Family: Potamogetonaceae
fern pondweed, Robbins' pondweed
[Potamogeton robbinsii f. cultellatus Oakes]
Brenton Butterfield
Brenton Butterfield
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 robust; spreading rhizomes
Leaves: alternate, entire, with prominent midvein; strongly 2-ranked, feather-like, firm, linear, wrapping stem; closely spaced, finely serrated edges
Flowers: green-brown, small, stalk from upper leaf axils; inflorescence spike of whorls
Fruits: dry seed with a sharp dorsal ridge and 2 rounded lateral ridges, fruit rarely develops
Habitat: deeper water
Conservation Status: Native
Plants: perennial, submersed aquatic; stems robust; spreading rhizomes
Leaves: alternate, entire, with prominent midvein; strongly 2-ranked, feather-like, firm, linear, wrapping stem; closely spaced, finely serrated edges
Flowers: green-brown, small, stalk from upper leaf axils; inflorescence spike of whorls
Fruits: dry seed with a sharp dorsal ridge and 2 rounded lateral ridges, fruit rarely develops
Habitat: deeper water
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
Brenton Butterfield
Brenton Butterfield
Brenton Butterfield
Robert W. Freckmann
