Detail

Penstemon Schmidel

higherClassification: Plantae > Tracheophyta > Magnoliopsida > Lamiales > Plantaginaceae

taxonID	3171306
datasetID	7ddf754f-d193-4cc9-b351-99906754a03b
parentNameUsageID	2420
scientificName	Penstemon Schmidel
scientificNameAuthorship	Schmidel
canonicalName	Penstemon
genericName	Penstemon
taxonRank	genus
namePublishedIn	Schmidel. (1762). In: Icon. Pl., Ed. Keller, 2.
taxonomicStatus	accepted
kingdom	Plantae
phylum	Tracheophyta
class	Magnoliopsida
order	Lamiales
family	Plantaginaceae
genus	Penstemon
Child	Penstemon bolanus Straw species accepted Penstemon heterophyllus S.Watson species heterotypic synonym Penstemon torreyi Regel species doubtful Penstemon multiflorus Chapm. ex Benth., 1846 species doubtful Penstemon haydenii S.Watson ex Coult. species accepted Penstemon triphyllus Douglas species accepted Penstemon labrosus Mast., 1883 species doubtful Penstemon tubiflorus var. tubiflorus variety synonym Penstemon erianthera Fraser ex Nutt. species synonym Chelone pentstemon L. species synonym Chelone angustifolia Steud. species proparte synonym Penstemon menziesii subsp. davidsonii (Greene) Pennell & D.D.Keck subspecies synonym Penstemon coccineus Engelm. species synonym Penstemon attenuatus Douglas species accepted Penstemon procerus f. genuiculatus (Greene) L.Clark form synonym Leiostemon purpureus Raf. species doubtful Penstemon latifolius Hoffmanns. species heterotypic synonym Penstemon virens Pennell, 1917 species doubtful Penstemon cristatus Nutt. species synonym Bartramia pulchella Salisb. species synonym Penstemon wendtiorum B.L.Turner species accepted Penstemon brandegeei Porter, 1900 species accepted Penstemon crassifolius Lindl. species heterotypic synonym Chelone laevigata J.Thomps. species synonym Penstemon jamesii A.Nelson species homotypic synonym Penstemon dolius M.E.Jones species accepted Penstemon puberulus Wooton & Standl. species heterotypic synonym Chelone centranthifolia Benth. species synonym Penstemon bradburyi Pursh species accepted Penstemon pruinosus Douglas species accepted Penstemon canescens subsp. brittoniorum (Pennell) Pennell subspecies synonym Penstemon angustifolius Poir. species synonym Penstemon crandallii A.Heller species accepted Penstemon ilicifolius Nutt. ex Benth. species synonym Penstemon serrulatus Menzies ex Sm. species doubtful Penstemon isophyllus B.L.Rob. species accepted Penstemon ×hybridus hort. ex Groenl. & Rumpler species synonym Penstemon ×hybridus hort. species homotypic synonym Penstemon barbatus var. coccineus variety synonym Penstemon ×gloxinioides Purdy species accepted Penstemon strictus subsp. strictiformis (Rydb.) D.D.Keck ex Kearney & Peebles subspecies synonym Penstemon digitalis Nutt. species accepted Chelone formosa J.Thomps. species synonym Penstemon pilifer A.Heller species synonym Penstemon speciosus Douglas species accepted Penstemon micranthus Torr. species heterotypic synonym Penstemon jaliscensis B.L.Rob. species accepted Penstemon retrorsus Payson species accepted Penstemon themisteri Bailly species doubtful Chelone caerulea Spreng. species synonym Penstemon moffatii subsp. moffatii subspecies synonym Penstemon heterodoxus subsp. heterodoxus subspecies synonym Penstemon grandiflorus Fraser species synonym Penstemon minutifolius Straw species accepted Penstemon caeruleus Bailly species doubtful Penstemon acuminatus Douglas species accepted Penstemon albidus Torr. species heterotypic synonym Penstemon ovatus var. ovatus variety synonym Penstemon nelsoniae D.D.Keck & Thomps. species synonym Chelone pubescens Sweet species synonym Penstemon laevigatus Sol. species synonym Penstemon peduncularis Nutt. ex Benth. species synonym Penstemon eriantherus Fras. species doubtful Penstemon ovatus Douglas species accepted Penstemon debilis O'Kane & J.L.Anderson species accepted Chelone albida (Nutt.) Spreng. species synonym Penstemon procerus Douglas species homotypic synonym Penstemon filifolius Nutt. species homotypic synonym Penstemon laevigatus subsp. digitalis (Nutt.) R.W.Benn. subspecies synonym Elmigera barbata (Cav.) Rchb. species homotypic synonym Chelone rosea Cerv. species homotypic synonym Chelone digitalis (Nutt.) Sweet species synonym Chelone atropurpurea Sweet species synonym Penstemon retrorsoides Crosswh. species doubtful Penstemon glaber var. speciosus (Douglas) Regel variety synonym Penstemon bleaklyi O'Kane & K.D.Heil species accepted Penstemon confertus Douglas species accepted Penstemon grahamii D.D.Keck ex E.H.Graham species doubtful Chelone diffusa Hort. species synonym Penstemon gormanii f. gormanii form synonym Penstemon parishii Davidson species doubtful Chelone richardsonii Hort. species synonym Penstemon cordatus M.Martens & Galeotti species heterotypic synonym Chelone cheilanthifolia Paxton species synonym Penstemon pauciflorus Greene species synonym Penstemon brittonorum Pennell ex Beattie species synonym Penstemon eriantherus subsp. saliens (Rydb.) Pennell subspecies synonym Bartramia concinna Salisb. species synonym Penstemon menziesii subsp. thompsonii Pennell & D.D.Keck ex Abrams subspecies synonym Penstemon salmonensis N.H.Holmgren species accepted Penstemon dugesii Pérez-Calix & Zacarías species accepted Penstemon reidmoranii Zacarías & A.Wolfe species accepted Penstemon curtiflorus (D.D.Keck) N.H.Holmgren species accepted Penstemon brittanorum Pennell species homotypic synonym Penstemon australis subsp. ameles Crosswh. subspecies synonym Penstemon speciosus var. pilifer (A.Heller) Munz & I.M.Johnst. variety synonym Penstemon brittonorum Pennell ex Peattie species synonym Penstemon cyananthus subsp. longiflorus (Pennell) Neese subspecies synonym Penstemon formosus (J.Thomps.) Trautv. species heterotypic synonym Penstemon brittanorum Pennell ex Peattie species synonym Penstemon cyananthus subsp. compactus (D.D.Keck) Neese subspecies synonym Penstemon connatus Deppe ex Walp. species synonym Penstemon frankliniae S.L.Welsh species accepted Penstemon