Penstemon

Accepted species 295 Documented here 179 Family Plantaginaceae

Accepted species 295 in this genus

Every accepted species in the genus is listed. A name links to its page when we hold at least three commercially licensed photographs of it. Where we do not, the row shows how many we actually found, which is usually none.

SpeciesAuthority Usable photographsPage
Penstemon digitalis Nutt. ex Sims 1,407 documented
Penstemon cobaea Nutt. 758 documented
Penstemon centranthifolius (Benth.) Benth. 557 documented
Penstemon fruticosus (Pursh) Greene 517 documented
Penstemon barbatus (Cav.) Roth 479 documented
Penstemon newberryi A.Gray 448 documented
Penstemon palmeri A.Gray 389 documented
Penstemon heterophyllus Lindl. 356 documented
Penstemon whippleanus A.Gray 356 documented
Penstemon serrulatus Menzies ex Sm. 330 documented
Penstemon davidsonii Greene 327 documented
Penstemon speciosus Douglas 325 documented
Penstemon eatonii A.Gray 310 documented
Penstemon procerus Douglas ex Graham 299 documented
Penstemon rostriflorus Kellogg 292 documented
Penstemon spectabilis Thurb. ex A.Gray 292 documented
Penstemon virens Pennell ex Rydb. 290 documented
Penstemon hirsutus (L.) Willd. 285 documented
Penstemon strictus Benth. 283 documented
Penstemon deustus Douglas 241 documented
Penstemon laevigatus Aiton 238 documented
Penstemon albidus Nutt. 219 documented
Penstemon laxiflorus Pennell 218 documented
Penstemon neomexicanus Wooton & Standl. 217 documented
Penstemon secundiflorus Benth. 216 documented
Penstemon parryi A.Gray 198 documented
Penstemon grinnellii Eastw. 195 documented
Penstemon rydbergii A.Nelson 187 documented
Penstemon bradburyi Pursh 183 documented
Penstemon confertus Douglas 182 documented
Penstemon multiflorus (Benth.) Chapm. ex Small 142 documented
Penstemon angustifolius Nutt. ex Pursh 136 documented
Penstemon utahensis Eastw. 132 documented
Penstemon gracilis Nutt. 125 documented
Penstemon baccharifolius Hook. 123 documented
Penstemon fendleri Torr. & A.Gray 121 documented
Penstemon nitidus Douglas ex Benth. 118 documented
Penstemon ellipticus J.M.Coult. & Fisher 110 documented
Penstemon labrosus (A.Gray) Mast. ex Hook.f. 100 documented
Penstemon roseus (Cerv. ex Sweet) G.Don 100 documented
Penstemon heterodoxus A.Gray 98 documented
Penstemon linarioides A.Gray 94 documented
Penstemon richardsonii Douglas ex Lindl. 94 documented
Penstemon rupicola (Piper) Howell 93 documented
Penstemon ambiguus Torr. 90 documented
Penstemon glaber Pursh 87 documented
Penstemon laetus A.Gray 86 documented
Penstemon pseudospectabilis M.E.Jones 86 documented
Penstemon tubaeflorus Nutt. 84 documented
Penstemon cyananthus Hook. 82 documented
Penstemon confusus M.E.Jones 80 documented
Penstemon pallidus Small 78 documented
Penstemon patens (M.E.Jones) N.H.Holmgren 74 documented
Penstemon cardwellii Howell 68 documented
Penstemon humilis Nutt. ex A.Gray 68 documented
Penstemon gentianoides (Kunth) Poir. 67 documented
Penstemon canescens Britton 66 documented
Penstemon eriantherus Nutt. ex Pursh 65 documented
Penstemon comarrhenus A.Gray 62 documented
Penstemon tenuis Small 60 documented
Penstemon lyallii (A.Gray) A.Gray 58 documented
Penstemon tenuiflorus Pennell 58 documented
Penstemon hallii A.Gray 53 documented
Penstemon australis Small 50 documented
Penstemon cyaneus Pennell 50 documented
Penstemon pruinosus Douglas 49 documented
Penstemon virgatus A.Gray 49 documented
Penstemon jamesii Benth. 48 documented
Penstemon gracilentus A.Gray 45 documented
Penstemon roezlii Regel 45 documented
Penstemon scapoides D.D.Keck 45 documented
Penstemon thurberi Torr. 45 documented
Penstemon radicosus A.Nelson 42 documented
Penstemon calycosus Small 41 documented
Penstemon euglaucus English 41 documented
Penstemon laevis Pennell 40 documented
Penstemon monoensis A.Heller 40 documented
Penstemon gormanii Greene 37 documented
Penstemon albertinus Greene 35 documented
Penstemon papillatus J.T.Howell 35 documented
Penstemon triflorus A.Heller 34 documented
