Welsh mudwort
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Lamiales
- family: Scrophulariaceae
- genus: Limosella
- species: Limosella australis
Montague
Prince Edward Island- Saint-Augustin-de-Desmaures
Quebec
Canada
East Haven- Milford
- New Haven
- Poquonock Bridge
Connecticut- Kingston
Massachusetts- Manahawkin
New Jersey- Fort Montgomery
- Stony Point
- West Haverstraw
New York
United States