List of Penstemon species

Species in the genus Penstemon are commonly called penstemons or beardtongues in English, and they will often have a common name based on either. As the subgenuses have some taxonomic uncertainty, the species are arranged alphabetically by name in the lists., there are species and seven natural hybrids, according to Plants of the World Online. The database World Flora Online regards all the species listed by POWO as valid, but additionally lists two natural hybrids as species and four additional species as valid.

''Penstemon'' species

These species of Penstemon are considered valid by both World Flora Online and Plants of the World Online, with the exception of Penstemon grandiflorus. In both POWO and WFO, it is regarded as a synonym of Penstemon bradburyi. However, P. grandiflorus continues to be widely used as the correct species name in North America, including by the Flora of North America and the USDA Natural Resources Conservation Service PLANTS database. It is listed as P. grandiflorus in the table with the synonym noted.

Scientific name Authority	Common names	Photo
Penstemon abietinus Pennell	Firleaf beardtongue
Penstemon absarokensis Evert	Absaroka Range beardtongue
Penstemon acaulis L.O.Williams	stemless penstemon
Penstemon acuminatus Douglas ex Lindl.	sharpleaf penstemon
Penstemon alamosensis Pennell & G.T.Nisbet	Los Alamos beardtongue
Penstemon albertinus Greene	Alberta penstemon
Penstemon albidus Nutt.	white penstemon
Penstemon albifluvis England	White River penstemon
Penstemon albomarginatus M.E.Jones	white-margined penstemon
Penstemon ambiguus Torr.	bush penstemon gilia beardtongue gilia penstemon
Penstemon ammophilus N.H.Holmgren & L.M.Schultz	sandloving penstemon
Penstemon amphorellae Crosswh.
Penstemon angelicus Moran
Penstemon anguineus Eastw.	Siskiyou penstemon
Penstemon angustifolius Nutt. ex Pursh	broadbeard beardtongue narrowleaf penstemon	[file:Penstemon angustifolius - Craig Martin 01.jpg\|120px\|alt=Flowers of Penstemon angustifolius]
Penstemon arenarius Greene	Nevada sanddune beardtongue sanddune penstemon
Penstemon arenicola A.Nelson	Red Desert penstemon
Penstemon aridus Rydb.	stiffleaf penstemon	[file:Penstemon aridus - stiff-leaf beardtongue.jpg\|120px\|alt=Flowers of Penstemon aridus]
Penstemon arkansanus Pennell	Arkansas beardtongue	[file:Penstemon arkansanus - Mason Brock 01.jpg\|120px\|alt=Flowers of Penstemon arkansanus]
Penstemon atropurpureus G.Don
Penstemon attenuatus Douglas	sulphur penstemon	[file:Penstemon attenuatus var. attenuatus - Joshua Morris 01.jpg\|120px\|alt=Flowers of Penstemon attenuatus]
Penstemon atwoodii S.L.Welsh	Kaiparowits beardtongue	[file:Penstemon atwoodii - Darrin Gobble 15.jpg\|120px\|alt=Flowers of Penstemon atwoodii]
Penstemon auriberbis Pennell	Colorado penstemon	[file:Penstemon auriberbis - Anders Hastings 01.jpg\|120px\|alt=Flowers of Penstemon auriberbis]
Penstemon australis Small	Eustis Lake beardtongue	[file:Penstemon australis - John Kees 02.jpg\|120px\|alt=Flowers of Penstemon australis]
Penstemon azureus Benth.	azure penstemon	[file:Penstemon azureus in Jardin botanique de la Charme 01.jpg\|120px\|alt=Flowers of Penstemon azureus]
Penstemon baccharifolius Hook.	baccharisleaf beardtongue	[file:Penstemon baccharifolius - Ben Meredyk 01.jpg\|120px\|alt=Flowers of Penstemon baccharifolius]
Penstemon barbatus Roth	golden-beard penstemon beardlip penstemon	[file:Penstemon barbatus - Craig Martin 01.jpg\|120px\|alt=Flowers of Penstemon barbatus]
Penstemon barnebyi N.H.Holmgren	Barneby's penstemon White River Valley beardtongue	[file:Penstemon_barnebyi_-_Matt_Berger_01.jpg\|120px\|alt=Flowers of Penstemon barnebyi]
Penstemon barrettiae A.Gray	Barrett's beardtongue	[file:Penstemon barrettiae (Scrophulariaceae) flower.JPG\|120px\|alt=Flowers of Penstemon barrettiae]
Penstemon bicolor Clokey & D.D.Keck	pinto beardtongue pinto penstemon	[file:Penstemon bicolor 9.jpg\|120px\|alt=Flowers of Penstemon barrettiae]
Penstemon bleaklyi O'Kane & K.D.Heil	bleakly penstemon	[file:Penstemon bleaklyi - Cecelia Alexander 05.jpg\|120px\|alt=Flower of Penstemon bleaklyi]
Penstemon bolanius Straw
