| Lateinischer name | Allgemeiner name | Familie | ||
| Penstemon digitalis Nutt. ex Sims | talus slope penstemon |
Scrophulariaceae |
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| Penstemon diphyllus Rydb. | twoleaf beardtongue |
Scrophulariaceae |
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| Penstemon discolor Keck | Cataiina beardtongue |
Scrophulariaceae |
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| Penstemon dissectus Ell. | dissected beardtongue |
Scrophulariaceae |
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| Penstemon distans N. Holmgren | Mt. Tumbull beardtongue |
Scrophulariaceae |
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| Penstemon dolius M.E. Jones ex Pennell | Jones beardtongue |
Scrophulariaceae |
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| Penstemon dolius M.E. Jones ex Pennell var. dolius | Jones beardtongue |
Scrophulariaceae |
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| Penstemon dolius M.E. Jones ex Pennell var. duchesnensis N. Holmgren | Duchesne penstemon |
Scrophulariaceae |
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| Penstemon duchesnensis (N. Holmgren) Neese | >>Penstemon dolius var. duchesnensis |
Scrophulariaceae |
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| Penstemon eatonii Gray | firecracker penstemon |
Scrophulariaceae |
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| Penstemon eatonii Gray ssp. eatonii | firecracker penstemon |
Scrophulariaceae |
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| Penstemon eatonii Gray ssp. exsertus (A. Nels.) Keck | firecracker penstemon |
Scrophulariaceae |
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| Penstemon eatonii Gray ssp. undosus (M.E. Jones) Keck | firecracker penstemon |
Scrophulariaceae |
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| Penstemon eatonii Gray var. eatonii Gray [superfluous autonym] | >>Penstemon eatonii |
Scrophulariaceae |
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| Penstemon eatonii Gray var. undosus M.E. Jones | >>Penstemon eatonii ssp. undosus |
Scrophulariaceae |
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| Penstemon elegantulus Pennell | rockvine penstemon |
Scrophulariaceae |
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| Penstemon ellipticus Coult. & Fisher | rocky ledge penstemon |
Scrophulariaceae |
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| Penstemon eriantherus Pursh | fuzzytongue penstemon |
Scrophulariaceae |
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| Penstemon eriantherus Pursh var. argillosus M.E. Jones | fuzzytongue penstemon |
Scrophulariaceae |
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| Penstemon eriantherus Pursh var. cleburnei (M.E. Jones) Dorn | Cleburn s penstemon |
Scrophulariaceae |
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| Penstemon eriantherus Pursh var. eriantherus | fuzzytongue penstemon |
Scrophulariaceae |
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| Penstemon eriantherus Pursh var. redactus Pennell & Keck | longsac penstemon |
Scrophulariaceae |
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| Penstemon eriantherus Pursh var. whitedii (Piper) A. Nels. | Whited s penstemon |
Scrophulariaceae |
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| Penstemon euglaucus English | glaucous beardtongue |
Scrophulariaceae |
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| Penstemon fendleri Torr. & Gray | Fendler s penstemon |
Scrophulariaceae |
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| Penstemon filiformis (Keck) Keck | threadleaf beardtongue |
Scrophulariaceae |
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| Penstemon flavescens Pennell | high mountain penstemon |
Scrophulariaceae |
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| Penstemon floribundus D. Danley | Cordillia s beardtongue |
Scrophulariaceae |
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| Penstemon floridus Brandeg. | Panamint beardtongue |
Scrophulariaceae |
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| Penstemon floridus Brandeg. ssp. austinii (Eastw.) Keck | >>Penstemon floridus var. austinii |
Scrophulariaceae |
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| Penstemon floridus Brandeg. var. austinii (Eastw.) N. Holmgren | Austin s beardtongue |
Scrophulariaceae |
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| Penstemon floridus Brandeg. var. floridus | Panamint beardtongue |
Scrophulariaceae |
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| Penstemon flowersii Neese & Welsh | Flowers beardtongue |
Scrophulariaceae |
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| Penstemon francisci-pennellii Crosswhite | >>Penstemon leiophyllus var. francisci-pennellii |
Scrophulariaceae |
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| Penstemon franklinii Welsh | Franklin s penstemon |
Scrophulariaceae |
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| Penstemon fremontii Torr. & Gray ex Gray | Fremont s beardtongue |
Scrophulariaceae |
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| Penstemon fremontii Torr. & Gray ex Gray var. fremontii | Fremont s beardtongue |
Scrophulariaceae |
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| Penstemon fremontii Torr. & Gray ex Gray var. glabrescens Dorn & Lichvar | Fremont s beardtongue |
Scrophulariaceae |
