dotted watermeal
- kingdom: Plantae
- phylum: Tracheophyta
- class: Liliopsida
- order: Alismatales
- family: Araceae
- genus: Wolffia
- species: Wolffia borealis
Brookfield- La Grange Park
- North Riverside
- Riverside
Illinois- Prince Frederick
Maryland- Clear Lake
- Oroville
- Ridgefield
Washington
United States