Penstemon bracteatus D.D.Keck	Red Canyon beardtongue
Penstemon breviculus G.T.Nisbet & R.C.Jacks.	shortstem beardtongue shortstem penstemon	[file:Penstemon breviculus - aspidoscelis (1).jpg\|120px\|alt=Flowers of Penstemon breviculus]
Penstemon brevisepalus Pennell	short-sepaled beardtongue	[file:Penstemon brevisepalus.jpg\|120px\|alt=Flowers of Penstemon brevisepalus]
Penstemon buckleyi Pennell	buckley penstemon Buckley's beardtongue	[file:Penstemon buckleyi - henrya 01.jpg\|120px\|alt=Flowers of Penstemon buckleyi]
Penstemon caesius A.Gray	San Bernardino penstemon	[file:Penstemon caesius - Matthew Mosher 03.jpg\|120px\|alt=Flowers of Penstemon caesius]
Penstemon caespitosus Nutt. ex A.Gray	mat penstemon	[file:Penstemon caespitosus - Cecelia Alexander 01.jpg\|120px\|alt=Flowers of Penstemon caespitosus]
Penstemon calcareus Brandegee	limestone penstemon
Penstemon californicus D.D.Keck	California penstemon	[file:Penstemon californicus - Matt Berger 01.jpg\|120px\|alt=Flower of Penstemon californicus]
Penstemon calycosus Small	longsepal beardtongue	[file:Penstemon calycosus - vrschmalhofer 02.jpg\|120px\|alt=Flowers of Penstemon calycosus]
Penstemon campanulatus Willd.	bellflower beardtongue	[file:Penstemon campanulatus kz02.jpg\|120px\|alt=Flowers of Penstemon campanulatus]
Penstemon canescens Britton	eastern gray beardtongue	[file:Eastern Gray Beardtongue in the evening sun - Flickr - treegrow.jpg\|120px\|alt=Flowers of Penstemon canescens]
Penstemon cardinalis Wooton & Standl.	cardinal beardtongue	[file:Cardinal Beardtongue (51202746108).jpg\|120px\|alt=Flowers of Penstemon cardinalis]
Penstemon cardwellii Howell	Cardwell's beardtongue	[file:USFWS penstemon cardwellii (23535137030).jpg\|120px\|alt=Flowers of Penstemon cardwellii]
Penstemon carnosus Pennell	fleshy beardtongue	[file:Penstemon carnosus - Matt Berger 02.jpg\|120px\|alt=Penstemon carnosus blooming]
Penstemon caryi Pennell	Cary's beardtongue	[file:Penstemon caryi lg.jpg\|120px\|alt=Flowers of Penstemon caryi]
Penstemon centranthifolius Benth.	scarlet bugler	[file:Edwards' botanical register, or, Ornamental flower-garden and shrubbery.. (1829-1847) (20550182324).jpg\|120px\|alt=Illustration of Penstemon centranthifolius]
Penstemon cerrosensis Kellogg	Cedros island penstemon	[file:Penstemon cerrosensis - Sula Vanderplank 01.jpg\|120px\|alt=Penstemon cerrosensis blooming]
Penstemon cinicola D.D.Keck	ash penstemon	[file:Penstemon cinicola - Steve Matson 03.jpg\|120px\|alt=Flowers of Penstemon cinicola]
Penstemon clevelandii A.Gray	Cleveland's beardtongue	[file:Penstemonclevelandii.jpg\|120px\|alt=Flowers of Penstemon clevelandii]
Penstemon clutei A.Nelson	Sunset Crater beardtongue Sunset Crater penstemon	[file:Penstemon clutei2.jpg\|120px\|alt=Flowers of Penstemon clutei]
Penstemon cobaea Nutt.	cobaea beardtongue cobaea penstemon	[file:Penstemon cobaea.jpg\|120px\|alt=Flowers of Penstemon cobaea]
Penstemon comarrhenus A.Gray	dusty beardtongue dusty penstemon	[file:20180620 GGIGardens MordecaiChildrens DSCN0134.jpg\|120px\|alt=Flowers of Penstemon comarrhenus]
Penstemon concinnus D.D.Keck	Tunnel Springs beardtongue Tunnel Springs penstemon
Penstemon confertus Douglas	yellow penstemon	[file:Penstemon confertus near Squilchuck State Park Chelan County Washington 1.jpg\|120px\|alt=Flowers of Penstemon confertus]
Penstemon confusus M.E.Jones	Owens Valley beardtongue Owens Valley penstemon	[file:2015.05.16 07.25.43 IMG 2240 - Flickr - andrey zharkikh.jpg\|120px\|alt=Flowers of Penstemon confusus]
Penstemon crandallii A.Nelson	Crandall's penstemon	[file:Penstemon crandallii - Cecelia Alexander 03.jpg\|120px\|alt=Flowers of Penstemon crandallii]
Penstemon curtiflorus N.H.Holmgren
Penstemon cusickii A.Gray	Cusick's beardtongue	[file:Penstemon cusickii closeup-6-08-04.jpg\|120px\|alt=Flowers of Penstemon cusickii]
Penstemon cyananthus Hook.	Wasatch beardtongue	[file:Penstemon cyananthus, Grizzly Gulch, Little Cottonwood Canyon, Utah.jpg\|120px\|alt=Flowers of Penstemon cyananthus]
Penstemon cyaneus Pennell	blue penstemon	[file:Penstemon cyaneus NRCS-001.jpg\|120px\|alt=Flowers of Penstemon cyaneus]