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| Penstemon fruticiformis Coville | Death Valley beardtongue |
Scrophulariaceae |
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| Penstemon fruticiformis Coville ssp. amargosae Keck | Death Valley beardtongue |
Scrophulariaceae |
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| Penstemon fruticiformis Coville ssp. fruticiformis | Death Valley beardtongue |
Scrophulariaceae |
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| Penstemon fruticiformis Coville var. amargosae (Keck) N. Holmgren | >>Penstemon fruticiformis ssp. amargosae |
Scrophulariaceae |
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| Penstemon fruticiformis Coville var. fruticiformis Coville [superfluous autonym] | >>Penstemon fruticiformis |
Scrophulariaceae |
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| Penstemon fruticosus (Pursh) Greene | bush penstemon |
Scrophulariaceae |
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| Penstemon fruticosus (Pursh) Greene ssp. scouleri (Lindl.) Pennell & Keck | >>Penstemon fruticosus var. scouleri |
Scrophulariaceae |
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| Penstemon fruticosus (Pursh) Greene ssp. serratus Keck | >>Penstemon fruticosus var. serratus |
Scrophulariaceae |
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| Penstemon fruticosus (Pursh) Greene var. albus ined. | >>Penstemon fruticosus var. scouleri |
Scrophulariaceae |
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| Penstemon fruticosus (Pursh) Greene var. fruticosus | bush penstemon |
Scrophulariaceae |
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| Penstemon fruticosus (Pursh) Greene var. scouleri (Lindl.) Cronq. | littleleaf bush penstemon |
Scrophulariaceae |
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| Penstemon fruticosus (Pursh) Greene var. serratus (Keck) Cronq. | sawleaf bush penstemon |
Scrophulariaceae |
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| Penstemon gairdneri Hook. | Gairdner s beardtongue |
Scrophulariaceae |
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| Penstemon gairdneri Hook. ssp. hians (Piper) Keck | >>Penstemon gairdneri var. gairdneri |
Scrophulariaceae |
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| Penstemon gairdneri Hook. ssp. oreganus (Gray) Keck | >>Penstemon gairdneri var. oreganus |
Scrophulariaceae |
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| Penstemon gairdneri Hook. var. gairdneri | Gairdner s beardtongue |
Scrophulariaceae |
||
| Penstemon gairdneri Hook. var. hians Piper | >>Penstemon gairdneri var. gairdneri |
Scrophulariaceae |
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| Penstemon gairdneri Hook. var. oreganus Gray | Gairdner s beardtongue |
Scrophulariaceae |
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| Penstemon garrettii Pennell | >>Penstemon scariosus var. garrettii |
Scrophulariaceae |
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| Penstemon gentianoides (Kunth) Poir. | gentian beardtongue |
Scrophulariaceae |
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| Penstemon gibbensii Dorn | Gibbens beardtongue |
Scrophulariaceae |
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| Penstemon glaber Pursh | sawsepal penstemon |
Scrophulariaceae |
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| Penstemon glaber Pursh var. alpinus (Torr.) Gray | alpine sawsepal penstemon |
Scrophulariaceae |
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| Penstemon glaber Pursh var. brandegeei (Porter) Freeman | Brandegee s penstemon |
Scrophulariaceae |
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| Penstemon glaber Pursh var. glaber | sawsepal penstemon |
Scrophulariaceae |
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| Penstemon glandulosus Dougl. | stickystem penstemon |
Scrophulariaceae |
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| Penstemon glandulosus Dougl. ssp. chelanensis Keck | >>Penstemon glandulosus var. chelanensis |
Scrophulariaceae |
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| Penstemon glandulosus Dougl. var. chelanensis (Keck) Cronq. | stickystem penstemon |
Scrophulariaceae |
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| Penstemon glandulosus Dougl. var. glandulosus | stickystem penstemon |
Scrophulariaceae |
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| Penstemon glaucinus Pennell | blueleaf beardtongue |
Scrophulariaceae |
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| Penstemon glaucus Graham | >>Penstemon gracilis |
Scrophulariaceae |
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| Penstemon globosus (Piper) Pennell & Keck | globe penstemon |
Scrophulariaceae |
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| Penstemon goodrichii N. Holmgren | Lapoint beardtongue |
Scrophulariaceae |
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| Penstemon gormanii Greene | Gorman s beardtongue |
Scrophulariaceae |
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| Penstemon gracilentus Gray | slender penstemon |
Scrophulariaceae |
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| Penstemon gracilis Nutt. | lilac penstemon |
Scrophulariaceae |
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| Penstemon gracilis Nutt. ssp. wisconsinensis (Pennell) Pennell | >>Penstemon gracilis var. wisconsinensis |
Scrophulariaceae |