List of species or hybrid of other category

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Species	#images
Penstemon rostriflorus Kellogg
Penstemon palmeri A.Gray	2
Penstemon rupicola (Piper) Howell	2
Penstemon barbatus (Cav.) Roth	2
Penstemon campanulatus Willd.	1
Penstemon davidsonii Greene,	2
Penstemon gracilis Nutt.	1
Penstemon heterophyllus S.Watson	3
Penstemon nanus D.D. Keck	1
Penstemon laevigatus Aiton	3
Penstemon acuminatus Douglas ex Lindl.	1
Penstemon albomarginatus M.E.Jones	1
Penstemon anguineus Eastw.	1
Penstemon angustifolius Nutt. ex Pursh	3
Penstemon arkansanus Pennell	1
Penstemon attenuatus Douglas	2
Penstemon azureus Benth.	1
Penstemon barrettiae A.Gray	1
Penstemon bicolor (Brandegee) Clokey & D.D.Keck	3
Penstemon brevisepalus Pennell	1
Penstemon calycosus Small	2
Penstemon canescens Britton	1
Penstemon centranthifolius (Benth.) Benth.	1
Penstemon digitalis Nutt. ex Sims	4
Penstemon clevelandii A.Gray	1
Penstemon clutei A.Nelson	1
Penstemon cobaea Nutt.	2
Penstemon comarrhenus A.Gray	1
Penstemon cyaneus Pennell	2
Penstemon cyananthus Hook.
Penstemon cyananthus var. subglaber (A.Gray) N.H.Holmgren	1
Penstemon cyanocaulis Payson	2
Penstemon debilis O'Kane & J.L.Anderson	1
Penstemon degeneri Crosswh.	1
Penstemon deustus Douglas	3
Penstemon eatonii A.Gray	1
Penstemon eriantherus Nutt. ex Pursh	1
Penstemon floridus Brandegee	1
Penstemon fruticiformis Coville	1
Penstemon fruticosus var. fruticosus	1
Penstemon fruticosus (Pursh) Greene	2
Penstemon gibbensii Dorn	1
Penstemon gracilentus A.Gray	1
Penstemon grahamii D.D.Keck	2
Penstemon hartwegii Benth.	1
Penstemon haydenii S.Watson ex J.M.Coult.	1
Penstemon heterodoxus A.Gray	1
Penstemon hirsutus (L.) Willd.	1
Penstemon humilis Nutt. ex A.Gray	1
Penstemon incertus Brandegee	1
Penstemon janishiae N.H.Holmgren	1
Penstemon laetus A.Gray	1
Penstemon linarioides A.Gray	2
Penstemon bradburyi Pursh
Penstemon murrayanus Hook.	1
Penstemon newberryi A.Gray	1
Penstemon pachyphyllus A.Gray ex Rydb.	1
Penstemon pseudospectabilis M.E.Jones	1
Penstemon patens (M.E.Jones)	2
Penstemon penlandii W.A.Weber	2
Penstemon pennellianus D.D.Keck	1
Penstemon pinifolius Greene	3
Penstemon pinorum L.M.Shultz & J.S.Shultz	1
Penstemon procerus Douglas ex Graham	1
Penstemon pudicus Reveal & Beatley	1
Penstemon rhizomatosus N.H.Holmgren	1
Penstemon roezlii Regel	1
Penstemon rydbergii A.Nelson	1
Penstemon scapoides D.D.Keck	1
Penstemon scariosus Pennell	1
Penstemon serrulatus Menzies ex Sm.	1
Penstemon speciosus Douglas	1
Penstemon spectabilis Thurb. ex A.Gray	2
Penstemon stephensii Brandegee	1
Penstemon strictus Benth.	2
Penstemon sudans M.E.Jones	1
Penstemon tenuiflorus Pennell	1
Penstemon tenuis Small	1
Penstemon thompsoniae (A.Gray) Rydb.
Penstemon thurberi Torr.	1
Penstemon tracyi D.D.Keck	1
Penstemon triflorus A.Heller	2
Penstemon tubaeflorus Nutt.	1
Penstemon utahensis Eastw.	4
Penstemon venustus Douglas	1
Penstemon scariosus var. albifluvis (England) N.H.Holmgren	3
Penstemon scariosus var. cyanomontanus Neese
Penstemon scariosus var. garrettii (Pennell) N.H.Holmgren	4
Penstemon platyphyllus Rydb.	1
Penstemon gairdneri Hook.	1
Penstemon gairdneri var. gairdneri	1