 Penstemon abietinus
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 Penstemon absarokensis
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 Penstemon acaulis
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 Penstemon acuminatus
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 Penstemon alamosensis
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 Penstemon albertinus
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 Penstemon albidus
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 Penstemon albomarginatus
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 Penstemon alluviorum
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 Penstemon ambiguus
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 Penstemon ammophilus
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 Penstemon anguineus
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 Penstemon angustifolius
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 Penstemon arenarius
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 Penstemon arenicola
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 Penstemon aridus
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 Penstemon arkansanus
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 Penstemon attenuatus
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 Penstemon atwoodii
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 Penstemon auriberbis
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 Penstemon australis
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 Penstemon azureus
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 Penstemon baccharifolius
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 Penstemon barbatus
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 Penstemon barnebyi
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 Penstemon barrettiae
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 Penstemon bicolor
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 Penstemon bracteatus
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 Penstemon breviculus
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 Penstemon buckleyi
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 Penstemon caesius
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 Penstemon caespitosus
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 Penstemon calcareus
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 Penstemon californicus
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 Penstemon calycosus
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 Penstemon canescens
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 Penstemon cardinalis
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 Penstemon cardwellii
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 Penstemon carnosus
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 Penstemon caryi
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 Penstemon centranthifolius
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 Penstemon cinicola
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 Penstemon clevelandii
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 Penstemon clutei
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 Penstemon cobaea
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 Penstemon comarrhenus
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 Penstemon compactus
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 Penstemon concinnus
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 Penstemon confertus
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 Penstemon confusus
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 Penstemon crandallii
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 Penstemon cusickii
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 Penstemon cyananthus
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 Penstemon cyaneus
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 Penstemon cyanocaulis
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 Penstemon cyathophorus
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 Penstemon dasyphyllus
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 Penstemon davidsonii
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 Penstemon deamii
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 Penstemon deaveri
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 Penstemon debilis
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 Penstemon degeneri
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 Penstemon deustus
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 Penstemon digitalis
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 Penstemon diphyllus
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 Penstemon discolor
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 Penstemon dissectus
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 Penstemon distans
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 Penstemon dolius
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 Penstemon eatonii
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 Penstemon elegantulus
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 Penstemon ellipticus
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 Penstemon eriantherus
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 Penstemon euglaucus
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 Penstemon fendleri
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 Penstemon filiformis
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 Penstemon flavescens
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 Penstemon floribundus
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 Penstemon floridus
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 Penstemon flowersii
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 Penstemon franklinii
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 Penstemon fremontii
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 Penstemon fruticiformis
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 Penstemon fruticosus
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 Penstemon gairdneri
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 Penstemon gibbensii
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 Penstemon glaber
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 Penstemon glabrescens
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 Penstemon glandulosus
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 Penstemon glaucinus
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 Penstemon globosus
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 Penstemon goodrichii
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 Penstemon gormanii
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 Penstemon gracilentus
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 Penstemon gracilis
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 Penstemon grahamii
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 Penstemon grandiflorus
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 Penstemon griffinii
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 Penstemon grinnellii
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 Penstemon guadalupensis
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 Penstemon hallii
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 Penstemon harbourii
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 Penstemon harringtonii
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 Penstemon havardii
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 Penstemon haydenii
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 Penstemon heterodoxus
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 Penstemon heterophyllus
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 Penstemon higginsii
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 Penstemon hirsutus
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 Penstemon humilis
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 Penstemon idahoensis
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 Penstemon immanifestus
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 Penstemon incertus
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 Penstemon inflatus
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 Penstemon jamesii
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 Penstemon janishiae
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 Penstemon kingii
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 Penstemon labrosus
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 Penstemon laetus
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 Penstemon laevigatus
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 Penstemon laevis
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 Penstemon laricifolius
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 Penstemon laxiflorus
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 Penstemon laxus