Penstemon leiophyllus Pennell 33 documented
Penstemon wilcoxii Rydb. 33 documented
Penstemon diphyllus Rydb. 32 documented
Penstemon gairdneri Hook. 32 documented
Penstemon watsonii A.Gray 31 documented
Penstemon montanus Greene 30 documented
Penstemon campanulatus (Cav.) Willd. 29 documented
Penstemon kralii D.Estes 28 documented
Penstemon oliganthus Wooton & Standl. 28 documented
Penstemon pachyphyllus A.Gray ex Rydb. 27 documented
Penstemon buckleyi Pennell 26 documented
Penstemon attenuatus Douglas 25 documented
Penstemon purpusii Brandegee 25 documented
Penstemon laricifolius Hook. & Arn. 24 documented
Penstemon caesius A.Gray 23 documented
Penstemon californicus (Munz & I.M.Johnst.) D.D.Keck 22 documented
Penstemon clevelandii A.Gray 22 documented
Penstemon platyphyllus Rydb. 22 documented
Penstemon azureus Benth. 21 documented
Penstemon calcareus Brandegee 21 documented
Penstemon pinifolius Greene 21 documented
Penstemon caespitosus Nutt. ex A.Gray 20 documented
Penstemon murrayanus Hook. 20 documented
Penstemon pumilus Nutt. 20 documented
Penstemon subglaber Rydb. 20 documented
Penstemon venustus Douglas 20 documented
Penstemon acuminatus Douglas ex Lindl. 18 documented
Penstemon crandallii A.Nelson 18 documented
Penstemon filiformis (D.D.Keck) D.D.Keck 18 documented
Penstemon fruticiformis Coville 17 documented
Penstemon incertus Brandegee 17 documented
Penstemon pseudoputus (Crosswh.) N.H.Holmgren 17 documented
Penstemon lemhiensis (D.D.Keck) D.D.Keck & Cronquist 16 documented
Penstemon anguineus Eastw. 15 documented
Penstemon arenarius Greene 15 documented
Penstemon peckii Pennell 15 documented
Penstemon albomarginatus M.E.Jones 14 documented
Penstemon bicolor (Brandegee) Clokey & D.D.Keck 14 documented
Penstemon janishiae N.H.Holmgren 14 documented
Penstemon lanceolatus Benth. 14 documented
Penstemon petiolatus Brandegee 14 documented
Penstemon cyanocaulis Payson 13 documented
Penstemon ophianthus Pennell 13 documented
Penstemon perfoliatus Al.Brongn. 13 documented
Penstemon leonardii Rydb. 12 documented
Penstemon mensarum Pennell 12 documented
Penstemon parvulus (A.Gray) Krautter 12 documented
Penstemon pratensis Greene 12 documented
Penstemon barrettiae A.Gray 11 documented
Penstemon kingii S.Watson 11 documented
Penstemon leonensis Straw 11 documented
Penstemon oklahomensis Pennell 11 documented
Penstemon subulatus M.E.Jones 11 documented
Penstemon superbus A.Nelson 11 documented
Penstemon arkansanus Pennell 10 documented
Penstemon breviculus (D.D.Keck) G.T.Nisbet & R.C.Jacks. 10 documented
Penstemon havardii A.Gray 10 documented
Penstemon barnebyi N.H.Holmgren 9 documented
Penstemon brevisepalus Pennell 9 documented
Penstemon clutei A.Nelson 9 documented
Penstemon dasyphyllus A.Gray 9 documented
Penstemon aridus Rydb. 8 documented
Penstemon cerrosensis Kellogg 8 documented
Penstemon cinicola D.D.Keck 8 documented
Penstemon hesperius M.E.Peck 8 documented
Penstemon moffatii Eastw. 8 documented
Penstemon sudans M.E.Jones 8 documented
Penstemon thompsoniae (A.Gray) Rydb. 8 documented
Penstemon deaveri Crosswh. 7 documented
Penstemon immanifestus N.H.Holmgren 7 documented
Penstemon inflatus Crosswh. 7 documented
Penstemon mucronatus N.H.Holmgren 7 documented
Penstemon rattanii A.Gray 7 documented
Penstemon sepalulus A.Nelson 7 documented
Penstemon subserratus Pennell 7 documented
Penstemon amphorellae Crosswh. 6 documented
Penstemon arenicola A.Nelson 6 documented
Penstemon personatus D.D.Keck 6 documented
Penstemon wislizeni (A.Gray) Straw 6 documented
Penstemon eximius D.D.Keck 5 documented
Penstemon griffinii A.Nelson 5 documented
Penstemon saxosorum Pennell 5 documented
Penstemon stenophyllus A.Gray 5 documented
Penstemon bleaklyi O'Kane & K.D.Heil 4 documented
Penstemon globosus (Piper) Pennell & D.D.Keck 4 documented
Penstemon hartwegii Benth. 4 documented
Penstemon lentus Pennell 4 documented
Penstemon miser A.Gray 4 documented
Penstemon osterhoutii Pennell 4 documented
Penstemon payettensis A.Nelson & J.F.Macbr. 4 documented
