flat-stem pondweed
- kingdom: Plantae
- phylum: Tracheophyta
- class: Liliopsida
- order: Alismatales
- family: Potamogetonaceae
- genus: Potamogeton
- species: Potamogeton zosteriformis
Chestermere
Alberta- Kamloops
British Columbia- Wingham
Ontario
Canada
Danbury- Plainville
- Weatogue
Connecticut- McCullom Lake
Illinois- Hobart
- New Chicago
- Whiting
Indiana- Arnolds Park
- Carter Lake
Iowa- Shoreview
Minnesota- Bigfork
Montana- Green Island
- Scotia
- Troy
- Watervliet
New York- Sandusky
Ohio- Ashland
Oregon- Erie
Pennsylvania- Alexandria
- Belle Haven
- Huntington
Virginia- Clear Lake
Washington- Milwaukee
Wisconsin
United States