American marshpennywort
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Apiales
- family: Apiaceae
- genus: Hydrocotyle
- species: Hydrocotyle americana
Vaughan- Willowdale
Ontario- Charlemagne
- Montréal
Quebec
Canada
Borough of Bronx
New York- Bull Run Mountain Estates
- Fairfax
- McLean
- Woodbridge
Virginia- Washington, D. C.
Washington, D.C.- Antigo
Wisconsin
United States