Potamogeton strictifolius A. Benn.
Common Name: PONDWEED
Coefficient of Conservatism: 6
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt P-Forb

Lakes and streams, at depths up to 5 m or more.

Potamogeton strictifolius tends to have more rigid, revolute, deeper (almost olive) green leaves than does P. friesii, but no clear distinction can be made on these characters. Leaves of plants otherwise clearly P. friesii may have revolute margins, although they are typically flat. The two species as here treated are usually easily separable although some specimens present difficulties. Potamogeton ×haynesii Hellq. & G. E. Crow (P. ×longiligulatus of Michigan Flora) appears to be a hybrid of P. strictifolius with P. zosteriformis and is of scattered occurrence in the state.


Alcona County
Alger County
Allegan County
Barry County
Benzie County
Berrien County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Clare County
Clinton County
Emmet County
Gogebic County
Grand Traverse County
Ingham County
Iosco County
Iron County
Jackson County
Kalamazoo County
Kent County
Keweenaw County
    Including Isle Royale
Lenawee County
Livingston County
Mackinac County
Marquette County
Menominee County
Montcalm County
Montmorency County
Oakland County
Oscoda County
Ottawa County
Presque Isle County
Roscommon County
Schoolcraft County
St. Clair County
St. Joseph County
Washtenaw County
Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. November 29, 2022. https://michiganflora.net/species.aspx?id=2342.