



  • Giant Salvinia at Caddo Lake (or select Play button below)
    Greater Caddo Lake Association. (YouTube).

Selected Resources:


Giant Salvinia
Aquatic Nuisance Species Task Force.


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

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

Texas Invasives Database - Salvinia molesta

Invasive Species Compendium - Salvinia molesta
CAB International.

Salvinia molesta (Salviniaceae)
European and Mediterranean Plant Protection Organization.

Global Invasive Species Database - Salvinia molesta (aquatic plant)
World Conservation Union. Invasive Species Specialist Group.


Salvinia molesta Mitchell (Giant Salvinia) - Aquatic Plant Information System (APIS)
DOD. USACE. Engineer Research and Development Center. Environmental Laboratory.

Germplasm Resources Information Network (GRIN) - Salvinia molesta
USDA. ARS. National Genetic Resources Program.

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

PLANTS Database - Kariba-weed
USDA. NRCS. National Plant Data Center.

Salvinia - Weed Management Guide (PDF | 431 KB)
Cooperative Research Centre for Australian Weed Management.

Queensland Department of Agriculture, Fisheries and Forestry (Australia).

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


Giant Salvinia (Salvinia molesta)
Arizona Department of Agriculture.

Salvinia - EncycloWeedia
California Department of Food and Agriculture.

Giant Salvinia
Colorado Department of Agriculture. Noxious Weed Management Program.

Salvinia molesta
Florida Fish and Wildlife Conservation Commission.

Special Salvinia Alert! (PDF | 1.37 MB)
South Carolina Department of Natural Resources.

Giant Salvinia - Vermont Invasive Exotic Plant Fact Sheet (PDF | 114 KB)
Vermont Agency of Natural Resources. Environmental Conservation.


Weed Control in Natural Areas in the Western United States: Giant Salvinia (2013; PDF | 194 KB)
University of California. Weed Research and Information Center.

Salvinia molesta
University of Florida. Center for Aquatic and Invasive Plants.

Invasive Plant Atlas of the MidSouth - Giant Salvinia
Mississippi State University. GeoResources Institute.

Identification and Management of Giant Salvinia (PDF | 394 KB)
University of Nevada - Reno. Cooperative Extension.

Giant Salvinia - Aquaplant
Texas A&M University. Texas Agricultural Extension Service.


Giant Salvinia
Colorado Weed Management Association.

Salvinia molesta (Kariba Weed)
East African Network for Taxonomy.

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

Salvinia molesta
Pacific Island Ecosystems at Risk.


Integrated Taxonomic Information System. Salvinia molesta. [Accessed Sep 10, 2014].

McFarland, D.G., L.S. Nelson, M.J. Grodowitz, R.M. Smart, and C.S. Owens. 2004. Salvinia molesta D. S. Mitchell (Giant Salvinia) in the United States: A Review of Species Ecology and Approaches to Management (PDF | 3.37 MB) U.S. Army Engineer Research and Development Center Environmental Laboratory. ERDC/EL SR-04-2.

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Last Modified: May 16, 2015
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