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Egeria densa Planch.
Brazilian waterweed; Brazilian-waterweed; Common waterweed; Dense waterweed; Egeria; Leafy elodea; South American waterweed; Anacharis; Elodea densa Planch Casp; Anacharis densa Planch Vict; Large-flowered Waterweed; Elodea densa (Planch) Casp; Brazilian Egeria

Life   Plantae   Monocotyledoneae   Hydrocharitaceae   Egeria

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Egeria densa
© Les Mehrhoff, 2008-2010 · 4
Egeria densa
Egeria densa
© Les Mehrhoff, 2008-2010 · 3
Egeria densa

Egeria densa, plant
© George Yatskievych, 2003 · 1
Egeria densa, plant
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https://plants.usda.gov/java/profile?symbol=EGDE ---> http://plants.usda.gov/core/profile?symbol=EGDE
http://plants.usda.gov/core/profile?symbol=EGDE ---> https://plants.usda.gov/core/profile?symbol=EGDE
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Egeria densa Planch.
Brazilian waterweed

General Information
Symbol: EGDE
Group: Monocot
Family: Hydrocharitaceae
Duration: Perennial
Growth Habit : Forb/herb
Native Status : CAN   W
HI   I
L48   I
PR   I
Data Source and Documentation
About our new maps
Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   




Symbol Scientific Name
ANDE8 Anacharis densa (Planch.) Vict.
ELDE3 Elodea densa (Planch.) Caspary
PHDE5 Philotria densa (Planch.) Small & H. St. John


Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Liliopsida – Monocotyledons
Subclass Alismatidae
Order Hydrocharitales
Family Hydrocharitaceae – Tape-grass family
Genus Egeria Planch. – egeria
Species Egeria densa Planch. – Brazilian waterweed

Subordinate Taxa

This plant has no children

Legal Status

Noxious Weed Information
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete noxious weed list for that location, or click here for a composite list of all Federal and State Noxious Weeds .
Alabama Brazilian elodea Class C noxious weed
Connecticut Brazilian water-weed Potentially invasive, banned
Maine Brazilian elodea Invasive aquatic plant
Massachusetts Brazilian waterweed, Brazilian eloda Prohibited
Oregon Elodea densa South American waterweed, elodea "B" designated weed South American waterweed, elodea Quarantine
South Carolina Brazilian elodea Invasive aquatic plant Brazilian elodea Plant pest
Vermont Brazilian elodea Class A noxious weed
Washington Brazilian elodea Class B noxious weed Brazilian elodea Wetland and aquatic weed quarantine
U.S. Weed Information
Egeria densa Brazilian e South American waterweed State Elodea densa South American waterweed
This plant and synonym italicized and indented above can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of Weeds of the U.S.
STATE Assorted authors. State noxious weed lists for 46 states . State agriculture or natural resource departments.
Cal-IPC California Invasive Plant Council. 2006. California Invasive Plant Inventory. Cal-IPC Publication 2006-02 (1 February 2007). California Invasive Plant Council. Berkeley, California.
HEAR USDI, Geological Survey. 1999. Information index for selected alien plants in Hawaii (20 October 2003). Hawaiian Ecosystems at Risk Project, Biological Resources Division, Haleakala Field Station. Makawao, Hawaii.
NE&GP Stubbendieck, J., G.Y. Friisoe,and M.R. Bolick. 1994. Weeds of Nebraska and the Great Plains . Nebraska Department of Agriculture, Bureau of Plant Industry. Lincoln, Nebraska.
SEEPPC Southeast Exotic Pest Plant Council. 1996. Invasive exotic pest plants in Tennessee (19 October 1999). Research Committee of the Tennessee Exotic Pest Plant Council. Tennessee.
WI Hoffman, R.and K. Kearns (eds.). 1997. Wisconsin manual of control recommendations for ecologically invasive plants . Wisconsin Dept. Natural Resources. Madison, Wisconsin.
WSWS Whitson, T.D. (ed.) et al.. 1996. Weeds of the West . Western Society of Weed Science in cooperation with Cooperative Extension Services, University of Wyoming. Laramie, Wyoming.

