Brazilian Waterweed

Scientific name: Egeria densa Planch.

Common names: Brazilian waterweed, Brazilian elodea, dense waterweed, leafy elodea

Native To: South America

Date of U.S. Introduction: 1893

Images: Invasive.org and Google

Means of Introduction: Aquarium trade

Impact: Crowds out native species

Current U.S. Distribution:

• PLANTS Database map (see complete PLANTS Profile for county distribution and native status)
• Early Detection & Distribution Mapping System
• NAS Database map

U.S. States and U.S. National Parks Where Reported Invasive: Invasive Plant Atlas of the United States map

Management Plans: Aquatic Species

Selected Internet Resources:

• Federal Government
• State Government
• University/Academic
• International
• Organizations

Egeria densa - Nonindigenous Aquatic Species Database
DOI. USGS. Southeast Ecological Science Center.
Identification/Description; Photographs; Introduction History; Impacts; Distribution; Special Note: Distribution maps and collection information (State and County)

Egeria densa
Integrated Taxonomic Information System.
Taxonomy

Egeria densa Planch. (Brazilian Elodea) - Aquatic Plant Information System (APIS)
United States Army Corps of Engineers. Engineer Research and Development Center. Environmental Laboratory.
Identification/Description; Introduction History; Impacts; Habitat; Distribution; Dispersion; Controls

Egeria densa Article Citation Search - AGRICOLA Database
USDA. National Agricultural Library.
Research; Special Note: NAL Catalog Search (resources)

Egeria densa - Germplasm Resources Information Network (GRIN)
USDA. ARS. National Genetic Resources Program.
Taxonomy

Plant Profile for Egeria densa - PLANTS Database
USDA. NRCS. National Plant Data Center.
Taxonomy; Distribution; Special Note: wetlands indicator status

Hydrilla, Brazilian elodea, and Common elodea - EncycloWeedia
California Department of Food and Agriculture.
Identification/Description; Photographs; Habitat; Distribution; Dispersion; Controls

S. American Waterweed: An Invasive Aquatic Plant (PDF | 330 KB)
Massachusetts Department of Conservation and Recreation. Water Resources. Lakes and Ponds Program.
Identification/Description; Photographs; Illustrations; Impacts; Habitat; Distribution; Controls

Brazilian Elodea - Vermont Invasive Exotic Plant Fact Sheet (PDF | 97 KB)
Vermont Agency of Natural Resources. Environmental Conservation.
Identification/Description; Illustrations; Impacts, Habitat; Distribution; Controls

Brazilian elodea
State of Washington. King County Department of Natural Resources. Water and Land Resources Division.
Identification/Description; Illustrations; Introduction History; Dispersion; Controls

Brazilian Elodea - Non-Native Freshwater Plants
Washington State Department of Ecology. Water Quality Program.
Identification/Description; Photographs; Introduction History; Impacts; Habitat; Distribution; Controls; Special Note: References

Class B Noxious Weed: Brazilian Elodea
Washington State Noxious Weed Control Board.
Taxonomy; Identification/Description; Photographs; Impacts; Habitat; Distribution; Dispersion; Controls; Legal Aspects

Brazillian Waterweed or Brazilian Elodea (Egeria densa)
Wisconsin Department of Natural Resources.
Identification/Distribution; Photographs; Introduction History; Impacts; Habitat; Distribution; Control; Special Note: Scientific review and assessment (PDF | 517 KB)

Egeria densa (Brazilian water-weed) - Invasive Plant Atlas of New England (IPANE)
University of Connecticut. Ecology and Evolutionary Biology.
Identification/Description; Photographs; Introduction History; Impacts; Habitat; Distribution; Special Note: References

Brazilian egeria - Invasive Plant Atlas of the United States
University of Georgia. Center for Invasive Species and Ecosystem Health.
Taxonomy; Identification/Description; Photographs; Introduction History; Distribution

Brazilian Waterweed - Maine Invasive Plants Bulletin no. 2524
University of Maine Cooperative Extension.
Identification/Description; Photographs; Impacts; Habitat; Controls

Aquatic Invaders: Brazilian Elodea (PDF | 524 KB)
National Sea Grant College Program; Association of Zoos and Aquariums.
Photographs; Introduction History; Impacts; Life Cycle; Habitat; Distribution; Dispersion; Controls

Brazilian Elodea or Egeria - Aquatic Weed Fact Sheet (PDF | 198 KB)
North Carolina State University. Agriculture and Life Sciences. Crop Science Department.
Identification/Description; Photographs; Habitat

Egeria densa Project
Portland State University. Center for Lakes and Reservoirs.
Identification/Description; Photographs; Impacts, Habitat; Distribution

Egeria - Aquaplant
Texas A&M University. Texas Cooperative Extension.
Identification/Description; Photographs; Illustrations; Controls

Brazilian Elodea or Egeria: Egeria densa - Virginia Tech Weed Identification Guide
Virginia Polytechnic Institute and State University. Plant Pathology, Physiology, and Weed Science.
Identification/Description; Photographs

Egeria densa - Plant Pest Control (PDF | 66 KB)
Hawke's Bay Regional Council (New Zealand).
Identification/Description; Photographs; Impacts; Controls

Weed Profile: Leafy elodea
New South Wales Department of Primary Industries (Australia).
Identification/Description; Photographs; Impacts; Distribution; Dispersion; Controls; Legal Aspects

Egeria densa (aquatic plant) - ISSG Global Invasive Species Database
World Conservation Union. Invasive Species Specialist Group.
Taxonomy; Identification/Description; Impacts; Life Cycle; Habitat; Distribution; Controls

Egeria densa - Invasive Plants of California's Wildlands Book (2000)
California Invasive Plant Council.
Identification/Description; Photographs; Illustrations; Life Cycle; Habitat; Distribution; Dispersion; Controls

Egeria densa
Discover Life.
Identification/Description; Photographs; Introduction History; Impacts; Life Cycle; Habitat; Distribution; Dispersion; Controls

Brazilian Waterweed - Maine's Interactive Field Guide to Aquatic Invaders and Their Native Look Alikes
Maine Volunteer Lake Monitoring Program. Maine Center for Invasive Aquatic Plants.
Identification/Description; Photographs; Illustrations; Introduction History; Life Cycle; Habitat; Distribution

Brazilian waterweed - Practical Guidebook to the Control of Invasive and Aquatic Wetland Plants of the San Francisco Bay-Delta Region
San Francisco Estuary Institute.
Identification/Description; Photographs