Family: Potamogetonaceae
northern snail-seed pondweed, spiral-fruited pondweed
Robert W. Freckmann
Robert W. Freckmann
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 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
