Narrowleaf willow
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Malpighiales
- family: Salicaceae
- genus: Salix
- species: Salix exigua
Grand Forks- Kamloops
- Vernon
British Columbia- Tobermory
Ontario- Sainte-Marthe-sur-le-Lac
Quebec
Canada
Ciudad Juárez
Chihuahua- Tlacotalpan
Veracruz
Mexico
Agoura- Alturas
- Avalon
- Bakersfield
- Biggs
- Boyes Hot Springs
- Calexico
- Calistoga
- Colton
- Farmersville
- Fetters Hot Springs-Agua Caliente
- Florence-Graham
- Guerneville
- Hydesville
- Ione
- Lincoln Village
- Lone Pine
- Los Angeles
- Meiners Oaks
- Mira Monte
- Monte Rio
- Nice
- Orangevale
- Palm Springs
- Penn Valley
- Rancho Murieta
- Redding
- Roseland
- Sacramento
- San Bernardino
- Santa Rosa
- Tahoma
- Ukiah
- Vacaville
- Victorville
- Visalia
- Walnut Grove
- Weaverville
- Westhaven-Moonstone
- Willow Creek
California- Hartford
- Middletown
Connecticut- Coushatta
- Krotz Springs
- Lecompte
- River Ridge
Louisiana- Brookmont
Maryland- Bigfork
- Livingston
Montana- North Platte
Nebraska- Carson City
- Reno
- Verdi
- Virginia City
Nevada- Purcellville
Virginia- Dallesport
- Ellensburg
- Omak
- Pullman
- Sunnyslope
- Waitsburg
- White Salmon
- Yakima
Washington- Washington, D. C.
Washington, D.C.- Fort Atkinson
Wisconsin- Green River
- Kemmerer
Wyoming
United States