Wetland Status

Interpreting Wetland Status

Top Level Regions
Caribbean OBL
Hawaii OBL
North America
Arid West OBL
Atlantic and Gulf Coastal Plain OBL
Eastern Mountains and Piedmont OBL
Great Plains OBL
Midwest OBL
Northcentral & Northeast OBL
Western Mountains, Valleys, and Coast OBL

Related Links

More Accounts and Images
ARS Germplasm Resources Information Network (EGDE)
CalPhotos (EGDE)
Flora of North America (EGDE)
Integrated Taxonomic Information System (ANDE8)
Integrated Taxonomic Information System (EGDE)
Integrated Taxonomic Information System (ELDE3)
Integrated Taxonomic Information System (PHDE5)
Jepson Interchange (University of California - Berkeley) (EGDE)
USF Atlas of Florida Vascular Plants (EGDE)
University of Tennessee Herbarium (Distribution) (EGDE)
Related Websites
CA-California Encycloweedia (EGDE)
CA-Invasive Plants of the San Francisco Bay (EGDE)
CT-USDA NRCS Invasive Species Identification Sheets (EGDE)
FL-University of Florida Center for Aquatic (EGDE)
OR-Portland State University (EGDE)
VA-Virginia Tech Weed Identification Guide (EGDE)
VT-Invasive Exotic Plant Fact Sheet (EGDE)
WA-King County Natural Resources (EGDE)
WA-NonNative Freshwater Plants (EGDE)



Source Large Mammals Small Mammals Water Birds Terrestrial Birds


Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover

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Following modified from Flora of North America
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Link to Flora of North America home
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FNA Vol. 22 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 22 | Hydrocharitaceae | Egeria

1. Egeria densa Planchon, Annales des Sciences Naturelles, Botanique. sér. 3, 11: 80. 1849.


Stems 1--3 mm diam. Leaves whorled, recurved, 10--40 ´ 1.5--4.5 mm. Staminate spathes 2--4-flowered, 7.5--12 mm; pedicel to 80 mm. 2n = 46.

Flowers summer--fall. Shallow waters of lakes and streams; introduced; 0--500 m; introduced; Ala., Ark., Calif., Colo., Del., Fla., Ga., Ill., Ind., Kans., Ky., La., Md., Mass., Miss., Mo., N.J., N.Mex., N.Y., N.C, Okla., Oreg., Pa., S.C., Tenn., Tex., Vt., Va., W.Va.; Mexico; West Indies; Central America; native, South America; Europe; Africa; Asia; Australia.

Egeria densa is native to southeastern Brazil and has been widely sold in the aquarium trade, often becoming established in nature. Only staminate plants of E. densa have been observed outside its native range. Reproduction, then, occurs entirely by vegetative methods. No differentiated vegetative reproductive structures (turions, bulbils, etc.) are known (C. D. K. Cook and K. Urmi-König 1984b); however, the species is known to live temporarily under ice. The leaves of Egeria densa, which are only two cell-layers thick, are much used to demonstrate plant-cell structure and cytoplasmic streaming in introductory botany courses.

Following modified from CalPhotos
   Top | See original

http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Egeria+densa&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Egeria+densa&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

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Number of matches : 6
Query: SELECT * FROM img WHERE ready=1 and taxon like "Egeria densa%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Egeria densa
Egeria densa
Brazilian Water Weed
ID: 0175 3301 2372 0017 [detail]
© 2001 CDFA

Egeria densa
Egeria densa
Brazilian Water Weed
ID: 0175 3301 2372 0015 [detail]
© 2001 CDFA

Egeria densa
Egeria densa
Brazilian Waterweed
ID: 6212 3041 0479 0089 [detail]
© 1995 Saint Mary's College of California

Egeria densa
Egeria densa
Brazilian Water Weed
ID: 0175 3301 2372 0016 [detail]
© 2001 CDFA

Egeria densa
Egeria densa
Brazilian Waterweed
ID: 6212 3041 0479 0090 [detail]
© 1995 Saint Mary's College of California

Egeria densa
Egeria densa
ID: 0000 0000 0509 1985 [detail]
© 2009 Barry Rice

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