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 Penstemon leiophyllus
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 Penstemon lemhiensis
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 Penstemon lentus
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 Penstemon leonardii
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 Penstemon leptanthus
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 Penstemon linarioides
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 Penstemon longiflorus
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 Penstemon lyallii
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 Penstemon marcusii
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 Penstemon mensarum
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 Penstemon metcalfei
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 Penstemon miser
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 Penstemon moffatii
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 Penstemon monoensis
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 Penstemon montanus
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 Penstemon moriahensis
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 Penstemon multiflorus
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 Penstemon murrayanus
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 Penstemon nanus
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 Penstemon navajoa
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 Penstemon neomexicanus
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 Penstemon neotericus
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 Penstemon newberryi
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 Penstemon nitidus
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 Penstemon nudiflorus
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 Penstemon oklahomensis
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 Penstemon oliganthus
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 Penstemon ophianthus
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 Penstemon osterhoutii
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 Penstemon ovatus
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 Penstemon pachyphyllus
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 Penstemon pahutensis
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 Penstemon pallidus
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 Penstemon palmeri
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 Penstemon papillatus
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 Penstemon parryi
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 Penstemon parviflorus
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 Penstemon parvus
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 Penstemon patens
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 Penstemon payettensis
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 Penstemon paysoniorum
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 Penstemon peckii
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 Penstemon penlandii
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 Penstemon pennellianus
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 Penstemon perpulcher
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 Penstemon personatus
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 Penstemon petiolatus
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 Penstemon pinifolius
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 Penstemon pinorum
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 Penstemon platyphyllus
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 Penstemon pratensis
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 Penstemon procerus
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 Penstemon pruinosus
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 Penstemon pseudoparvus
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 Penstemon pseudoputus
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 Penstemon pseudospectabilis
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 Penstemon pudicus
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 Penstemon pumilus
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 Penstemon purpusii
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 Penstemon putus
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 Penstemon radicosus
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 Penstemon ramosus
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 Penstemon rattanii
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 Penstemon retrorsus
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 Penstemon rhizomatosus
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 Penstemon richardsonii
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 Penstemon roezlii
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 Penstemon rostriflorus
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 Penstemon rubicundus
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 Penstemon rupicola
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 Penstemon rydbergii
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 Penstemon saxosorum
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 Penstemon scapoides
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 Penstemon scariosus
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 Penstemon secundiflorus
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 Penstemon seorsus
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 Penstemon sepalulus
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 Penstemon serrulatus
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 Penstemon smallii
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 Penstemon spatulatus
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 Penstemon speciosus
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 Penstemon spectabilis
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 Penstemon stenophyllus
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 Penstemon stephensii
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 Penstemon strictiformis
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 Penstemon strictus
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 Penstemon subglaber
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 Penstemon subserratus
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 Penstemon subulatus
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 Penstemon sudans
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 Penstemon superbus
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 Penstemon tenuiflorus
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 Penstemon tenuis
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 Penstemon teucrioides
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 Penstemon thompsoniae
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 Penstemon thurberi
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 Penstemon tidestromii
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 Penstemon tiehmii
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 Penstemon tracyi
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 Penstemon triflorus
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 Penstemon triphyllus
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 Penstemon tubiflorus
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 Penstemon tusharensis
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 Penstemon uintahensis
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 Penstemon unilateralis
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 Penstemon utahensis
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 Penstemon venustus
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 Penstemon versicolor
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 Penstemon virens
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 Penstemon virgatus
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 Penstemon wardii
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 Penstemon washingtonensis
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 Penstemon watsonii
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 Penstemon whippleanus
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 Penstemon wilcoxii
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 Penstemon wrightii
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 Penstemon X crideri
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 Penstemon X dubius
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 Penstemon X jonesii
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 Penstemon X mirus
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 Penstemon X parishii
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 Penstemon X peirsonii
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 Penstemon yampaensis
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Last updated January 28, 2011.