Penstemon cyanocaulis Payson	bluestem beardtongue	[file:2015.05.08 15.27.34 IMG 2024 - Flickr - andrey zharkikh.jpg\|120px\|alt=Flowers of Penstemon cyanocaulis]
Penstemon cyathophorus Rydb.	cupped penstemon Middle Park penstemon	[file:Penstemon cyathophorus - Anders Hastings 03.jpg\|120px\|alt=Flowers of Penstemon cyathophorus]
Penstemon dasyphyllus A.Gray	Cochise beardtongue purple penstemon
Penstemon davidsonii Greene	Davidson's penstemon timberline penstemon	[file:Penstemon davidsonii 0092.JPG\|120px\|alt=Flowers of Penstemon davidsonii]
Penstemon deamii Pennell	Deam's beardtongue
Penstemon deaveri Crosswh.	Mt. Graham beardtongue	[file:Penstemon deaveri - Flickr - aspidoscelis (1).jpg\|120px\|alt=Flowers of Penstemon davidsonii]
Penstemon debilis O'Kane & J.L.Anderson	Parachute beardtongue	[file:Close up of dark green leaves and white flowers.jpg\|120px\|alt=Flowers of Penstemon debilis]
Penstemon degeneri Crosswh.	Degener's beardtongue	[file:Penstemon degeneri lg.jpg\|120px\|alt=Flowers of Penstemon degeneri]
Penstemon deustus Douglas ex Lindl.	scabland penstemon	[file:Penstemon deustus-6-22-04.jpg\|120px\|alt=Flowers of Penstemon deustus]
Penstemon digitalis Nutt. ex Sims	talus slope penstemon foxglove beardtongue	[file:Penstemon digitalis 15-p.bot-pens.digita-07.jpg\|120px\|alt=Flowers of Penstemon digitalis]
Penstemon diphyllus Rydb.	twoleaf beardtongue
Penstemon discolor D.D.Keck	Catalina beardtongue
Penstemon dissectus Elliott	dissected beardtongue	[file:Penstemon dissectus - Tia Tyler 02.jpg\|120px\|alt=Flower of Penstemon dissectus]
Penstemon distans N.H.Holmgren	Mt. Tumbull beardtongue
Penstemon dolius M.E.Jones	Jones's penstemon Jones' beardtongue	[file:Penstemon dolius var. dolius - Matt Berger 01.jpg\|120px\|alt=Flower of Penstemon dolius]
Penstemon dugesii Pérez-Calix & Zacarías
Penstemon duchesnensis Neese	Duchesne penstemon	[file:Duchesne penstemon close-up 1.jpg\|120px\|alt=Flowers of Penstemon duchesnensis]
Penstemon eatonii A.Gray	Eaton's penstemon firecracker penstemon	[file:Penstemon eatonii 6.jpg\|120px\|alt=Flowers of Penstemon eatonii]
Penstemon elegantulus Pennell	rockvine penstemon
Penstemon ellipticus J.M.Coult. & Fisher	eggleaf penstemon rocky ledge penstemon	[file:Penstemon ellipticus J01.jpg\|120px\|alt=Flowers of Penstemon ellipticus]
Penstemon eriantherus Nutt. ex Pursh	fuzzytongue penstemon	[file:Prairie Pentstemon (Pentstemon erianthera)-saam 1970.355.390.jpg\|120px\|alt=Illustraion of Penstemon erianthera]
Penstemon euglaucus English	glaucous beardtongue	[file:Penstemon euglaucus-IMG 7135.jpg\|120px\|alt=Flowers of Penstemon euglaucus]
Penstemon eximius D.D.Keck	extrodinary penstemon unusual beardtongue
Penstemon fasciculatus A.Gray
Penstemon fendleri Torr. & A.Gray	fendler penstemon	[file:Penstemon fendleri - Flickr - aspidoscelis (2).jpg\|120px\|alt=Flowers of Penstemon fendleri]
Penstemon filiformis D.D.Keck	threadleaf beardtongue	[file:Penstemon filiformis 1.jpg\|120px\|alt=Flowers of Penstemon filiformis]
Penstemon filisepalis Straw
Penstemon flavescens Pennell	high mountain penstemon
Penstemon floribundus Danley	Cordillia's penstemon
Penstemon floridus Brandegee	Panamint beardtongue Panamint penstemon	[file:Penstemon floridus H12.jpg\|120px\|alt=Flowers of Penstemon floridus]
Penstemon flowersii Neese & S.L.Welsh	Flowers' beardtongue	[file:Penstemon flowersii S01.jpg\|120px\|alt=Flowers of Penstemon flowersii]
Penstemon franklinii S.L.Welsh	Franklin's penstemon
Penstemon fremontii Torr. & A.Gray	Fremont penstemon	[file:2015.05.24 12.57.06 IMG 2355 - Flickr - andrey zharkikh.jpg\|120px\|alt=Flowers of Penstemon fremontii]
Penstemon fruticiformis Coville	Death Valley penstemon	[file:Penstemon fruticiformis B01.jpg\|120px\|alt=Flowers of Penstemon fruticiformis]
Penstemon fruticosus Greene	Greene bush penstemon	[file:Penstemon fruticosus var. fruticosus 1.jpg\|120px\|alt=Flowers of Penstemon fruticosus]
Penstemon gairdneri Hook.	Gairdner's penstemon	[file:Penstemon gairdneri 9248.JPG\|120px\|alt=Flowers of Penstemon gairdneri]
Penstemon galloensis G.L.Nesom
Penstemon gentianoides Poir.	gentian penstemon	[file:Penstemon gentianoides K01.jpg\|120px\|alt=Flowers of Penstemon gentianoides]
Penstemon gentryi Standl.
