Common buckthorn
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Rosales
- family: Rhamnaceae
- genus: Rhamnus
- species: Rhamnus cathartica
Boulder- Denver
- Greenwood Village
- Southglenn
Colorado
United States
Common buckthorn Boulder Denver Greenwood Village Southglenn