MacKenzie's willow
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Malpighiales
- family: Salicaceae
- genus: Salix
- species: Salix prolixa
Dawson Creek- Delta
- Ladner
- Lillooet
- Quesnel
- Revelstoke
British Columbia
Canada
Bishop- Dixon Lane-Meadow Creek
California- Bozeman
- Deer Lodge
Montana
United States