Penstemon gibbensii Dorn	Gibbens' beardtongue	[file:Penstemon gibbensii.jpg\|120px\|alt=Flowers of Penstemon gibbensii]
Penstemon glaber Pursh	sawsepal penstemon	[file:Penstemon glaber - 52221674095.jpg\|120px\|alt=Flowers of Penstemon glaber]
Penstemon glandulosus Douglas ex Lindl.	stickystem penstemon	[file:Penstemon glandulosus-5-25-05.jpg\|120px\|alt=Flowers of Penstemon glandulosus]
Penstemon glaucinus Pennell	blueleaf beardtongue
Penstemon globosus Pennell & D.D.Keck	globe penstemon	[file:Penstemon globosus W01.jpg\|120px\|alt=Flowers of Penstemon globosus]
Penstemon goodrichii N.H.Holmgren	Lapoint penstemon	[file:2017.06.03 13.50.09 IMG 0232 - Flickr - andrey zharkikh.jpg\|120px\|alt=Flowers of Penstemon goodrichii]
Penstemon gormanii Greene	Gorman's beardtongue	[file:Penstemon gormanii B01.jpg\|120px\|alt=Flowers of Penstemon gormanii]
Penstemon gracilentus A.Gray	slender penstemon	[file:Penstemon gracilentus H04.jpg\|120px\|alt=Flowers of Penstemon gracilentus]
Penstemon gracilis Nutt.	lilac penstemon slender penstemon	[file:Penstemon gracilis4.jpg\|120px\|alt=Flowers of Penstemon gracilis]
Penstemon grandiflorus Nutt. Penstemon bradburyi Pursh	large flower penstemon shell-leaf penstemon	[file:Penstemon grandiflorus - Tom Scavo 01.jpg\|120px\|alt=Flowers of Penstemon grandiflorus]
Penstemon grahamii D.D.Keck	Uinta Basin beardtongue	[file:Penstemon grahamii 1.jpg\|120px\|alt=Flowers of Penstemon grahamii]
Penstemon griffinii A.Nelson	Griffin's penstemon	[file:Penstemon griffinii - Anders Hastings 03.jpg\|120px\|alt=Flowers of Penstemon grinnellii]
Penstemon grinnellii Eastw.	Grinnell's beardtongue	[file:Penstemon grinnellii var. scrophularioides - Flickr - aspidoscelis.jpg\|120px\|alt=Flowers of Penstemon grinnellii]
Penstemon guadalupensis A.Heller	Guadalupe beardtongue
Penstemon hallii A.Gray	Hall's penstemon	[file:Penstemon hallii - My-Lan Le 01 square.jpg\|120px\|alt=Flowers of Penstemon hallii]
Penstemon harbourii A.Gray	Harbour's beardtongue
Penstemon harringtonii Penland	Harrington's penstemon	[file:Penstemon harringtonii - bunnymom 01.jpg\|120px\|alt=Flowers of Penstemon harringtonii]
Penstemon hartwegii Benth.	Hartweg's beardtongue	[file:Plantaginaceae - Penstemon hartwegii.jpg\|120px\|alt=Flowers of Penstemon hartwegii]
Penstemon havardii A.Gray	Big Bend beardtongue
Penstemon haydenii S.Watson ex J.M.Coult.	blowout beardtongue blowout penstemon	[file:Penstemon haydenni 01.jpg\|120px\|alt=Flowers of Penstemon haydenii]
Penstemon henricksonii Straw
Penstemon hesperius M.E.Peck	tall western penstemon
Penstemon heterodoxus A.Gray	Sierra beardtongue Sierra penstemon	[file:Penstemon heterodoxus whorled penstemon.jpg\|120px\|alt=Flowers of Penstemon heterodoxus]
Penstemon heterophyllus Lindl.	bunchleaf penstemon	[file:Penstemonheterophyllus0.jpg\|120px\|alt=Flowers of Penstemon heterophyllus]
Penstemon hidalgensis Straw
Penstemon hirsutus Willd.	hairy beardtongue	[file:Penstemon hirsutus Penstemon kosmaty 2023-06-08 01.jpg\|120px\|alt=Flowers of Penstemon hirsutus]
Penstemon humilis Nutt. ex A.Gray	low beardtongue low penstemon	[file:Penstemon humilis.jpg\|120px\|alt=Flowers of Penstemon humilis]
Penstemon idahoensis N.D.Atwood & S.L.Welsh	Idaho penstemon
Penstemon imberbis Trautv.
Penstemon immanifestus N.H.Holmgren	Steptoe Valley beardtongue Steptoe Valley penstemon
Penstemon incertus Brandegee	Mojave beardtongue	[file:Penstemon incertus B02.jpg\|120px\|alt=Flowers of Penstemon incertus]
Penstemon inflatus Crosswh.	inflated beardtongue	[file:Penstemon inflatus inflorescence.jpg\|120px\|alt=Flowers of Penstemon inflatus]
Penstemon isophyllus B.L.Rob.	equal-leaved penstemon	[file:Penstemon isophyllus A03.jpg\|120px\|alt=Flowers of Penstemon isophyllus]
Penstemon jamesii Benth.	James penstemon James' beardtongue	[file:Penstemon jamesii - Craig Martin 06.jpg\|120px\|alt=Flowers of Penstemon jamesii]
Penstemon janishiae N.H.Holmgren	Antelope Valley beardtongue Janish's penstemon	[file:Penstemonjanishiae1.jpg\|120px\|alt=Flowers of Penstemon janishiae]
Penstemon kingii S.Watson	King's beardtongue King's penstemon	[file:Penstemon kingii - Matt Berger 01.jpg\|120px\|alt=Flowers of Penstemon kingii]
Penstemon kralii D.Estes
Penstemon labrosus Mast. ex Hook.f.	San Gabriel beardtongue	[file:Penstemon labrosus - Alex Heyman 04.jpg\|120px\|alt=Flowers of Penstemon labrosus]
Penstemon laetus A.Gray	mountain blue penstemon	[file:Penstemon laetus - Alex Heyman 01.jpg\|120px\|alt=Flowers of Penstemon laetus]
Penstemon laevigatus Aiton	eastern smooth beardtongue	[file:Penstemon laevigatus - Becky Dill 01.jpg\|120px\|alt=Flowers of Penstemon laevigatus]
Penstemon laevis Pennell	southwestern beardtongue southwestern penstemon	[file:Penstemon laevis - Arvel Hernandez 01.jpg\|120px\|alt=Flowers of Penstemon laevis]
Penstemon lanceolatus Benth.	lanceleaf penstemon	[file:Penstemon lanceolatus - Patrick Alexander 01.jpg\|120px\|alt=Flowers of Penstemon lanceolatus]
Penstemon laricifolius Hook. & Arn.	larchleaf beardtongue	[file:Penstemon laricifolius - Patrick Alexander 01.jpg\|120px\|alt=Flowers of Penstemon laricifolius]