stenosepalus A.Gray species accepted Penstemon hartwegii var. hybridus Voss variety synonym Chelone cristata (Nutt.) Sreng. species synonym Penstemon laetus var. filiformis (D.D.Keck) Mc Minn variety synonym Penstemon lobbianus H.Low ex Bushell species doubtful Penstemon ×compactus Wemyss species homotypic synonym Penstemon ×princeps J.Dix species doubtful Penstemon ×compactus Wemyss ex J.Dix species doubtful Penstemon spicatus Anon. species synonym Penstemon pentstemon (L.) Mac Mill. species heterotypic synonym Penstemon fruticosus Bosse species doubtful Penstemon lobbianus H.Low species homotypic synonym Penstemon pubescens subsp. pygmaeus J.R.Duncan & V.C.Davies subspecies synonym Penstemon menziesii var. robinsonii Mast. variety synonym Penstemon arizonicus A.Heller species proparte synonym Chelone angustifolia Steud. species proparte synonym Penstemon tubiflorus Nutt. species synonym Penstemon floridus subsp. austinae (Eastw.) D.D.Keck subspecies synonym Chelone penstemon DC. species synonym Chelone ruellioides Andr. species synonym Penstemon caeruleus Torr. species synonym Penstemon fruticiformis subsp. amargosii D.D.Keck subspecies synonym Penstemon coloradoensis F.Heller species synonym Penstemon menziesii subsp. thompsoniae Pennell & D.D.Keck subspecies synonym Penstemon gracilis var. wisconsinensis (Pennell) R.W.Benn. variety synonym Penstemon pentstemon (L.) Britton species heterotypic synonym Penstemon rotundifolius A.Gray species accepted Penstemon roseus (Cerv. ex Sweet) G.Don species accepted Penstemon roezlii var. violaceus Brandegee variety synonym Penstemon rivularis Douglas ex Trautv. species synonym Penstemon riparius A.Nelson species synonym Penstemon richardsonii var. curtiflorus (D.D.Keck) Cronquist variety synonym Penstemon rex A.Nelson & J.F.Macbr. species synonym Penstemon rattanii subsp. typicus D.D.Keck subspecies synonym Penstemon puniceus var. parryi A.Gray variety synonym Penstemon punctatus Brandegee species accepted Penstemon pumilus var. thompsoniae A.Gray variety synonym Penstemon pumilus var. incanus A.Gray variety synonym Penstemon pubescens var. multiflorus Benth. variety synonym Penstemon pubescens var. latifolia Aiton variety synonym Penstemon pubescens var. gracilis (Nutt.) A.Gray variety synonym Penstemon pubescens var. angustifolius Aiton variety synonym Penstemon puberulus M.E.Jones species heterotypic synonym Penstemon pseudospectabilis subsp. typicus D.D.Keck subspecies synonym Penstemon pseudospectabilis subsp. clutei (A.Nelson) D.D.Keck subspecies synonym Penstemon pseudospectabilis subsp. bicolor (Brandegee) D.D.Keck subspecies synonym Penstemon pseudohumilis M.E.Jones species heterotypic synonym Penstemon productus Greene species synonym Penstemon procerus subsp. typicus D.D.Keck subspecies synonym Penstemon procerus subsp. pulvereus Pennell subspecies synonym Penstemon procerus var. micrantus (Nutt.) M.E.Jones variety synonym Penstemon procerus f. jenkinsii B.Boivin form synonym Penstemon procerus f. geniculatus (Greene) Smiley form synonym Penstemon procerus var. fimbriatus Regel variety synonym Penstemon procerus f. albescens B.Boivin form synonym Penstemon pringlei S.Watson species synonym Penstemon potosinus Straw species accepted Penstemon plagapineus Straw species accepted Penstemon pinetorum (Piper) Piper species synonym Penstemon pilosigulatus A.Nelson species synonym Penstemon pickettii H.St.John species synonym Penstemon phlogifolius Greene species synonym Penstemon perpulcher var. pandus A.Nelson & J.F.Macbr. variety synonym Penstemon perfoliatus Brongn. species accepted Penstemon pentstemon (L.) MacMill. species synonym Penstemon peduncularis Nutt. ex A.DC. species synonym Penstemon paysonii Pennell species synonym Penstemon parvulus (A.Gray) Krautter species accepted Leiostemon ambiguus (Torr.) Greene species synonym Penstemon pandus (A.Nelson & J.F.Macbr.) A.Nelson & J.F.Macbr. species synonym Penstemon palmeri subsp. typicus D.D.Keck subspecies synonym Penstemon palmeri var. grinnellii (Eastw.) Munz & I.M.Johnst. variety synonym Penstemon palmeri var. bicolor Brandegee variety synonym Penstemon pallescens Osterh. species synonym Penstemon pachyphyllus var. mucronatus (N.H.Holmgren) Neese variety synonym Penstemon oregonensis A.Murray bis species doubtful Penstemon occiduus Straw species accepted Penstemon nuttallii L.C.Beck species synonym Penstemon nitidus subsp. typicus Pennell subspecies synonym Penstemon nitidus var. major Benth. variety synonym Penstemon newberryi var. rupicola Piper variety synonym Penstemon newberryi f. humilior Sealy form synonym Penstemon mucronatus N.H.Holmgren species accepted Penstemon ×moronensis Crosswh. species accepted Penstemon mohinoranus Straw species accepted Penstemon moffatii subsp. typicus D.D.Keck subspecies synonym Penstemon minor (A.Gray) D.D.Keck species synonym Penstemon micranthus Nutt. species heterotypic synonym Penstemon metcalfei Wooton & Standl. species accepted Penstemon menziesii var. peduncularis (Nutt. ex Benth.) Schelle variety synonym Penstemon menziesii f. newberryi (A.Gray) Voss form synonym Penstemon menziesii var. lyallii A.Gray variety synonym Penstemon menziesii var. lewisii (Benth.) A.Gray variety synonym Penstemon menziesii var. davidsonii (Greene) Piper variety homotypic synonym Penstemon menziesii var. crassifolius (Lindl.) Schelle variety synonym Penstemon mackayanus Knowles & Westc. species synonym Penstemon macbridei A.Nelson species synonym Penstemon lyallii var. linearifolius (J.M.Coult. & Fisher) Krautter variety synonym Penstemon luteus G.L.Nesom species accepted Penstemon longifolius Scheele species synonym Penstemon lineolatus Greene species synonym Penstemon linearifolius J.M.Coult. & Fisher species synonym Penstemon linarioides subsp. typicus D.D.Keck subspecies synonym Penstemon linarioides var. seorsus A.Nelson variety synonym Penstemon linarioides subsp. compactifolius D.D.Keck subspecies synonym Penstemon linarioides