Robert W. Freckmann Herbarium

  Potamogeton spirillus Tuck. image
Photographer: Robert W. Freckmann           

Paul Skawinski

Paul Skawinski

Robert W. Freckmann

Robert W. Freckmann
Family Potamogetonaceae
Potamogeton spirillus Tuck.
northern snail-seed pondweed, spiral-fruited pondweed
Potamogeton: from Greek potamos, "a river," and geiton, "a neighbor," because of the habitat
spirillus: spiralled
County distribution map- click for detailed distribution maps.
Detailed Distribution:
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Status: Native
Plant: perennial, submersed aquatic; stems slender, much branched, compact; slight, spreading rhizomes
Flower: green-brown, small, various length stalks; inflorescence compact head to cylindrical cluster
Fruit:dry, flat disk-like, top toothed, sides smooth
Leaf:alternate, entire, with prominent midvein; submersed linear, curvy; floating elliptical; stipules fused to leaf blade more than half their length
Habitat: shallow water; in sediment soil

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

Flora of North America (off site)
Potamogeton dimorphus Raf., misapplied

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