Penstemon laxiflorus Pennell	nodding beardtongue	[file:Penstemon laxiflorus - John Kees 03.jpg\|120px\|alt=Flowers of Penstemon laxiflorus]
Penstemon laxus A.Nelson	tufted penstemon
Penstemon leiophyllus Pennell	smoothleaf beardtongue smoothleaf penstemon	[file:Penstemon leiophyllus - Darrin Gobble 05.jpg\|120px\|alt=Flowers of Penstemon leiophyllus]
Penstemon lemhiensis D.D.Keck & Cronquist	Lemhi penstemon
Penstemon lentus Pennell	handsome beardtongue handsome penstemon	[file:Penstemon lentus - Robb Hannawacker 01.jpg\|120px\|alt=Flowers of Penstemon lentus]
Penstemon leonardii Rydb.	Leonard's beardtongue Leonard's penstemon	[file:Penstemon leonardii - Matt Berger 01.jpg\|120px\|alt=Flowers of Penstemon leonardii]
Penstemon leonensis Straw		[file:Penstemon leonensis - José Belem Hernández Díaz 01.jpg\|120px\|alt=Flower of Penstemon leonensis]
Penstemon linarioides A.Gray	creeping penstemon toadflax penstemon	[file:Penstemon_linarioides_-_loganjlbradley_01.jpg\|120px\|alt=Flowers of Penstemon linarioides]
Penstemon longiflorus S.L.Clark	longflower penstemon
Penstemon luteus G.L.Nesom
Penstemon lyallii A.Gray	Lyall's beardtongue	[file:Penstemon lyallii - Matt Berger 01.jpg\|120px\|alt=Flowers of Penstemon lyallii]
Penstemon marcusii N.H.Holmgren	Marcus' beardtongue
Penstemon mensarum Pennell	tiger beardtongue	[file:Penstemon mensarum - John Powers 02.jpg\|120px\|alt=Flowers of Penstemon mensarum]
Penstemon metcalfei Wooton & Standl.	Metcalfe's beardtongue
Penstemon miniatus Lindl.		[file:Penstemon miniatus - Erick Vélez Sánchez 02.jpg\|120px\|alt=Flowers of Penstemon miniatus]
Penstemon miser A.Gray	Malheur penstemon	[file:Penstemon miser - Matt Berger 01.jpg\|120px\|alt=Flower buds of Penstemon miser]
Penstemon moffatii Eastw.	Moffatt's beardtongue	[file:Penstemon moffatii - Patrick Alexander 01.jpg\|120px\|alt=Flowers of Penstemon moffatii]
Penstemon mohinoranus Straw	Cerro Mohinora penstemon
Penstemon monoensis A.Heller	Mono penstemon	[file:Penstemon monoensis - Matt Berger 01.jpg\|120px\|alt=Flowers of Penstemon monoensis]
Penstemon montanus Greene	cordroot beardtongue	[file:Penstemon montanus - Matt Berger 02.jpg\|120px\|alt=Flowers of Penstemon montanus]
Penstemon moriahensis N.H.Holmgren	Mount Moriah penstemon Mt. Moriah beardtongue
Penstemon mucronatus N.H.Holmgren	mucronate penstemon	[file:Penstemon mucronatus - Allison Clark 03.jpg\|120px\|alt=Flowers of Penstemon mucronatus]
Penstemon multiflorus Chapm. ex Small	manyflower beardtongue	[file:Penstemon multiflorus - Dwight Kingsbury 02.jpg\|120px\|alt=Flowers of Penstemon multiflorus]
Penstemon murrayanus Hook.	scarlet beardtongue	[file:Penstemon murrayanus - Eric Hunt 03.jpg\|120px\|alt=Flowers of Penstemon murrayanus]
Penstemon nanus D.D.Keck	dwarf beardtongue	[file:Penstemon nanus - Matt Berger 01.jpg\|120px\|alt=Flowers of Penstemon nanus]
Penstemon navajoa N.H.Holmgren	Navajo Mountain beardtongue
Penstemon neomexicanus Wooton & Standl.	New Mexico beardtongue	[file:Penstemon neomexicanus - CK Kelly 01.jpg\|120px\|alt=Flowers of Penstemon neomexicanus]
Penstemon neotericus D.D.Keck	Plumas County beardtongue	[file:Penstemon neotericus - Matt Berger 01.jpg\|120px\|alt=Flowers of Penstemon neotericus]
Penstemon newberryi A.Gray	mountain pride pride-of-the-mountains
Penstemon nitidus Douglas ex Benth.	waxleaf penstemon	[file:Penstemon nitidus - Patrick Alexander square.jpg\|120px\|alt=Flowers of Penstemon nitidus]
Penstemon nudiflorus A.Gray	Flagstaff beardtongue
Penstemon occiduus Straw
Penstemon oklahomensis Pennell	Oklahoma beardtongue Oklahoma penstemon
Penstemon oliganthus Wooton & Standl.	Apache beardtongue	[file:Penstemon oliganthus - Patrick Alexander 01.jpg\|120px\|alt=Flowers of Penstemon oliganthus]
Penstemon ophianthus Pennell	Arizona beardtongue coiled anther penstemon	[file:Penstemon ophianthus - Matt Berger 01.jpg\|120px\|alt=Flowers of Penstemon ophianthus]
Penstemon osterhoutii Pennell	Osterhout's beardtongue
Penstemon ovatus Douglas	eggleaf beardtongue	[file:Penstemon ovatus - John A Haskins 03.jpg\|120px\|alt=Flowers of Penstemon ovatus]
Penstemon pachyphyllus A.Gray ex Rydb.	thickleaf beardtongue thickleaf penstemon	[file:2017.06.04 13.05.42 IMG 0401 - Flickr - andrey zharkikh.jpg\|120px\|alt=Flower of Penstemon pachyphyllus]
Penstemon pahutensis N.H.Holmgren	Pahute penstemon Paiute beardtongue	[file:Penstemon pahutensis - Chloe and Trevor Van Loon 02.jpg\|120px\|alt=Flowers of Penstemon pahutensis]
Penstemon pallidus Small	pale beardtongue
Penstemon palmeri A.Gray	Palmer's penstemon Palmer penstemon	[file:Penstemon palmeri - P Holroyd 01.jpg\|120px\|alt=Flowers of Penstemon palmeri]
Penstemon papillatus J.T.Howell	Inyo beardtongue	[file:Penstemon papillatus - Chloe and Trevor Van Loon 04.jpg\|120px\|alt=Flowers of Penstemon papillatus]
Penstemon parryi A.Gray	Gray Parry penstemon Parry's beardtongue	[file:Penstemon parryi - Rachel Stringham 01.jpg\|120px\|alt=Flowers of Penstemon parryi]
Penstemon parvulus Krautter	Aquarius Plateau beardtongue	[file:Penstemon parvulus - Penstemon parvulus 02.jpg\|120px\|alt=Flowers of Penstemon parvulus]
Penstemon parvus Pennell	Aquarius Plateau penstemon
