| Taxon | Penstemon laetus var. laetus |
| group | Eudicots |
| Family | Plantaginaceae |
| Family common name(s) | plantain; plantains |
| Genus common name(s) | penstemon; beardtongue; beard-tongue; beard tongue; bearded-tongue; bearded tongue; beardstongue; beards-tongue; beards tongue; beard's-tongue; beard's tongue |
| Species common name(s) | mountain blue penstemon; gay penstemon; gay beardtongue; happy penstemon; western gray penstemon; western grey penstemon; western gray beardtongue; western gray beard-tongue |
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| Common name(s) generally applied to other taxa or multiple taxa | blue penstemon, smooth penstemon, mountain blue beardtongue are applied to multiple Penstemon taxa; foothill penstemon is more commonly applied to Penstemon heterophyllus |
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| Synonymy: The Jepson Manual (1993), FNA, PLANTS, etc | Scrophulariaceae s.l. |
