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 bleaklyi
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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 X crideri
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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 X dubius
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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 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 X jonesii
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Penstemon kingii
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Penstemon kralii
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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 X mirus
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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 X parishii
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Penstemon parryi
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Penstemon parviflorus
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Penstemon parvulus
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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 X peirsonii
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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 yampaensis
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Last updated 12/15/2014.