Penstemon patens N.H.Holmgren	Lone Pine beardtongue Lone Pine penstemon	[file:Penstemon patens Owens-Valley penstemon flowers.jpg\|120px\|alt=Flowers of Penstemon patens]
Penstemon payettensis A.Nelson & J.F.Macbr.	Payette beardtongue	[file:Penstemon payettensis - Wendy McCrady 01.jpg\|120px\|alt=Flowers of Penstemon payettensis]
Penstemon paysoniorum D.D.Keck	Payson's beardtongue	[file:Penstemon paysoniorum - Walter Fertig 01.jpg\|120px\|alt=Flowers of Penstemon paysoniorum]
Penstemon peckii Pennell	Peck's beardtongue	[file:Penstemon peckii - Tom Wainwright 01.jpg\|120px\|alt=Flowers of Penstemon peckii]
Penstemon penlandii W.A.Weber	Kremling beardtongue Kremling penstemon	[file:Penstemon penlandii square.jpg\|120px\|alt=Flowers of Penstemon penlandii]
Penstemon pennellianus D.D.Keck	Blue Mountain beardtongue	[file:Penstemon pennellianus - Tom Erler 01.jpg\|120px\|alt=Flowers of Penstemon pennellianus]
Penstemon perfoliatus Al.Brongn.
Penstemon perpulcher A.Nelson	Minidoka beardtongue	[file:Penstemon perpulcher.jpg\|120px\|alt=Flowers of Penstemon perpulcher]
Penstemon personatus D.D.Keck	closethroat beardtongue	[file:Penstemon personatus - Matt Berger 02.jpg\|120px\|alt=Flower of Penstemon personatus]
Penstemon petiolatus Brandegee	lime penstemon petiolate beardtongue	[file:Penstemon petiolatus - Matt Berger 02.jpg\|120px\|alt=Flowers of Penstemon petiolatus]
Penstemon pinifolius Greene	pineneedle beardtongue pineneedle penstemon	[file:Penstemon pinifolius - Patrick Alexander 01.jpg\|120px\|alt=Flower of Penstemon pinifolius]
Penstemon pinorum L.M.Shultz & J.S.Shultz	Pine Valley penstemon
Penstemon plagapineus Straw	pine-land penstemon
Penstemon platyphyllus Rydb.	broadleaf beardtongue broadleaf penstemon	[file:Penstemon platyphyllus - Matt Berger 01.jpg\|120px\|alt=Flowers of Penstemon platyphyllus]
Penstemon potosinus Straw	San Luis Potosi penstemon
Penstemon pratensis Greene	whiteflower beardtongue western whiteflower penstemon	[file:Penstemon pratensis - Nelson Balcar 01.jpg\|120px\|alt=Flowers of Penstemon pratensis]
Penstemon procerus Douglas ex Graham	littleflower penstemon pincushion beardtongue	[file:Penstemon procerus - Aiva Noringseth 01.jpg\|120px\|alt=Flowers of Penstemon procerus]
Penstemon pruinosus Douglas	Chelan beardtongue	[file:Penstemon pruinosus - Patrick Sowers 01.jpg\|120px\|alt=Flowers of Penstemon pruinosus]
Penstemon pseudoparvus Crosswh.	Mt. Washington beardtongue San Mateo penstemon	[file:Penstemon pseudoparvus - Alejandro Santillana 01.jpg\|120px\|alt=Flower of Penstemon pseudoparvus]
Penstemon pseudoputus N.H.Holmgren	Kaibab Plateau beardtongue	[file:Penstemon pseudoputus - Robb Hannawacker 01.jpg\|120px\|alt=Flowers of Penstemon pseudoputus]
Penstemon pseudospectabilis M.E.Jones	desert penstemon	[file:Penstemon pseudospectabilis - Patrick Alexander 01.jpg \|120px\|alt=Flowers of Penstemon pseudospectabilis]
Penstemon pudicus Reveal & Beatley	bashful penstemon Kawich Range beardtongue	[file:Penstemon pudicus.jpg\|120px\|alt=Flower of Penstemon pudicus]
Penstemon pumilus Nutt.	Salmon River beardtongue	[file:Penstemon pumilus - Wendy McCrady 02.jpg\|120px\|alt=Flowers of Penstemon pumilus]
Penstemon punctatus Brandegee
Penstemon purpusii Brandegee	Snow Mountain beardtongue	[file:Penstemon purpusii - Scott Yarger 03.jpg\|120px\|alt=Flowers of Penstemon purpusii]
Penstemon putus A.Nelson	Black River beardtongue
Penstemon radicosus A.Nelson	matroot penstemon	[file:Penstemon radicosus - Patrick Alexander 01.jpg\|120px\|alt=Flower of Penstemon radicosus]
Penstemon rattanii A.Gray	Rattan's beardtongue	[file:Penstemon rattanii var. kleei - Scott Yarger 03.jpg\|120px\|alt=Flowers of Penstemon rattanii var. kleei]
Penstemon reidmoranii Zacarías & A.Wolfe	Reid Moran's penstemon
Penstemon retrorsus Payson	Adobe Hills penstemon
Penstemon rhizomatosus N.H.Holmgren	Schell Creek penstemon
Penstemon richardsonii Douglas ex Lindl.	cutleaf beardtongue	[file:Penstemon richardsonii - Henrik Kibak 01.jpg\|120px\|alt=Flowers of Penstemon richardsonii]
Penstemon roezlii Regel	Roezl's penstemon	[file:Penstemon roezlii - Matt Berger 01.jpg\|120px\|alt=Flowers of Penstemon roezlii]
Penstemon roseus G.Don	pinto penstemon	[file:Penstemon roseus - Juan Cruzado Cortés 01.jpg\|120px\|alt=Flowers of Penstemon roseus]
Penstemon rostriflorus Kellogg	beaked beardtongue beakflower penstemon Bridge penstemon	[file:Penstemon rostriflorus - flower black background.jpg\|120px\|alt=Flowers of Penstemon rostriflorus]
Penstemon rotundifolius A.Gray	roundleaf penstemon	[file:Penstemon rotundifolius - Alejandra Peña Estrada 01.jpg\|120px\|alt=Flowers of Penstemon rotundifolius]
Penstemon rubicundus D.D.Keck	Wassuck penstemon Wassuk Range beardtongue	[file:釣鐘柳 Penstemon 'Rubicundus' -英格蘭 Brockhole, England- (9204859745).jpg\|120px\|alt=Flowers of Penstemon rubicundus]
Penstemon rupicola Howell	cliff beardtongue	[file:Penstemon rupicola - Colton Veltkamp 01.jpg\|120px\|alt=Flowers of Penstemon rupicola]
Penstemon rydbergii A.Nelson	meadow beardtongue Rydberg penstemon Rydberg's penstemon	[file:Penstemon rydbergii - Craig Martin 02.jpg\|120px\|alt=Flowers of Penstemon rydbergii]
Penstemon salmonensis N.H.Holmgren
Penstemon saltarius Crosswh.
