| canada | alberta | penstemon fruticosus | species | 2 | 0 |
| united states | | penstemon fruticosus | species | 1 | 0 |
| united states | idaho | penstemon fruticosus | species | 3 | 0 |
| united states | idaho | penstemon fruticosus var. scouleri | varietas | 2 | 0 |
| united states | oregon | penstemon fruticosus var. serratus | varietas | 4 | 0 |