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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  Potamogeton richardsonii (A.Benn.) Rydb. image
Photographer: Paul Skawinski           

Botanical Illustration

Emmet J. Judziewicz

Matthew L. Wagner

Matthew L. Wagner

Paul Skawinski

Paul Skawinski

Robert W. Freckmann

Robert W. Freckmann
Family Potamogetonaceae
Potamogeton richardsonii (A.Benn.) Rydb.
Richardson's pondweed
Potamogeton: from Greek potamos, "a river," and geiton, "a neighbor," because of the habitat
richardsonii: for Sir John Richardson (1787-1865, its discoverer), Scottish naturalist and boreal and artic North American explorer
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: perennial, submersed aquatic; stems sinuous; from spreading rhizomes
Flower: olive green, small, stalk from upper leaf axils; inflorescence cylindrical spike, densely packed
Fruit:dry seed with plump, round, prominent beak, sharp-angled turions not pinecone like
Leaf:alternate, entire, with prominent midvein, curly smooth edge, oblong; base heart-shaped clasp over .5-.75 of stem, none floating
Habitat: water to >12' deep; in soft sediment soil
Notes: fibrous stipule disintegrating to white fibers at leaf nodes

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

Flora of North America (off site)
Potamogeton perfoliatus L. subsp. richardsonii (A.Benn.) Hultén
Potamogeton perfoliatus L. var. richardsonii A.Benn.

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