| Family | PLANTAGINACEAE |
| Genus species | Penstemon serrulatus Menzies sect. Saccanthera |
| Bibliography | Cycl. [A.Rees] 26: no. 5 (1814) |
| Native Range | se. Alaska to sw. Oregon |
| Primary Biome | Temperate |
| Habitat | alluvial gravel |
| Altitude | 0-1800m |
| Description | stem leaves opposite, glabrous, petiolate or sessile, ovate or lanceolate, the upper amplexicaule, serrate, acute, thyrsus cylindrical, corolla slightly ventricose, 17-25mm |
| Size | 13-80cm |
| Color | blue, violet, purple |
| Bloom | summer |
| Ca | |
| Type | perennial |
| Cultivation | gravelly, humous, moist, sunny site alpine house, moist, humous, gravelly soil, sun |
| Propagation | seed in spring, barely covered, germ. 1-3 months, 13-18°C division in spring; cuttings in late summer |
| Synonyms | Penstemon argutus Paxton Penstemon diffusus Douglas Penstemon diffusus f. albiflorus Hardin Penstemon themisteri E.Vilm. |
| Territory | 7 Northern America 70 Subarctic America (ASK Alaska) 71 Western Canada (BRC British Columbia) 73 Northwestern U.S.A. (ORE Oregon, WAS Washington) |