Robert W. Freckmann Herbarium


Because of technology changes and personnel changes at UWSP and the Wisconsin State Herbarium, the database of plant species housed at this site was merged with the database from the OLD WisFlora website to create a new Flora of Wisconsin website at Currently we are encouraging all Wisplant viewers to begin using the Flora of Wisconsin website as soon as possible. Wisplants will remain operational through July 13th. After that date, all traffic to Wisplants will be redirected to the Flora of Wisconsin website.

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  Elodea canadensis Michx. image
Photographer: Paul Skawinski           

Botanical Illustration

Corey Raimond

Dennis W. Woodland

Matthew L. Wagner

Paul Skawinski

Paul Skawinski

Paul Skawinski

Robert W. Freckmann

Robert W. Freckmann
Family Hydrocharitaceae
Elodea canadensis Michx.
Canadian waterweed, common waterweed
Elodea: Greek elodes for "marsh"
canadensis: of or referring to Canada
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: drooping/tangling, perennial, submersed aquatic, flowers floating; branched stems to 40"; roots shallow
Flower: white, 3-to 6-parted (clawed) female flowers small, waxy; rare male flowers in long, thin spathe, stay on the stalk when mature; male and female flowers on separate plants
Leaf:linear to lance-like, bright green, stalkless, firm and flat; denser toward the top of the stem; 2-3 per whorl
Habitat: quiet water; in fine sediment soil

More Information Natural Communities Herbarium Specimens
All Elodea list Google- Images or Text

Flora of North America (off site)
Anacharis canadensis (Michx.) Planch.
Anacharis canadensis (Michx.) Planch. var. planchonii (Casp.) Vict.
Elodea brandegeae H.St.John
Elodea ioensis Wylie
Elodea linearis (Rydb.) H.St.John
Elodea planchonii Casp.
Philotria canadensis (Michx.) Britton
Philotria linearis Rydb.

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