Penstemon alamosensis Pennell & Nisbet 3 documented
Penstemon auriberbis Pennell 3 documented
Penstemon cardinalis Wooton & Standl. 3 documented
Penstemon cyathophorus Rydb. 3 documented
Penstemon flowersii Neese & S.L.Welsh 3 documented
Penstemon ovatus Douglas 3 documented
Penstemon pennellianus D.D.Keck 3 documented
Penstemon wrightii Hook. 3 documented
Penstemon ammophilus N.H.Holmgren & L.M.Schultz 4 below the evidence gate
Penstemon compactus (D.D.Keck) Crosswh. 2 below the evidence gate
Penstemon discolor D.D.Keck 2 below the evidence gate
Penstemon floridus Brandegee 2 below the evidence gate
Penstemon metcalfei Wooton & Standl. 2 below the evidence gate
Penstemon neotericus D.D.Keck 2 below the evidence gate
Penstemon triphyllus Douglas 2 below the evidence gate
Penstemon carnosus Pennell 1 below the evidence gate
Penstemon guadalupensis A.Heller 1 below the evidence gate
Penstemon isophyllus B.L.Rob. 1 below the evidence gate
Penstemon miniatus Lindl. 1 below the evidence gate
Penstemon reidmoranii Zacarías & A.Wolfe 1 below the evidence gate
Penstemon strictiformis Rydb. 1 below the evidence gate
Penstemon × crideri A.Nelson 0 below the evidence gate
Penstemon × dubius Davidson 0 below the evidence gate
Penstemon × mirus A.Nelson 0 below the evidence gate
Penstemon × parishii A.Gray 0 below the evidence gate
Penstemon × peirsonii Munz & I.M.Johnst. 0 below the evidence gate
Penstemon abietinus Pennell 0 below the evidence gate
Penstemon absarokensis Evert 0 below the evidence gate
Penstemon acaulis L.O.Williams 0 below the evidence gate
Penstemon albifluvis England 0 below the evidence gate
Penstemon angelicus (I.M.Johnst.) Moran 0 below the evidence gate
Penstemon atropurpureus (Sweet) G.Don 0 below the evidence gate
Penstemon atwoodii S.L.Welsh 0 below the evidence gate
Penstemon bolanius Straw 0 below the evidence gate
Penstemon bolanus Straw 0 below the evidence gate
Penstemon bracteatus D.D.Keck 0 below the evidence gate
Penstemon brevibarbatus Crosswhite 0 below the evidence gate
Penstemon caryi Pennell 0 below the evidence gate
Penstemon cedrosensis Krautter 0 below the evidence gate
Penstemon concinnus D.D.Keck 0 below the evidence gate
Penstemon curtiflorus (D.D.Keck) N.H.Holmgren 0 below the evidence gate
Penstemon cusickii A.Gray 0 below the evidence gate
Penstemon deamii Pennell 0 below the evidence gate
Penstemon debilis O'Kane & J.L.Anderson 0 below the evidence gate
Penstemon degeneri Crosswh. 0 below the evidence gate
Penstemon dissectus Elliott 0 below the evidence gate
Penstemon distans N.H.Holmgren 0 below the evidence gate
Penstemon dolius M.E.Jones 0 below the evidence gate
Penstemon duchesnensis (N.H.Holmgren) Neese 0 below the evidence gate
Penstemon dugesii Pérez-Calix & Zacarías 0 below the evidence gate
Penstemon elegantulus Pennell 0 below the evidence gate
Penstemon fasciculatus A.Gray 0 below the evidence gate
Penstemon filisepalis Straw 0 below the evidence gate
Penstemon flavescens Pennell 0 below the evidence gate
Penstemon floribundus Danley 0 below the evidence gate
Penstemon franklinii S.L.Welsh 0 below the evidence gate
Penstemon fremontii Torr. & A.Gray 0 below the evidence gate
Penstemon galloensis G.L.Nesom 0 below the evidence gate
Penstemon gentryi Standl. 0 below the evidence gate
Penstemon gibbensii Dorn 0 below the evidence gate
Penstemon glandulosus Douglas ex Lindl. 0 below the evidence gate
Penstemon glaucinus Pennell 0 below the evidence gate
Penstemon goodrichii N.H.Holmgren 0 below the evidence gate
Penstemon grahamii D.D.Keck 0 below the evidence gate
Penstemon harbourii A.Gray 0 below the evidence gate
Penstemon harringtonii Penland 0 below the evidence gate
Penstemon haydenii S.Watson ex J.M.Coult. 0 below the evidence gate
Penstemon henricksonii Straw 0 below the evidence gate
Penstemon hidalgensis Straw 0 below the evidence gate
Penstemon idahoensis N.D.Atwood & S.L.Welsh 0 below the evidence gate
Penstemon imberbis (Kunth) Trautv. 0 below the evidence gate
