Potamogeton gramineus L.
Family: Potamogetonaceae
grass-leaved pondweed, variable-leaved pondweed
[Potamogeton heterophyllus auct. non Schreb.]
Potamogeton gramineus image
Potamogeton gramineus image
Robert W. Freckmann  
Potamogeton gramineus image
University of Wisconsin-Stevens Point, Robert W. Freckmann Herbarium (UWSP)  
Etymology: Potamogeton: from Greek potamos, "a river," and geiton, "a neighbor," because of the habitat
Plants: perennial, submersed aquatic; stems branched; spreading rhizomes
Leaves: alternate, entire, with prominent midvein; submersed linear-lance like; 3-7 veins, stemless; floating stalked, 11-19 vein; stipules free in leaf axils
Flowers: green-brown, small, stout stalk; inflorescence dense cylindrical spike
Fruits: dry, flat oval
Habitat: water about 3' deep; in firm sediment soil
Conservation Status: Native