Large water-starwort
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Lamiales
- family: Plantaginaceae
- genus: Callitriche
- species: Callitriche heterophylla
Langley- North Cowichan
British Columbia- Bathurst
New Brunswick- Parrsboro
Nova Scotia
Canada
Auburn- Elba
- Frisco City
- Mobile
- Oneonta
Alabama- Little Rock
- North Little Rock
Arkansas- Carmel-by-the-Sea
- Julian
- Sebastopol
- Willits
California- Gardere
Louisiana- Beltsville
- Berwyn Heights
- Bladensburg
- Brentwood
- Brookmont
- Cabin John
- Charlotte Hall
- Chesapeake Beach
- Cheverly
- College Park
- Colmar Manor
- Cottage City
- District Heights
- East Riverdale
- Edmonston
- Forest Glen
- Four Corners
- Hyattsville
- La Plata
- Morningside
- Naval Academy
- North Beach
- Riverdale Park
- Silver Spring
- Suitland
- University Park
Maryland- Holyoke
Massachusetts- Stony Point
Michigan- Columbus
Mississippi- Elizabeth City
North Carolina- Pocono Pines
- Selinsgrove
Pennsylvania- Providence
Rhode Island- Centerville
- Lincolnville
- Summerville
South Carolina- Houston
Texas- Chehalis
- Montesano
- Port Angeles
- Seattle
- Tacoma
- White Salmon
- Yakima
Washington- Washington, D. C.
Washington, D.C.
United States
Aasiaat