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 nuttallii (Planch.) H.St.John image
Photographer: Paul Skawinski           

Paul Skawinski

from USDA Plants website
Family Hydrocharitaceae
Elodea nuttallii (Planch.) H.St.John
free-flowered water-weed, slender water-weed
Elodea: Greek elodes for "marsh"
nuttallii: for Thomas Nuttall (1786-1859)
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, 3-6-parted (clawed) female flowers small, waxy; male flowers break free at maturity; male and female flowers on separate plants
Leaf:linear to lance-like, bright green, stalkless, not firm, edges folded, more or less equally spaced along 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 nuttallii Planch.
Anacharis occidentalis (Pursh) Vict.
Elodea columbiana H.St.John
Elodea minor (Engelm. ex Casp.) Farw.
Elodea occidentalis (Pursh) H.St.John
Philotria angustifolia (Muhl.) Britton ex Rydb.
Philotria minor (Engelm. ex Casp.) Small
Philotria nuttallii (Planch.) Rydb.
Philotria occidentalis (Pursh) House
Udora verticillata (L.f.) Spreng. var. minor Engelm. ex Casp.

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