var. californicus Munz & I.M.Johnst. variety synonym Penstemon lewisii Benth. species synonym Penstemon leucanthus Greene species synonym Penstemon leptophyllus Rydb. species synonym Penstemon leonensis Straw species accepted Penstemon latiusculus Greene species synonym Penstemon latifolius (S.Watson) Krautter species heterotypic synonym Penstemon lassenianus Greene species synonym Penstemon laricifolius subsp. typicus D.D.Keck subspecies synonym Penstemon laevigatus var. canescens Britton variety synonym Penstemon laevigatus var. angustus Benn. variety synonym Penstemon laetus subsp. typicus D.D.Keck subspecies synonym Penstemon laetus var. filiformis (D.D.Keck) McMinn variety synonym Penstemon laetus f. albus P.C.Everett form synonym Penstemon lacerellus Greene species synonym Penstemon kunthii G.Don species synonym Penstemon kingii var. glaucus Kellogg variety synonym Penstemon kennedyi A.Nelson species synonym Penstemon jeffreyanus A.Murray bis species synonym Penstemon jaffrayanus var. parvulus (A.Gray) Jeps. variety synonym Penstemon interruptus Greene species doubtful Penstemon inermis (Poir.) Poir. species synonym Penstemon incanus (A.Gray) Tidestr. species synonym Penstemon imberbis (Kunth) Trautv. species accepted Penstemon ilicifolius Nutt. ex DC. species synonym Penstemon hybridus Voss species accepted Penstemon humilis subsp. typicus D.D.Keck subspecies synonym Penstemon humboldtii G.Don species synonym Penstemon hirsutus f. albiflorus Farw. form synonym Penstemon hidalgensis Straw species accepted Penstemon hians (Piper) I.M.Johnst. species synonym Penstemon heterophyllus subsp. typicus D.D.Keck subspecies synonym Penstemon heterophyllus var. latifolius S.Watson variety heterotypic synonym Penstemon heterophyllus var. azureus (Benth.) Jeps. variety synonym Penstemon heterodoxus subsp. typicus D.D.Keck subspecies synonym Penstemon hesperius M.E.Peck species accepted Penstemon henricksonii Straw species accepted Penstemon hansonii A.Nelson species synonym Penstemon hallii var. arizonicus A.Gray variety synonym Penstemon guadalupensis subsp. typicus Pennell subspecies synonym Penstemon grinnellii var. scrophularioides (M.E.Jones) N.H.Holmgren variety synonym Penstemon gracilis var. wisconsinensis (Pennell) Fassett variety synonym Penstemon gracilis f. scoggannii B.Boivin form synonym Penstemon gracilentus var. ursorum Jeps. variety synonym Penstemon gordonianus A.Gray species synonym Penstemon glaucus var. stenosepalus A.Gray variety synonym Penstemon glaucophyllus Scheele species synonym Penstemon glaucifolius A.Gray species synonym Penstemon glastifolius Greene species synonym Penstemon glaberrimus Bevis ex W.H.Baxter species doubtful Penstemon glaber var. wardii (A.Gray) M.E.Jones variety synonym Penstemon glaber var. utahensis S.Watson variety synonym Penstemon glaber var. stenosepalus Regel variety synonym Penstemon glaber var. occidentalis A.Gray variety synonym Penstemon glaber var. fremontii (Torr. & A.Gray) M.E.Jones variety synonym Penstemon glaber f. cyananthus (Hook.) Voss form synonym Penstemon giganteus C.Morren species synonym Penstemon gentryi Standl. species accepted Penstemon gentianoides (Kunth) Poir. species accepted Penstemon geniculatus Greene species synonym Penstemon galloensis G.L.Nesom species accepted Penstemon gairdneri subsp. typicus D.D.Keck subspecies synonym Penstemon gairdneri var. hians Piper variety synonym Penstemon fruticosus var. crassifolius (Lindl.) Krautter variety synonym Penstemon fruticosus subsp. cardwellii (Howell) Piper subspecies synonym Penstemon fruticiformis subsp. typicus D.D.Keck subspecies synonym Penstemon fruticiformis var. spiciformis Jeps. variety synonym Penstemon fruticiformis var. incertus (Brandegee) Munz & I.M.Johnst. variety synonym Penstemon fremontii var. glabrescens Dorn & Lichvar variety synonym Penstemon fremontii var. parryi A.Gray ex S.Watson variety synonym Penstemon floridus subsp. typicus D.D.Keck subspecies synonym Penstemon flaviflorus M.E.Jones species synonym Penstemon filisepalis Straw species accepted Penstemon filifolius Nutt. ex Benth. species synonym Penstemon fasciculatus A.Gray species accepted Penstemon eximius D.D.Keck species accepted Penstemon erosus Rydb. species synonym Penstemon eriantherus var. saliens (Rydb.) Pennell variety synonym Penstemon eriantherus var. grandis Pennell & D.D.Keck variety synonym Penstemon elegans Poir. species synonym Penstemon ×edithae English species doubtful Penstemon eastwoodiae A.Heller species synonym Penstemon duchesnensis (N.H.Holmgren) Neese species accepted Penstemon dolius var. duchesnensis N.H.Holmgren variety synonym Penstemon divergens M.E.Jones species synonym Penstemon dimorphus Kuntze species doubtful Penstemon digitalis var. pubescens (Aiton) Trautv. variety synonym Penstemon digitalis var. multiflorus (Benth.) Chapm., 1860 variety synonym Penstemon digitalis var. laevigatus (Aiton) Trautv. variety homotypic synonym Penstemon digitalis var. gracilis (Nutt.) Trautv. variety synonym Penstemon digitalis var. glaucus (Graham) Trautv. variety synonym Penstemon digitalis f. baueri Steyerm. form synonym Penstemon digitalis var. attenuatus (Douglas) Trautv. variety synonym Penstemon digitalis var. albidus Trautv. variety synonym Penstemon diffusus f. albiflorus Hardin form synonym Penstemon deustus subsp. typicus D.D.Keck subspecies synonym Penstemon deustus var. savagei L.F.Hend. variety synonym Penstemon deustus var. arenarius (Greene) Jeps. variety synonym Penstemon desertorum M.E.Jones species synonym Penstemon deserticola Piper species synonym Penstemon depressus Greene species synonym Penstemon decurvus Pennell ex Crosswh. species synonym Penstemon cristatus Fraser species synonym Penstemon crassulus Wooton & Standl. species synonym Penstemon crassifolius Shuttlew. ex Benth. species synonym Penstemon crandallii subsp. typicus D.D.Keck subspecies synonym Penstemon connatus Deppe species synonym Penstemon confusus subsp. typicus