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Photographer: Paul Skawinski
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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
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| 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 |
| (Glossary) |
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 Rydb.&phog=Emmet J. Judziewicz&spcode=POTRIC)
 Rydb.&phog=Matthew L. Wagner&spcode=POTRIC)
 Rydb.&phog=Matthew L. Wagner&spcode=POTRIC)
 Rydb.&phog=Paul Skawinski&spcode=POTRIC)
 Rydb.&phog=Paul Skawinski&spcode=POTRIC)
 Rydb.&phog=Robert W. Freckmann&spcode=POTRIC)
 Rydb.&phog=Robert W. Freckmann&spcode=POTRIC)
