The Genus Penstemon

Tongue-leaved Penstemon: Penstemon anguineus (Synonym: Penstemon rattanii var. minor) -

Azure Penstemon: Penstemon azureus var. azureus -

Cardwell's Penstemon, Cardwell's Beardtongue: Penstemon cardwellii -

Yellow Penstemon, Lesser Yellow Beardtongue: Penstemon confertus -

Davidson's Penstemon, Davidson's Beardtongue: Penstemon davidsonii var. davidsonii (Synonym: Penstemon menziesii ssp. davidsonnii) -

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 -

Ovate-leaved Hotrock Beardtongue: Penstemon deustus var. suffrutescens -

Glaucous Penstemon, Glaucous Beardtongue: Penstemon euglaucus - ?

Bush Penstemon, Shrubby Penstemon: Penstemon fruticosus var. fruticosus -

Slender Penstemon: Penstemon gracilientus -

Mountain Blue Penstemon: Penstemon laetus var. sagittatus -

Berry's Penstemon: Penstemon newberryi var. 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, Penstemon procerus var. tolmiei) -

Rattan's Penstemon: Penstemon rattanii var. rattanii -

Richardson's Penstemon: Penstemon richardsonii var. richardsonii -

Roezl's Penstemon, Roezlii's Penstemon: Penstemon roezlii (Synonym: Penstemon laetus var. roezlii) -

Cliff Penstemon, Rock Penstemon: Penstemon rupicola -

Rydberg's Penstemon: Penstemon rydbergii var. oreocharis (Synonyms: Penstemon hesperius, Penstemon oreocharis) -

Coast Penstemon, Cascades Penstemon, Cascade Beardtongue, Serrulate Penstemon: Penstemon serrulatus -

Royal Penstemon, Royal Beardtongue, Showy Penstemon: Penstemon speciosus -