| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
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| Plantaginaceae | Penstemon albidus | White Beardtongue | Prairies. | ON to AB south to KS, OK, TX, and NM. Nelson & Stanford (2023) cast doubt on whether P. albidus occurs in our region. | |
| Plantaginaceae | Penstemon alluviorum | Lowland Beardtongue | Bottomland forests and fields. | S. OH, s. IN, s. IL, and e. MO south to TN, AL, MS, and ne. AR. | 
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| Plantaginaceae | Penstemon arkansanus | Arkansas Beardtongue | Glades, woodlands. | S. IL, s. MO, and n. OK south to s. AR and s. OK. | 
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| Plantaginaceae | Penstemon australis | Southern Beardtongue, Sandhill Beardtongue | Longleaf pine sandhills, pine flatwoods, dry hammocks, dry sandy roadsides, woodland margins. | Se. VA south to c. peninsular FL, west to s. and wc. AL, primarily on the Coastal Plain, but not uncommon westward into the Piedmont and lower Mountains, and extending in the interior into c. TN. | 
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| Plantaginaceae | Penstemon brevisepalus | Short-sepaled Beardtongue | Dry, rocky woodlands and woodland edges. | Endemic to the sedimentary rock provinces of WV, sw. VA, KY, and TN. | 
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| Plantaginaceae | Penstemon buckleyi | Buckley's Beardtongue | Sandy prairies, inland sand dunes. | NE and e. CO south to c. TX and e. NM. | |
| Plantaginaceae | Penstemon calycosus | Long-sepal Beardtongue | Limestone ledges, other woodlands. | OH, s. MI, IL, and se. MO (Freeman & Morse 2019) south to w. VA, GA, and AL. | 
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| Plantaginaceae | Penstemon canescens | Appalachian Beardtongue | Woodlands, glades, forest edges, rocky woodlands, roadsides. | PA and s. IN south to nc. GA, n. AL, and c. TN. | 
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| Plantaginaceae | Penstemon cobaea var. cobaea | Showy Beardtongue, Large Beardtongue, Cobaea Penstemon | Limestone prairies and woodlands, sandy woodlands. | IA and NE south to AR and TX. | 
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| Plantaginaceae | Penstemon cobaea var. purpureus | Ozark Cobaea Beardtongue | Limestone and dolomite glades, calcareous prairies. | Endemic to the Ozarks and AR-OK Coastal Plain. | |
| Plantaginaceae | Penstemon deamii | Deam’s Beardtongue | Woodland edges. | Endemic to s. IN (and s. IL?), just across the Ohio River from KY. | 
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| Plantaginaceae | Penstemon digitalis | Tall White Beardtongue, Smooth Beardtongue | Alluvial forests, moist fields, disturbed areas, ditches. | NS and ME west to MN and SD, south to e. VA, w. SC, AL, and TX. The original distribution is somewhat uncertain. | 
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| Plantaginaceae | Penstemon dissectus | Georgia Beardtongue, Grit Beardtongue | Altamaha Grit outcrops, sandhills. | Endemic to Altamaha Grit outcrops and other sandy areas from e. GA south and west to sw. GA | 
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| Plantaginaceae | Penstemon fendleri | Fendler's Penstemon | Rocky or sandy areas. | W. OK, sw. KS, s. CO south through nc. TX, NM, and AZ to Mexico (CHH, COA). | |
| Plantaginaceae | Penstemon grandiflorus | Large Beardtongue | Prairies. | MI, MN, ND, and MT south to nc. TX and NM. | |
| Plantaginaceae | Penstemon guadalupensis | Guadalupe Penstemon | Prairies. | Endemic to TX. | |
| Plantaginaceae | Penstemon hirsutus | Northeastern Beardtongue | Dry woodlands, forests, and fields. | QC and ME west to MI and WI, south to n. VA and KY. | 
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| Plantaginaceae | Penstemon kralii | Kral’s Beardtongue | Dry, calcareous juniper-oak-hickory woodlands. | Endemic to the sw. Cumberland Escarpment of ne. AL and se. Tennessee (Blount, Madison, Morgan, and Jackson counties, AL, and Franklin County, TN. | |
| Plantaginaceae | Penstemon laevigatus | Eastern Smooth Beardtongue | Low meadows, bottomlands, forest edges, hammocks. | ME west to MI, south to s. GA, Panhandle FL, MS, and AR. | 
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| Plantaginaceae | Penstemon laxiflorus | Nodding Beardtongue | Dry sandy areas in woodlands and openings. | C. GA, FL Panhandle, and n. AL west to c. OK and c. TX. | 
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| Plantaginaceae | Penstemon multiflorus | | Longleaf pine sandhills, dry pine flatwoods, pine rocklands. | S. and e. GA and s. AL south to s. FL. | 
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| Plantaginaceae | Penstemon murrayanus | Scarlet Beardtongue, Cupleaf Beardtongue | Longleaf pine woodlands, other dry woodlands and openings. | S. AR and se. OK south to c. LA and e. TX. | 
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| Plantaginaceae | Penstemon oklahomensis | Oklahoma Beardtongue | Tallgrass prairies. | Endemic to OK and n. TX (Lamar County). | |
| Plantaginaceae | Penstemon pallidus | Eastern White Beardtongue | Limestone and shale barrens, other dry, disturbed areas. | ME west to MN, south to NC, GA, and AR. | 
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| Plantaginaceae | Penstemon smallii | Blue Ridge Beardtongue | Woodlands, cliffs, glades, roadbanks. | A Southern Appalachian endemic, distributed from nw. NC and ne. TN south to nw. SC, n. GA, and n. AL. | 
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| Plantaginaceae | Penstemon tenuiflorus | Plateau Beardtongue, Limestone Beardtongue, Kentucky Beardtongue | Dry woodlands, glades, prairies, barrens, cliffs, especially over limestone or other calcareous rocks. | Endemic to the Interior Low Plateau of wc. KY, c. TN, n. AL, extending slightly into the Coastal Plain to the west, and disjunct in the Black Belt of AL and MS. | 
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| Plantaginaceae | Penstemon tenuis | Gulf Coast Beardtongue | Bottomlands. | MS and AR south to LA and e. TX. | 
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| Plantaginaceae | Penstemon tubaeflorus | Trumpet Beardtongue | Prairies, glades, forest openings, fens, disturbed areas. | Sw. OH, IN, WI, IA, and NE south to w. KY, w. TN, MS, LA, and e. TX; also known from adventive sites farther east, as in e. PA (Rhoads & Klein 1993). | 
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