Penstemon jaliscensis B.L.Rob. 0 below the evidence gate
Penstemon jonesii Pennell 0 below the evidence gate
Penstemon laxus A.Nelson 0 below the evidence gate
Penstemon longiflorus (Pennell) S.L.Clark 0 below the evidence gate
Penstemon luteus G.L.Nesom 0 below the evidence gate
Penstemon marcusii (D.D.Keck) N.H.Holmgren 0 below the evidence gate
Penstemon minutifolius Straw 0 below the evidence gate
Penstemon mohinoranus Straw 0 below the evidence gate
Penstemon moriahensis N.H.Holmgren 0 below the evidence gate
Penstemon moronensis Crosswh. 0 below the evidence gate
Penstemon nanus D.D.Keck 0 below the evidence gate
Penstemon navajoa N.H.Holmgren 0 below the evidence gate
Penstemon nudiflorus A.Gray 0 below the evidence gate
Penstemon occiduus Straw 0 below the evidence gate
Penstemon pahutensis N.H.Holmgren 0 below the evidence gate
Penstemon parvus Pennell 0 below the evidence gate
Penstemon paysoniorum D.D.Keck 0 below the evidence gate
Penstemon penlandii W.A.Weber 0 below the evidence gate
Penstemon perpulcher A.Nelson 0 below the evidence gate
Penstemon pinorum L.M.Shultz & J.S.Shultz 0 below the evidence gate
Penstemon plagapineus Straw 0 below the evidence gate
Penstemon potosinus Straw 0 below the evidence gate
Penstemon pseudoparvus Crosswh. 0 below the evidence gate
Penstemon pudicus Reveal & Beatley 0 below the evidence gate
Penstemon punctatus Brandegee 0 below the evidence gate
Penstemon putus A.Nelson 0 below the evidence gate
Penstemon retrorsus Payson 0 below the evidence gate
Penstemon rhizomatosus N.H.Holmgren 0 below the evidence gate
Penstemon rotundifolius A.Gray 0 below the evidence gate
Penstemon rubicundus D.D.Keck 0 below the evidence gate
Penstemon salmonensis N.H.Holmgren 0 below the evidence gate
Penstemon saltarius Crosswh. 0 below the evidence gate
Penstemon scariosus Pennell 0 below the evidence gate
Penstemon schaffneri (Hemsl.) Straw 0 below the evidence gate
Penstemon seorsus (A.Nelson) D.D.Keck 0 below the evidence gate
Penstemon smallii A.Heller 0 below the evidence gate
Penstemon spatulatus Pennell 0 below the evidence gate
Penstemon stephensii Brandegee 0 below the evidence gate
Penstemon tenuifolius Benth. 0 below the evidence gate
Penstemon tepicensis Straw 0 below the evidence gate
Penstemon teucrioides Greene 0 below the evidence gate
Penstemon tidestromii Pennell 0 below the evidence gate
Penstemon tiehmii N.H.Holmgren 0 below the evidence gate
Penstemon tracyi D.D.Keck 0 below the evidence gate
Penstemon tubiflorus Nutt. 0 below the evidence gate
Penstemon uintahensis Pennell 0 below the evidence gate
Penstemon vizcainensis Moran 0 below the evidence gate
Penstemon vulcanellus Crosswh. 0 below the evidence gate
Penstemon wardii A.Gray 0 below the evidence gate
Penstemon washingtonensis D.D.Keck 0 below the evidence gate
Penstemon wendtiorum B.L.Turner 0 below the evidence gate
Penstemon xylus A.Nelson 0 below the evidence gate
Penstemon yampaensis Penland 0 below the evidence gate

Why some species have no pagethe gate

This site is commercial, so it can only publish photographs licensed for commercial use. Roughly three quarters of the photographs on iNaturalist are CC BY-NC, which excludes them. A species needs at least three usable photographs before we will build it a page, because a page with one picture and no traits tells you nothing you could not get from a search result, and generating hundreds of thousands of those is precisely the practice that got the previous version of this site deleted.

So the species above without a link are not errors and they are not omissions. They are real, accepted plants that we cannot yet document to the standard we hold ourselves to, and the count in the photographs column is exactly how far short we fall.

Sourcesevery claim on this page

  1. World Flora Online Plant List. Accepted names, authorities, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. Photograph counts, restricted to CC0 / CC BY / CC BY-SA. Retrieved 2026-06-27.