Penstemon saxosorum Pennell	upland penstemon	[file:Penstemon saxosorum - Anders Hastings 01.jpg\|120px\|alt=Flowers of Penstemon saxosorum]
Penstemon scapoides D.D.Keck	pinyon beardtongue	[file:Penstemon scapoides - Jim Morefield 01.jpg\|120px\|alt=Flowers of Penstemon scapoides]
Penstemon scariosus Pennell	plateau penstemon	[file:Penstemon scariosus var. cyanomontanus - Kenzie Anderson-Bell 02.jpg\|120px\|alt=Flowers of Penstemon scariosus]
Penstemon schaffneri Straw	jarritos penstemon
Penstemon secundiflorus Benth.	sidebells penstemon	[file:Penstemon secundiflorus - Anders Hastings 01.jpg\|120px\|alt=Flowers of Penstemon secundiflorus]
Penstemon seorsus D.D.Keck	shortlobe penstemon	[file:Penstemon seorsus plant in SW Idaho 2.jpg\|120px\|alt=Flowers of Penstemon seorsus]
Penstemon sepalulus A.Nelson	littlecup beardtongue	[file:Penstemon sepalulus - Anders Hastings 01.jpg\|120px\|alt=Flowers of Penstemon sepalulus]
Penstemon serrulatus Menzies ex Sm.	serrulate penstemon	[file:Penstemon serrulatus - Ellyne Geurts 02.jpg\|120px\|alt=Flower of Penstemon serrulatus]
Penstemon smallii A.Heller	Small's beardtongue	[file:Pen smallii.jpg\|120px\|alt=Flowers of Penstemon smallii]
Penstemon spatulatus Pennell	Wallowa penstemon	[file:Penstemon spatulatus - Drew Meyer 01.jpg\|120px\|alt=Penstemon spatulatus]
Penstemon speciosus Douglas	royal penstemon	[file:Penstemon speciosus - Joshua Zupan 01.jpg\|120px\|alt=Penstemon speciosus]
Penstemon spectabilis Thurb. ex A.Gray	showy penstemon	[file:Penstemon spectabilis - Vasily Reinkymov 01.jpg\|120px\|alt=Flowers of Penstemon spectabilis]
Penstemon stenophyllus A.Gray	Sonoran beardtongue	[file:Penstemon stenophyllus - Patrick Alexander 01.jpg\|120px\|alt=Flowers of Penstemon stenophyllus]
Penstemon stephensii Brandegee	Stephens' penstemon	[file:J20171012-0014—Penstemon stephensii—RPBG—DxO (37693840276).jpg\|120px\|alt=Flowers of Penstemon stephensii]
Penstemon strictiformis Rydb.	Mancos penstemon stiff penstemon	[file:Penstemon strictiformis - San Juan County.jpg\|120px\|alt=Flowers of Penstemon strictiformis]
Penstemon strictus Benth.	Rocky Mountain beardtongue Rocky Mountain penstemon	[file:Penstemon strictus- Stephen Hornbeck 01.jpg\|120px\|alt=Flowers of Penstemon strictus]
Penstemon subglaber Rydb.	smooth penstemon	[file:Penstemon subglaber - Matt Berger 01.jpg\|120px\|alt=Flowers of Penstemon subglaber]
Penstemon subserratus Pennell	finetooth beardtongue	[file:Penstemon subserratus - Sam Kieschnick 01.jpg\|120px\|alt=Flowers of Penstemon subserratus]
Penstemon subulatus M.E.Jones	hackberry beardtongue	[file:Penstemon subulatus - Rachel Stringham 01.jpg\|120px\|alt=Flowers of Penstemon subulatus]
Penstemon sudans M.E.Jones	Susanville beardtongue Susanville penstemon	[file:Penstemon sudans - Matt Berger 01.jpg\|120px\|alt=Flower of Penstemon sudans]
Penstemon superbus A.Nelson	superb beardtongue	[file:Penstemon superbus - Alina Martin 01.jpg\|120px\|alt=Flowers of Penstemon superbus]
Penstemon tenuiflorus Pennell	eastern whiteflower beardtongue	[file:Penstemon tenuiflorus - Samuel A. Schmid 01.jpg\|120px\|alt=Flowers of Penstemon tenuiflorus]
Penstemon tenuifolius Benth.
