Siler's penstemon
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Lamiales
- family: Plantaginaceae
- genus: Penstemon
- species: Penstemon linarioides
Camp Verde- Clifton
- Ehrenberg
- Flagstaff
- Fort Defiance
Arizona- Borough of Bronx
New York- Saint George
Utah
United States