Bush Penstemon: Keckiella lemmonii (Synonym: Penstemon lemmonii)
Woodland Beard Tongue: Nothochelone nemorosa (Synonym: Penstemon nemorosus)
Siskiyou Penstemon, Tongue-leaved Penstemon: Penstemon anguineus (Synonym: Penstemon rattanii var. minor) -
Azure Penstemon: Penstemon azureus var. azureus (Synonym: Penstemon azureus ssp. azureus) -
Cardwell's Beardtongue, Cardwell's Penstemon: Penstemon cardwellii -
Lesser Yellow Beardtongue, Yellow Penstemon: Penstemon confertus -
Davidson's Penstemon, Davidson's Beardtongue: Penstemon davidsonii var. davidsonii (Synonyms: Penstemon menziesii ssp. davidsonii, Penstemon menziesii ssp. thompsonii) -
Menzies' Penstemon, Davidson's Penstemon: Penstemon davidsonii var. menziesii (Synonym: Penstemon menziesii ssp. menziesii) -
Hotrock Beardtongue, Hotrock Penstemon, Hot-rock Penstemon, Scabland Penstemon: Penstemon deustus var. deustus (Synonym: Penstemon deustus ssp. deustus) -
Hotrock Beardtongue, Hotrock Penstemon, Lanceleaf Hotrock Penstemon: Penstemon deustus var. pedicellatus (Synonyms: Penstemon deustus ssp. heterander, Penstemon deustus var. heterander)
Ovate-leaved Hotrock Beardtongue: Penstemon deustus var. suffrutescens -
Glaucous Penstemon, Glaucous Beardtongue: Penstemon euglaucus -
Slender Penstemon: Penstemon gracilientus -
Tall Penstemon: Penstemon hesperius (Synonym: Penstemon rydbergii var. oreocharis) -
Cheerful Penstemon, Gay Penstemon, Mountain Blue Penstemon: Penstemon laetus var. sagittatus (Synonym: Penstemon laetus ssp. sagittatus) -
Berry's Penstemon: Penstemon newberryi var. berryi (Synonym: Penstemon newberryi ssp. berryi) -
Broad-leaved Penstemon, Egg-leaf Beardtongue: Penstemon ovatus -
Small Azure Beardtongue: Penstemon parvulus (Synonym: Penstemon azureus var. parvulus) -
Pincushion Beardtongue: Penstemon procerus var. brachyanthus (Synonyms: Penstemon brachyanthus, Penstemon tolmiei ssp. brachyanthus) -
Pincushion Beardtongue, Small-flowered Penstemon: Penstemon procerus var. procerus -
Small-flowered Penstemon, Tolmie's Penstemon: Penstemon procerus var. tolmiei (Synonym: Penstemon tolmiei) -
Rattan's Penstemon: Penstemon rattanii var. rattanii (Synonym: Penstemon rattanii ssp. rattanii) -
Cutleaf Penstemon, Richardson's Penstemon: Penstemon richardsonii var. richardsonii -
Roezl's Penstemon, Roezli's Penstemon: Penstemon roezlii (Synonyms: Penstemon laetus ssp. roezlii, Penstemon laetus var. roezlii) -
Cliff Beardtongue, Cliff Penstemon, Rock Penstemon: Penstemon rupicola (Synonym: Penstemon newberryi var. rupicola) -
Rydberg's Penstemon: Penstemon rydbergii var. oreocharis (Synonyms Penstemon oreocharis) -
Cascades Penstemon, Cascade Beardtongue, Coast Penstemon, Serrulate Penstemon: Penstemon serrulatus -
Royal Beardtongue, Royal Penstemon, Showy Penstemon: Penstemon speciosus (Synonym: Penstemon speciosus ssp. kennedyi) -
Fine-toothed Beardtongue, Subserrate Beardtongue: Penstemon subserratus -