Penstemon tenuis Small	sharpsepal beardtongue	[file:Penstemon tenuis - Laura Clark 01.jpg\|120px\|alt=Flowers of Penstemon tenuis]
Penstemon tepicensis Straw
Penstemon teucrioides Greene	germander beardtongue	[file:Penstemon teucrioides 01.jpg\|120px\|alt=Flowers of Penstemon teucrioides]
Penstemon thompsoniae Rydb.	Thompson's penstemon Thompson's beardtongue Thompson penstemon	[file:Penstemon thompsoniae - Matt Berger 01.jpg\|120px\|alt=Flowers of Penstemon thompsoniae]
Penstemon thurberi Torr.	Thurber's penstemon Thurber penstemon	[file:Penstemon thurberi - Van Loon 01.jpg\|120px\|alt=Flowers of Penstemon thurberi]
Penstemon tidestromii Pennell	Tidestrom's beardtongue	[file:Penstemon tidestromii - Matt Berger 02.jpg\|120px\|alt=Flowers of Penstemon tidestromii]
Penstemon tiehmii N.H.Holmgren	Tiehm's penstemon
Penstemon tracyi D.D.Keck	Trinity penstemon	[file:Penstemontracyi.jpg\|120px\|alt=Flowers of Penstemon tracyi]
Penstemon triflorus A.Heller	Heller's beardtongue	[file:Penstemon triflorus - Nick Loveland 01.jpg\|120px\|alt=Flowers of Penstemon triflorus]
Penstemon triphyllus Douglas	Riggin's penstemon	[file:Edwards' botanical register, or, Ornamental flower-garden and shrubbery.. (1829-1847) (21171546255).jpg\|120px\|alt=Illustration of Penstemon triflorus]
Penstemon tubaeflorus Nutt.	white wand beardtongue	[file:Penstemon tubiflorus var. tubiflorus.jpg\|120px\|alt=Flowers of Penstemon tubaeflorus]
Penstemon uintahensis Pennell	Uinta Mountain beardtongue	[file:Penstemon uintahensis - Parker Hopkins 01.jpg\|120px\|alt=Flowers of Penstemon uintahensis]
Penstemon utahensis Eastw.	Utah penstemon	[file:Penstemon utahensis 2.jpg\|120px\|alt=Flowers of Penstemon utahensis]
Penstemon venustus Douglas	Venus penstemon	[file:Penstemon venustus - Matt Berger 01.jpg\|120px\|alt=Flowers of Penstemon venustus]
Penstemon virens Pennell ex Rydb.	Front Range beardtongue	[file:Penstemon virens - Anders Hastings 01.jpg\|120px\|alt=Flowers of Penstemon virens]
Penstemon virgatus A.Gray	upright blue beardtongue	[file:Penstemon virgatus - Craig Martin 01.jpg\|120px\|alt=Flowers of Penstemon virgatus]
Penstemon vizcainensis Moran
Penstemon vulcanellus Crosswh.
Penstemon wardii A.Gray	Ward's beardtongue	[file:Penstemon wardii - Matt Berger 04.jpg\|120px\|alt=Flowers of Penstemon wardii]
Penstemon washingtonensis D.D.Keck	Washington beardtongue
Penstemon watsonii A.Gray	Watson's penstemon Watson's beardtongue Watson penstemon	[file:Penstemon watsonii - Matt Berger 01.jpg\|120px\|alt=Flowers of Penstemon watsonii]
Penstemon wendtiorum B.L.Turner		-
Penstemon whippleanus A.Gray	dark penstemon Whipple's penstemon	[file:Penstemon whippleanus - Marek 01.jpg\|120px\|alt=Flowers of Penstemon whippleanus]
Penstemon wilcoxii Rydb.	Wilcox's penstemon	[file:Penstemon wilcoxii - Matt Berger 01.jpg\|120px\|alt=Flowers of Penstemon wilcoxii]
Penstemon wislizeni Straw		[file:Penstemon wislizeni - Alejandra Peña Estrada 01.jpg\|120px\|alt=Flowers of Penstemon wislizeni]
Penstemon wrightii Hook.	Wright's beardtongue	[file:Penstemon wrightii - Texas 02.jpg\|120px\|alt=Flower of Penstemon wrightii]
Penstemon xylus A.Nelson	Tushar Bluemat Penstemon
Penstemon yampaensis Penland	Yampa penstemon

''Penstemon'' natural hybrids

these seven naturally occurring hybrids are valid, according to POWO. Two are considered valid species, according to WFO.

Scientific name Authority	Common names	Photo
Penstemon × crideri A.Nelson	Crider penstemon Crider's penstemon
Penstemon × dubius Davidson	dubius penstemon
Penstemon × jonesii Pennell Penstemon jonesii Pennell	Jones' penstemon	[file:Penstemon × jonesii - Darrin Gobble 05.jpg\|120px\|alt=Flower of Penstemon ×'' jonesii]
Penstemon × mirus A.Nelson
Penstemon × moronensis Crosswh. Penstemon moronensis Crosswh.
Penstemon × parishii A.Gray		[file:Penstemon × parishii - Jordan Zylstra 01.jpg\|120px\|alt=Flowers of Penstemon × parishii]
Penstemon × peirsonii'' Munz & I.M.Johnst.

Additional ''Penstemon'' species

These four species are listed as accepted by World Flora Online, but are not accepted by Plants of the World Online.

Scientific name Authority	Common names	Photo
Penstemon brevibarbatus Crosswhite
Penstemon compactus Crosswh.	cache beardtongue compact penstemon	[file:Penstemon compactus - crothfels 01.jpg\|120px\|alt=Penstemon compactus blooming]
Penstemon jaliscensis B.L.Rob.
Penstemon minutifolius Straw