D.D.Keck subspecies synonym Penstemon confertus var. violaceus Trautv. variety synonym Penstemon confertus var. rigidus Jeps. variety synonym Penstemon confertus var. procerus (Douglas ex Graham) Coville variety synonym Penstemon confertus var. globosus Piper variety synonym Penstemon confertus var. geniculatus (Greene) Jeps. variety synonym Penstemon colvillii C.Huber species doubtful Penstemon collinus A.Nelson species synonym Penstemon coeruleus Nutt. species doubtful Penstemon coccineus var. filifolius A.Gray variety synonym Penstemon clevelandii subsp. typicus D.D.Keck subspecies synonym Penstemon clevelandii var. angelicus I.M.Johnst. variety synonym Penstemon clevelandii var. stephensii (Brandegee) Munz & I.M.Johnst. variety synonym Penstemon cinereus subsp. foliatus D.D.Keck subspecies synonym Penstemon chionophilus Greene species doubtful Penstemon cerrosensis Kellogg species homotypic synonym Penstemon cephalanthus Pennell species synonym Penstemon cedrosensis Krautter species accepted Penstemon canescens f. villicaulis Fernald form synonym Penstemon campanulatus f. roseus (G.Don) Voss form synonym Penstemon caespitosus subsp. typicus D.D.Keck subspecies synonym Penstemon caespitosus var. thompsoniae (A.Gray) A.Nelson variety synonym Penstemon caeruleus Nutt. species synonym Penstemon caelestinus Pennell species synonym Penstemon ×bryantae D.D.Keck, 1937 species accepted Penstemon brittonoruro Pennell ex Peattie species doubtful Penstemon brittonorum Pennell species synonym Penstemon bridgesii var. rostriflorus (Kellogg) Schelle variety synonym Penstemon brevisepalus f. heterolasius Fernald form synonym Penstemon brevis A.Nelson species doubtful Penstemon brevilabris A.Gray species synonym Penstemon bolanius Straw species accepted Penstemon bicolor subsp. typicus Clokey & D.D.Keck subspecies synonym Penstemon bicolor subsp. roseus Clokey & D.D.Keck subspecies synonym Penstemon barbatus var. wislizeni A.Gray variety synonym Penstemon barbatus var. puberulus A.Gray variety synonym Penstemon barbatus var. labrosus A.Gray variety synonym Penstemon barbatus f. flaviflorus (M.E.Jones) Pennell form synonym Penstemon barbatus var. carneus Lindl. variety synonym Penstemon bakeri Greene species synonym Penstemon baccharifolius var. schaffneri Hemsl. variety synonym Penstemon azureus subsp. typicus D.D.Keck subspecies synonym Penstemon azureus subsp. parvulus (A.Gray) D.D.Keck subspecies synonym Penstemon azureus f. jaffrayanus (Hook.) Voss, 1894 form synonym Penstemon azureus var. ambiguus A.Gray variety synonym Penstemon australis f. odontophyllus Fernald form synonym Penstemon auricomus A.Nelson ex Rydb. species doubtful Penstemon attenuatus var. varians A.Nelson variety synonym Penstemon attenuatus subsp. typicus D.D.Keck subspecies synonym Penstemon attenuatus f. multicolor Pennell form synonym Penstemon attenuatus var. hyacinthinus (Pennell) M.Peck variety synonym Penstemon attenuatus var. glabratus G.N.Jones variety synonym Penstemon atropurpureus (Sweet) G.Don species accepted Penstemon arizonicus A.Heller species proparte synonym Penstemon argutus Paxton species synonym Penstemon angelicus (I.M.Johnst.) Moran species accepted Penstemon amplus A.Nelson species synonym Penstemon amplexicaulis Buckley species heterotypic synonym Penstemon amphorellae Crosswh. species accepted Penstemon amoenus Kunze species synonym Penstemon ambiguus var. thurberi (Torr.) A.Gray variety synonym Penstemon ambiguus var. foliosus Benth. variety synonym Penstemon amabilis G.N.Jones species doubtful Penstemon alsinoides Greene species doubtful Penstemon alpinus f. riparius (A.Nelson) Pennell form synonym Penstemon albrightii A.Nelson & J.F.Macbr. species doubtful Penstemon adamsianus Howell species doubtful Penstemon acuminatus var. fendleri M.E.Jones variety synonym Penstemon aboriginum M.E.Jones species heterotypic synonym Penstemon aboriginium M.E.Jones species heterotypic synonym Lepteiris parviflora Raf. species synonym Leiostemon thurberi (Torr.) Greene species synonym Apentostera secundiflora Raf. species synonym Elmigera barbata (Cav.) Rchb. ex Steud. species synonym Penstemon pseudoputus (Crosswh.) N.H.Holmgren species accepted Penstemon virgatus subsp. pseudoputus Crosswh. subspecies synonym Penstemon pseudospectabilis M.E.Jones species accepted Penstemon navajoa N.H.Holmgren species accepted Penstemon humilis Nutt. ex A.Gray species accepted Penstemon arenicola A.Nelson species accepted Penstemon idahoensis N.D.Atwood & S.L.Welsh species accepted Penstemon heterophyllus Lindl. species accepted Penstemon azureus Benth. species accepted Penstemon venustus Douglas ex Lindl. species doubtful Penstemon tracyi D.D.Keck species accepted Penstemon discolor D.D.Keck species accepted Penstemon pruinosus Douglas ex Lindl. species doubtful Penstemon procerus Douglas ex Graham species accepted Penstemon nanus D.D.Keck species accepted Penstemon haydenii S.Watson species doubtful Penstemon arenarius Greene species accepted Penstemon maguirei Crosswh. species synonym Penstemon aridus Rydb. species accepted Penstemon tiehmii N.H.Holmgren species accepted Penstemon unilateralis Rydb. species accepted Penstemon ×dubius Davidson species accepted Penstemon diphyllus Rydb. species accepted Penstemon triphyllus subsp. diphyllus (Rydb.) D.D.Keck subspecies synonym Penstemon platyphyllus Rydb. species accepted Penstemon penlandii W.A.Weber species accepted Penstemon murrayanus Hook. species accepted Penstemon harvardii A.Gray species synonym Penstemon angustifolius Nutt. ex Pursh species accepted Penstemon heterodoxus A.Gray species accepted Penstemon albidus Nutt. species accepted Penstemon roezlii Regel species accepted Penstemon cinerascens Greene ex C.F.Baker species synonym Penstemon laetus var. roezlii (Regel) Jeps. variety synonym Penstemon uintahensis Pennell species accepted Penstemon tenuis Small species accepted Penstemon pratensis Greene species accepted Penstemon cardinalis Wooton & Standl. species accepted Penstemon franklinii S.L.Welsh species accepted Penstemon multiflorus (Benth.) Chapm. ex Small species accepted Penstemon anguineus Eastw. species accepted Penstemon rattanii var. minor A.Gray variety synonym Penstemon guadalupensis A.Heller species accepted Penstemon guadalupensis var. ernstii (Pennell) Cory variety synonym Penstemon rhizomatosus N.H.Holmgren species accepted Penstemon tusharensis N.H.Holmgren species synonym Penstemon caespitosus var. suffruticosus A.Gray variety synonym Penstemon tenuiflorus Pennell species accepted Penstemon digitalis Nutt. ex Sims species synonym Penstemon laevigatus var. angulatus Benn. variety synonym Penstemon pinifolius Greene species accepted Penstemon peckii Pennell species accepted Penstemon canescens (Britton) Britton species accepted Penstemon canescens var. typicus Pennell variety synonym Penstemon canescens var. brittoniorum (Pennell) Pennell variety synonym Penstemon brittoniorum Pennell species synonym Penstemon harbourii A.Gray species accepted Penstemon compactus (D.D.Keck) Crosswh. species accepted Penstemon cyananthus var. compactus (D.D.Keck) Neese variety synonym Penstemon ramosus Crosswh. species synonym Penstemon lanceolatus Benth. species accepted Penstemon grinnellii Eastw. species accepted Penstemon triphyllus Douglas ex Lindl. species doubtful Penstemon superbus A.Nelson species accepted Penstemon petiolatus Brandegee species accepted Penstemon patens (M.E.Jones) N.H.Holmgren species accepted Penstemon confusus subsp. patens (M.E.Jones) D.D.Keck subspecies synonym Penstemon buckleyi Pennell species accepted Penstemon calycosus Small species accepted Penstemon laevigatus subsp. calycosus (Small) R.W.Benn. subspecies synonym Penstemon murcronatus N.H.Holmgren species synonym Penstemon hallii A.Gray species accepted Penstemon clevelandii A.Gray species accepted Penstemon leptanthus Pennell species synonym Penstemon grandiflorus Nutt. species heterotypic synonym Penstemon deustus Douglas ex Lindl. species doubtful Penstemon personatus D.D.Keck species accepted Penstemon parryi A.Gray species accepted Penstemon caespitosus Nutt. ex A.Gray species accepted Penstemon californicus (Munz & L M.Johnst.) D.D.Keck species accepted Penstemon moriahensis N.H.Holmgren species accepted Penstemon grahamii D.D.Keck species accepted Penstemon albomarginalis M.E.Jones species synonym Penstemon longiflorus (Pennell) S.L.Clark species accepted Penstemon cyananthus subsp. longiflorus Pennell subspecies synonym Penstemon triflorus A.Heller species accepted Penstemon subulatus M.E.Jones species accepted Penstemon degeneri Crosswh. species accepted Penstemon hartwegii Benth. species accepted Penstemon perpulcher A.Nelson species accepted Penstemon minidokanus A.Nelson & J.F.Macbr. species synonym Penstemon palmeri A.Gray species accepted Penstemon thurberi Torr. species accepted Penstemon thurberi var. anestius Reveal & Beatley variety synonym Penstemon ×bryantiae D.D.Keck species accepted Penstemon sudans M.E.Jones species accepted Penstemon deustus subsp. sudans (M.E.Jones) Pennell & D.D.Keck subspecies synonym Penstemon calcareus Brandegee species accepted Penstemon monoensis A.Heller species accepted Penstemon glaber Pursh species accepted Penstemon ovatus Douglas ex Hook. species doubtful Penstemon albertinus Greene species accepted Penstemon gracilis Nutt. species accepted Penstemon tidestromii Pennell species accepted Penstemon subserratus Pennell species accepted Penstemon deaveri Crosswh. species accepted Penstemon virgatus subsp. arizonicus (A.Gray) D.D.Keck subspecies synonym Penstemon pennellianus D.D.Keck species accepted Penstemon osterhoutii Pennell species accepted Penstemon strictiformis Rydb. species accepted Penstemon strictus subsp. strictiformis (Rydb.) D.D.Keck subspecies synonym Penstemon moffattii Eastw. species accepted Penstemon gairdneri Hook. species accepted Penstemon alamosensis Pennell & Nisbet species accepted Penstemon gracilentus A.Gray species accepted Penstemon thompsoniae (A.Gray) Rydb. species accepted Penstemon subglaber Rydb. species accepted Penstemon alluviorum Pennell species synonym Penstemon laevigatus subsp. alluviorum (Pennell) R.W.Benn. subspecies synonym Penstemon davidsonii Greene species accepted Penstemon paysoniorum D.D.Keck species accepted Penstemon nitidus Douglas ex Benth. species accepted Penstemon rostriflorus Kellogg species accepted Penstemon bridgesii A.Gray species synonym Penstemon bridgesii var. amplexicaulis Monnet variety synonym Penstemon ×mirus A.Nelson species accepted Penstemon absarokensis Evert species accepted Penstemon gormanii Greene species accepted Penstemon teucrioides Greene species accepted Penstemon ambiguus Torr. species accepted Penstemon dasyphyllus A.Gray species accepted Penstemon payettensis A.Nelson & J.F.Macbr. species accepted Penstemon newberryi A.Gray species accepted Penstemon retrorsus Payson ex Pennell species doubtful Penstemon acuminatus Douglas ex Lindl. species doubtful Penstemon goodrichii N.H.Holmgren species accepted Penstemon stephensii Brandegee species accepted Penstemon cyathophorus Rydb. species accepted Penstemon parvus Pennell species accepted Penstemon montanus Greene species accepted Penstemon pseudoparvus Crosswh. species accepted Penstemon marcusii (D.D.Keck) N.H.Holmgren species accepted Penstemon moffatii subsp. marcusii D.D.Keck subspecies synonym Penstemon floridus Brandegee species accepted Penstemon acaulis L.O.Williams species accepted Penstemon globosus (Piper) Pennell & D.D.Keck species accepted Penstemon spectabilis Thurb. ex Torr. & A.Gray species accepted Penstemon strictus Benth. species accepted Penstemon strictus subsp. angustus Pennell subspecies synonym Penstemon cyanocaulis Payson species accepted Penstemon parviflorus Pennell species synonym Penstemon miser A.Gray species accepted Penstemon albomarginatus M.E.Jones species accepted Penstemon pinorum L.M.Shultz & J.S.Shultz