Robert W. Freckmann Herbarium

  Potamogeton zosteriformis Fernald image
Photographer: Paul Skawinski           

Botanical Illustration

Andrew Hipp

Paul Skawinski

Paul Skawinski

Paul Skawinski

Robert W. Freckmann
Family Potamogetonaceae
Potamogeton zosteriformis Fernald
flat-stem pondweed, flat-stemmed pondweed
Potamogeton: from Greek potamos, "a river," and geiton, "a neighbor," because of the habitat
zosteriformis: like Zostera
County distribution map- click for detailed distribution maps.
Detailed Distribution:
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Status: Native
Plant: perennial, submersed aquatic; stems flattened, angled, freely branching; slight rhizomes
Flower: green-brown, small; inflorescence cylindrical spike, spike above the water
Fruit:oval, dry seed with a sharp, narrow dorsal ridge
Leaf:alternate, entire, with prominent midvein; stiff, linear, many fine parallel veins, none floating; firm stipules free in leaf axil;
Habitat: water from shallow to >12' deep; in soft sediment soil

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

Flora of North America (off site)
Potamogeton compressus auct. non L.
Potamogeton zosterifolius auct. non Schumach.
Potamogeton zosterifolius Schumach. subsp. zosteriformis (Fernald) Hultén
Potamogeton zosterifolius Schumach. var. americanus A.Benn.

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