Family: Potamogetonaceae
northern snail-seed pondweed, spiral-fruited pondweed
Robert W. Freckmann
Robert W. Freckmann
Etymology: Potamogeton: from Greek potamos, "a river," and geiton, "a neighbor," because of the habitat
Plants: perennial, submersed aquatic; stems slender, much branched, compact; slight, spreading rhizomes
Leaves: alternate, entire, with prominent midvein; submersed linear, curvy; floating elliptical; stipules fused to leaf blade more than half their length
Flowers: green-brown, small, various length stalks; inflorescence compact head to cylindrical cluster
Fruits: dry, flat disk-like, top toothed, sides smooth
Habitat: shallow water; in sediment soil
Conservation Status: Native
Plants: perennial, submersed aquatic; stems slender, much branched, compact; slight, spreading rhizomes
Leaves: alternate, entire, with prominent midvein; submersed linear, curvy; floating elliptical; stipules fused to leaf blade more than half their length
Flowers: green-brown, small, various length stalks; inflorescence compact head to cylindrical cluster
Fruits: dry, flat disk-like, top toothed, sides smooth
Habitat: shallow water; in sediment soil
Conservation Status: Native
Flora of North America: Flora of North America Floristic Rating: Coefficient of Conservatism = 8, Wetland Indicator = OBL USDA Plants Database: Federal Distribution and detailed information including photos
Robert W. Freckmann
Robert W. Freckmann
Paul Skawinski
Paul Skawinski
Robert W. Freckmann
© Wisconsin State Herbarium, UW-Madison
Department of Botany • 430 Lincoln Drive
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Madison, WI 53706 • Phone: 608-262-2792
Direct comments to wisconsin.state.herbarium@gmail.com
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