species accepted Penstemon eriantherus Pursh species accepted Penstemon abietinus Pennell species accepted Penstemon glaucinus Pennell species accepted Penstemon spatulatus Pennell species accepted Penstemon stenophyllus A.Gray species accepted Penstemon ×parishii A.Gray species accepted Penstemon ammophilus N.H.Holmgren & L.M.Schultz species accepted Penstemon ophianthus Pennell species accepted Penstemon jamesii subsp. ophianthus (Pennell) D.D.Keck subspecies synonym Penstemon linarioides A.Gray species accepted Penstemon eatonii A.Gray species accepted Penstemon yampaensis Penland species accepted Penstemon acaulis var. yampaensis (Penland) Neese variety synonym Penstemon glandulosus Douglas species doubtful Penstemon serrulatus Menzies ex Rees species doubtful Penstemon mensarum Pennell species accepted Penstemon breviculus (D.D.Keck) Nisbet & R.C.Jacks. species accepted Penstemon jamesii subsp. breviculus D.D.Keck subspecies synonym Penstemon lemhiensis (D.D.Keck) D.D.Keck & Cronquist species accepted Penstemon speciosus subsp. lemhiensis D.D.Keck subspecies synonym Penstemon deamii Pennell species accepted Penstemon laevigatus var. deamii (Pennell) R.W.Benn. variety synonym Penstemon wrightii Hook. species accepted Penstemon fruticosus (Pursh) Greene species accepted Penstemon seorsus (A.Nelson) D.D.Keck species accepted Penstemon speciosus Douglas ex Lindl. species doubtful Penstemon speciosus subsp. kennedyi (A.Nelson) D.D.Keck subspecies synonym Penstemon cyananthus Hook. species accepted Penstemon papillatus J.T.Howell species accepted Penstemon leonardii Rydb. species accepted Penstemon bicolor (Brandegee) Clokey & D.D.Keck species accepted Penstemon leiophyllus Pennell species accepted Penstemon cyaneus Pennell species accepted Penstemon wilcoxii Rydb. species accepted Penstemon ovatus var. pinetorum Piper variety synonym Penstemon fruticiformis Coville species accepted Penstemon secundiflorus Benth. species accepted Penstemon smallii A.Heller species accepted Penstemon cusickii A.Gray species accepted Penstemon pallidus Small species accepted Penstemon arkansanus var. pubescens Pennell variety synonym Penstemon brevisepalus Pennell species accepted Penstemon lentus Pennell species accepted Penstemon barrettiae A.Gray species accepted Penstemon laxiflorus Pennell species accepted Penstemon australis var. ameles Crosswh. variety synonym Penstemon australis subsp. laxiflorus (Pennell) R.W.Benn. subspecies synonym Penstemon confusus M.E.Jones species accepted Penstemon whippleanus A.Gray species accepted Penstemon fremontii Torr. & A.Gray species accepted Penstemon ×crideri A.Nelson species accepted Penstemon pahutensis N.H.Holmgren species accepted Penstemon laxus A.Nelson species accepted Penstemon watsonii subsp. laxus (A.Nelson) D.D.Keck subspecies synonym Penstemon barnebyi N.H.Holmgren species accepted Penstemon laricifolius Hook. & Arn. species accepted Penstemon sepalulus A.Nelson species accepted Penstemon crandallii A.Nelson species doubtful Penstemon pachyphyllus A.Gray ex Rydb. species accepted Penstemon laevis Pennell species accepted Penstemon ×jonesii Pennell species accepted Penstemon cobaea Nutt. species accepted Penstemon cobaea subsp. typicus Pennell subspecies synonym Penstemon watsonii A.Gray species accepted Penstemon flavescens Pennell species accepted Penstemon rydbergii A.Nelson species accepted Penstemon scariosus Pennell species accepted Penstemon confertus Douglas ex Lindl. species doubtful Penstemon ×peirsonii Munz & I.M.Johnst. species accepted Penstemon distans N.H.Holmgren species accepted Penstemon baccharifolius Hook. species accepted Penstemon laevigatus Aiton species accepted Penstemon penstemon (L.) Britton species synonym Penstemon cleavelandii A.Gray species synonym Penstemon washingtonensis D.D.Keck species accepted Penstemon filiformis (D.D.Keck) D.D.Keck species accepted Penstemon rupicola (Piper) Howell species accepted Penstemon scapoides D.D.Keck species accepted Penstemon concinnus D.D.Keck species accepted Penstemon oliganthus Wooton & Standl. species accepted Penstemon laetus A.Gray species accepted Penstemon floribundus Danley species accepted Penstemon australis Small species accepted Penstemon labrosus (A.Gray) Mast. ex Hook.fil. species accepted Penstemon centranthifolius (Benth.) Benth. species accepted Penstemon fendleri Torr. & A.Gray species accepted Penstemon rubicundus D.D.Keck species accepted Penstemon saxosorum Pennell species accepted Penstemon comarrhenus A.Gray species accepted Penstemon oklahomensis Pennell species accepted Penstemon kingii S.Watson species accepted Penstemon nyeensis Crosswh. species synonym Penstemon flowersii Neese & S.L.Welsh species accepted Penstemon auriberbis Pennell species accepted Penstemon wardii A.Gray species accepted Penstemon euglaucus English species accepted Penstemon retrosus Payson ex Pennell species synonym Penstemon richardsonii Douglas ex Lindl. species doubtful Penstemon barbatus (Cav.) Roth species accepted Penstemon clutei A.Nelson species accepted Penstemon nudiflorus A.Gray species accepted Penstemon atwoodii S.L.Welsh species accepted Penstemon janishiae N.H.Holmgren species accepted Penstemon caryi Pennell species accepted Penstemon ellipticus Coult. & Fisher species accepted Penstemon davidsonii var. ellipticus (J.M.Coult. & Fisher) B.Boivin variety synonym Penstemon radicosus A.Nelson species accepted Penstemon rattanii A.Gray species accepted Penstemon cinicola D.D.Keck species accepted Penstemon neotericus D.D.Keck species accepted Penstemon campanulatus (Cav.) Willd. species accepted Penstemon attenuatus Douglas ex Lindl. species doubtful Penstemon inflatus Crosswh. species accepted Penstemon griffinii A.Nelson species accepted Penstemon incertus Brandegee species accepted Penstemon carnosus Pennell species accepted Penstemon virgatus A.Gray species accepted Penstemon elegantulus Pennell species accepted Penstemon purpusii Brandegee species