hornleaf riverweed
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Malpighiales
- family: Podostemaceae
- genus: Podostemum
- species: Podostemum ceratophyllum
- Canada
Mansfield City- Newtown
- Oxford
- Simsbury Center
- Storrs
- Weatogue
Connecticut- Danielsville
Georgia- Hometown
Pennsylvania- Fort Belvoir
Virginia- Washington, D. C.
Washington, D.C.
United States
Châteauguay