Robert W. Freckmann Herbarium


  Potamogeton robbinsii Oakes image
Photographer: Robert W. Freckmann           

Matthew L. Wagner

Paul Skawinski

Paul Skawinski

Paul Skawinski

Robert W. Freckmann
Family Potamogetonaceae
Potamogeton robbinsii Oakes
fern pondweed, Robbins' pondweed
Potamogeton: from Greek potamos, "a river," and geiton, "a neighbor," because of the habitat
robbinsii: for James Watson Robbins (1801-1879)
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: perennial, submersed aquatic; stems robust; spreading rhizomes
Flower: green-brown, small, stalk from upper leaf axils; inflorescence spike of whorls
Fruit:dry seed with a sharp dorsal ridge and 2 rounded lateral ridges, fruit rarely develops
Leaf:alternate, entire, with prominent midvein; strongly 2-ranked, feather-like, firm, linear, wrapping stem; closely spaced, finely serrated edges
Habitat: deeper water
Notes: where leaf and fibrous stipules meet and fuse, leaf has ear-like lobes; no floating leaves
(Glossary)

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

Flora of North America (off site)
Synonyms 
Potamogeton robbinsii Oakes f. cultellatus Fassett

         
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