little duckweed
- kingdom: Plantae
- phylum: Tracheophyta
- class: Liliopsida
- order: Alismatales
- family: Araceae
- genus: Lemna
- species: Lemna obscura
Mobile
Alabama- Wailua
Hawaii- Brookfield
- La Grange Park
- North Riverside
- Riverside
Illinois- Brookmont
- Cabin John
- Chesapeake Beach
- North Beach
Maryland- Coalville
Utah
United States