Columbian water-meal
- kingdom: Plantae
- phylum: Tracheophyta
- class: Liliopsida
- order: Alismatales
- family: Araceae
- genus: Wolffia
- species: Wolffia columbiana
Brundidge
Alabama- Kent
- Litchfield
- New Haven
Connecticut- Volo
Illinois- Gary
Indiana- Cabin John
Maryland
United States