lilac penstemon
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Lamiales
- family: Plantaginaceae
- genus: Penstemon
- species: Penstemon gracilis
- Lethbridge
- Peace River
Alberta
Canada- Kittredge
Colorado- West Peoria
Illinois- Brainerd
- Minneapolis
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Minnesota- Spearfish
South Dakota
United States