accepted Penstemon putus A.Nelson species accepted Penstemon virgatus subsp. putus (A.Nelson) Crosswh. subspecies synonym Penstemon cardwellii Howell species accepted Penstemon neomexicanus Wooton & Standl. species accepted Penstemon gibbensii Dorn species accepted Penstemon harringtonii Penland species accepted Penstemon immanifestus N.H.Holmgren species accepted Penstemon caesius A.Gray species accepted Penstemon utahensis Eastw. species accepted Penstemon dolius M.E.Jones ex Pennell species doubtful Penstemon pudicus Reveal & Beatley species accepted Penstemon pumilus Nutt. species accepted Penstemon jamesii Benth. species accepted Penstemon jamesii subsp. typicus D.D.Keck subspecies synonym Penstemon brevibarbatus Crosswh. species accepted Penstemon arkansanus Pennell species accepted Penstemon multicaulis Pennell species synonym Penstemon pallidus subsp. arkansanus (Pennell) R.W.Benn. subspecies synonym Penstemon wherryi Pennell species synonym Penstemon havardii A.Gray species accepted Penstemon hirsutus (L.) Willd. species accepted Penstemon hirsutus var. minimus Benn. variety synonym Penstemon hirsutus var. pygmaeus Benn. variety synonym Penstemon bracteatus D.D.Keck species accepted Penstemon virens Pennell ex Rydb. species accepted Penstemon tubiflorus species accepted Penstemon dissectus Elliott species accepted Penstemon tubaeflorus Nutt. species accepted Penstemon tubaeflorus var. tubaeflorus variety synonym Penstemon truncatus Pennell species synonym Penstemon speciosus subsp. speciosus subspecies synonym Penstemon shantzii A.Nelson species synonym Penstemon rattanii subsp. rattanii subspecies synonym Penstemon puniceus A.Gray species heterotypic synonym Penstemon pubescens Aiton species synonym Penstemon procerus f. procerus form synonym Penstemon miniatus Lindl. species accepted Penstemon lyalli (A.Gray) A.Gray species accepted Penstemon jaffrayanus Hook. species synonym Penstemon gairdneri subsp. gairdneri subspecies synonym Penstemon fruticosus subsp. fruticosus subspecies synonym Penstemon floridus subsp. floridus subspecies synonym Penstemon diffusus Douglas species synonym Penstemon deustus subsp. deustus subspecies synonym Penstemon coccineus Hoffmanns., 1842 species accepted Penstemon cinereus subsp. cinereus subspecies synonym Penstemon canescens f. canescens form synonym Penstemon brevisepalus f. brevisepalus form synonym Penstemon attenuatus subsp. attenuatus subspecies synonym Chelone laevigata Pers. species synonym Penstemon amplexicaulis Moench species heterotypic synonym Penstemon virgatus var. arizonicus (A.Gray) D.D.Keck variety synonym Penstemon gentianoides Lindl. species heterotypic synonym Penstemon coeruleus Torr. species synonym Penstemon guadalupensis subsp. ernestii Pennell subspecies synonym Penstemon angustifolius Nutt., 1813 species doubtful Penstemon glandulosus Douglas ex Lindl. species accepted Chelone inermis Poir. species synonym Penstemon peduncularis Nutt. species homotypic synonym Penstemon carnosus Pennell ex E.H.Graham, 1937 species doubtful Penstemon cedrosensis Kellogg species doubtful Penstemon kralii D.Estes species accepted Chelone rosea Cerv. ex Sweet species synonym Penstemon chionophilus Greene ex C.F.Baker species doubtful Penstemon calcareus M.E.Jones species heterotypic synonym Penstemon bachimbensis Straw species doubtful Penstemon gracilis var. gracilis variety synonym Chelone gracilis (Nutt.) Spreng. species synonym Penstemon diffusus Douglas ex Lindl. species synonym Penstemon canescens f. brittoniorum (Pennell) Fernald form synonym Chelone pubescens (Aiton) J.Parm. species synonym Penstemon gordonii Hook. species synonym Chelone imberbis Kunth species synonym Penstemon deustus Douglas species accepted Penstemon caeruleus E.Vilm. species synonym Penstemon cyananthus subsp. compactus D.D.Keck subspecies synonym Penstemon cyananthus var. longiflorus (Pennell) Neese variety synonym Penstemon laetus subsp. roezlii (Regel) D.D.Keck subspecies synonym Penstemon jamesii var. jamesii variety synonym Penstemon humilis var. deserticus S.L.Welsh variety synonym Penstemon strictus var. strictus variety synonym Penstemon azureus f. jeffreyanus (Hook.) Voss form synonym Penstemon grandiflorus F.Dietr. species heterotypic synonym Penstemon pononii Anon. species synonym Penstemon digitalis var. latifolius Regel variety synonym Chelone penstemon L. species synonym Penstemon ×macewanii Paxton species doubtful Penstemon teretiflorus Fraser ex Nutt. species synonym Penstemon serrulatus Menzies species accepted Chelone grandiflora Spreng. species synonym Penstemon glandulosus subsp. glandulosus subspecies synonym Penstemon moffattii subsp. paysonii (Pennell) D.D.Keck subspecies synonym Penstemon richardsonii Douglas species accepted Penstemon centranthifolius S.Watson species heterotypic synonym Penstemon cinerascens Greene species synonym Penstemon dolius var. dolius variety synonym Penstemon glaberrimus Bevis species homotypic synonym Penstemon decurvus Pennell species homotypic synonym Penstemon humilis Nutt. species homotypic synonym Penstemon fremontii var. parryi A.Gray variety homotypic synonym Penstemon brittonoruro Pennell species homotypic synonym Penstemon spectabilis Thurb. species homotypic synonym Penstemon retrosus Payson species homotypic synonym Penstemon pachyphyllus A.Gray species homotypic synonym Penstemon ilicifolius Nutt. species homotypic synonym Penstemon glaber f. speciosus (Douglas) Voss form synonym Penstemon spathulatus Eastw. species homotypic synonym Penstemon crassifolius Shuttlew. species homotypic synonym Penstemon nitidus Douglas species homotypic synonym Penstemon confertus var. attenuatus M.E.Jones variety synonym Penstemon suffruticosus Douglas species homotypic synonym Penstemon caespitosus Nutt. species homotypic synonym Penstemon rivularis Douglas species homotypic synonym Penstemon multiflorus (Benth.) Chapm. species homotypic synonym Paederota cochlearifolia J.Koenig species