Penstemon grandiflorus Nutt.
Large beardtongue, Large-flower beardtongue, Large-flowered penstemon
Scrophulariaceae (Figwort Family)
Synonym(s): Penstemon bradburii
USDA Symbol: PEGR7
Large, lavender, horizontally arranged, tubular flowers on a smooth stem above opposite, blue-green, clasping leaves and in axils of similar leafy bracts. This perennialís stout, unbranched stems, 2-3 ft. tall, bear opposite, blue-green, waxy leaves and pink to bluish-lavender, tubular flowers. The large flowers extend horizontally on short stalks from the axils of leafy bracts near top of stem.
This handsome plant is especially spectacular when growing in masses. It occasionally escapes from cultivation in the East. At least 15 species of Penstemon occur in eastern North America, and there are many more in the West.
From the Image Gallery
Bloom InformationBloom Color: Pink , Purple
Bloom Time: May , Jun
DistributionUSA: CO , CT , IA , IL , IN , KS , MA , MN , MO , MT , ND , NE , OH , OK , SD , TX , WI , WY
Native Distribution: IL to ND & s.e. MT, s. to c. TX
Native Habitat: Dry prairies
Growing ConditionsLight Requirement: Sun
Soil Description: Sandy soils.
Conditions Comments: Not Available
Value to Beneficial InsectsSpecial Value to Native Bees
Special Value to Bumble Bees
This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
PropagationDescription: Propagate by seed.
Seed Collection: Not Available
Seed Treatment: Germination is best with cold-moist stratification.
Commercially Avail: yes
Find Seed or Plants
Find seed sources for this species at the Native Seed Network.
View propagation protocol from Native Plants Network.
From the National Suppliers DirectoryAccording to the inventory provided by Associate Suppliers, this plant is available at the following locations:
Prairie Nursery - Westfield, WI
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Tohono Chul Park, Inc. - Tucson, AZ
Native Seed Network - Corvallis, OR
Bibliography* The Midwestern Native Garden: Native Alternatives to Nonnative Flowers and Plants An Illustrated Guide (2011) Adelman, Charlotte and Schwartz, Bernard L.
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Recommended Species Lists
Find native plant species by state. Each list contains commercially available species suitable for gardens and planned landscapes. Once you have selected a collection, you can browse the collection or search within it using the combination search.View Recommended Species page
Additional resourcesUSDA: Find Penstemon grandiflorus in USDA Plants
FNA: Find Penstemon grandiflorus in the Flora of North America (if available)
Google: Search Google for Penstemon grandiflorus
MetadataRecord Modified: 2012-10-03
Research By: TWC Staff