Rocky Mountain willowherb
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Myrtales
- family: Onagraceae
- genus: Epilobium
- species: Epilobium saximontanum
Gaspé
Quebec
Canada- Luxembourg
Georgetown- Manitou Springs
Colorado
United States
Esch-sur-Alzette