homotypic synonym Penstemon luculentus R.L.Johnson & M.R.Stevens species accepted Penstemon menziesii Hook. species synonym Chelone erianthera (Nutt. ex Pursh) Steud. species synonym Penstemon venustus Douglas species accepted Penstemon puniceus Lilja species heterotypic synonym Chelone bradburyi (Pursh) Steud. species synonym Penstemon utahensis (S.Watson) A.Nelson species heterotypic synonym Penstemon guadalupensis var. ernestii (Pennell) Cory variety synonym Penstemon auricomus A.Nelson species doubtful Chelone formosa J.C.Wendl. species synonym Penstemon speciosus var. speciosus variety synonym Chelone hirsuta L. species synonym Chelone gentianoides Kunth species synonym Gerardia fruticosa Pursh species synonym Penstemon thompsoniae subsp. thompsoniae subspecies synonym Penstemon spectabilis subsp. spectabilis subspecies synonym Penstemon richardsonii subsp. curtiflorus D.D.Keck subspecies synonym Penstemon newberryi subsp. newberryi subspecies synonym Penstemon menziesii var. newberryi (A.Gray) A.Gray variety synonym Penstemon menziesii f. davidsonii (Greene) G.N.Jones form synonym Penstemon menziesii subsp. davidsonii (Greene) Piper subspecies synonym Penstemon laevigatus var. digitalis (Nutt.) A.Gray variety synonym Penstemon laevigatus var. calycosus (Small) Farw. variety synonym Penstemon laetus subsp. laetus subspecies synonym Penstemon laetus subsp. filiformis D.D.Keck subspecies synonym Penstemon heterophyllus subsp. heterophyllus subspecies synonym Penstemon grinnellii var. grinnellii variety synonym Penstemon grinnellii subsp. grinnellii subspecies synonym Penstemon grinnellii subsp. scrophularioides (M.E.Jones) Munz subspecies synonym Penstemon gracilis subsp. wisconsinensis (Pennell) Pennell subspecies synonym Penstemon glaucus Graham species synonym Penstemon glaber var. cyananthus (Hook.) A.Gray variety synonym Penstemon gairdneri subsp. hians (Piper) D.D.Keck subspecies synonym Penstemon fruticiformis subsp. fruticiformis subspecies synonym Penstemon confusus var. patens M.E.Jones variety synonym Penstemon clevelandii subsp. clevelandii subspecies synonym Penstemon clevelandii subsp. angelicus (I.M.Johnst.) D.D.Keck subspecies synonym Penstemon cinereus Piper species synonym Penstemon canescens subsp. typicus Pennell subspecies synonym Penstemon canescens f. brittonorum (Pennell ex Small) Fernald form synonym Penstemon caespitosus subsp. suffruticosus (A.Gray) D.D.Keck subspecies synonym Penstemon bicolor subsp. bicolor subspecies synonym Penstemon azureus subsp. azureus subspecies synonym Penstemon azureus var. parvulus A.Gray variety synonym Penstemon attenuatus subsp. hyacinthinus Pennell subspecies synonym Penstemon hirsutus var. hirsutus variety synonym Penstemon laevigatus subsp. deamii (Pennell) R.W.Benn. subspecies synonym Penstemon australis subsp. australis subspecies synonym Penstemon confertus subsp. procerus (Douglas ex Graham) D.V.Clark subspecies synonym Chelone barbata Cav. species synonym Penstemon hybr species accepted Penstemon confertus var. caeruleopurpureus A.Gray variety synonym Penstemon pseudospectabilis subsp. pseudospectabilis subspecies synonym Penstemon eatonii subsp. eatonii subspecies synonym Dasanthera fruticosa (Pursh) Raf. species synonym Paederota cochlearifolia J.Koenig ex Rottb. species synonym Penstemon xylus A.Nelson species accepted Penstemon woodsii A.Nelson species synonym Penstemon wislizeni (A.Gray) Straw species accepted Penstemon wisconsinensis Pennell species synonym Penstemon watsonii subsp. typicus D.D.Keck subspecies synonym Penstemon washoensis Greene species synonym Penstemon vulcanellus Crosswh. species accepted Penstemon vizcainensis Moran species accepted Penstemon viscidulus Nees species synonym Penstemon violaceus (Brandegee) A.Nelson species synonym Penstemon verticillatus M.Martens & Galeotti species synonym Penstemon veronicifolius Greene species synonym Penstemon truncatus f. puberulus Pennell form synonym Penstemon triphyllus subsp. typicus D.D.Keck subspecies synonym Penstemon triflorus subsp. typicus Pennell subspecies synonym Penstemon tinctus Pennell species synonym Penstemon thompsoniae subsp. typicus D.D.Keck subspecies synonym Penstemon thompsoniae subsp. jaegeri D.D.Keck subspecies synonym Penstemon thompsoniae var. desperatus Neese variety synonym Penstemon themisteri E.Vilm. species synonym Penstemon teretiflorus Fraser species synonym Penstemon tepicensis Straw species accepted Penstemon tenuifolius Benth. species accepted Penstemon tenellus Kellogg species synonym Penstemon suffruticosus Douglas ex Benth. species synonym Penstemon suffrutescens Rydb. species synonym Penstemon strictus subsp. strictoformis (Rydb.) D.D.Keck subspecies synonym Penstemon stenosepalus (A.Gray) Howell species synonym Penstemon stenophyllus var. dasyphyllus (A.Gray) A.Gray variety synonym Penstemon staticifolius Lindl. species synonym Penstemon spectabilis subsp. typicus D.D.Keck subspecies synonym Penstemon spectabilis var. gilmanii Jeps. variety synonym Penstemon speciosus subsp. typicus D.D.Keck subspecies synonym Penstemon spathulatus Eastw. ex C.F.Baker species doubtful Penstemon smallii var. calycosus (Small) Krautter variety synonym Penstemon skutchii Straw species synonym Penstemon similis A.Nelson species synonym Penstemon shantzii var. incognitus A.Nelson variety synonym Penstemon secundiflorus subsp. lavendulus Pennell subspecies synonym Penstemon secundiflorus var. caudatus A.Nelson variety synonym Penstemon scrophularioides M.E.Jones species synonym Penstemon scouleri Lindl. species synonym Penstemon scoparius A.Nelson species synonym Penstemon schaffneri (Hemsl.) Straw species accepted Penstemon saltarius Crosswh. species accepted Penstemon saliens Rydb. species synonym Penstemon rydbergii var. varians (A.Nelson) Cronquist variety synonym Penstemon rydbergii subsp. typicus D.D.Keck subspecies synonym Penstemon rubescens A.Gray species synonym
DataSource	GBIF Backbone Taxonomy 2023-08-28