Penstemon triflorus A. Heller
Hill Country Penstemon, Hill Country Beardtongue, Scarlet Penstemon, Scarlet Beardtongue, Heller's Penstemon, Heller's Beardtongue
Scrophulariaceae (Figwort Family)
USDA Symbol: petr2
Penstemon triflorus is 1 1/2-2 ft. tall. Its brilliant red flowers, 2 in. long, are among the most showy of the genus. Pairs of dark-green leaves occur opposite eachother along the stem. The two-lipped flowers also occur in pairs.
Small bushy stature, intense red color, and largeness of flowers set this penstemon apart from others.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Leaf Arrangement: Opposite
Leaf Pubescence: Puberulent
Leaf Margin: Dentate
Inflorescence: Panicle , Terminal
Fruit Type: Capsule
Size Notes: Up to about 2 feet tall.
Flower: Flower up to an inch wide. Sepals 5
Bloom InformationBloom Color: Red , Pink
Bloom Time: Mar , Apr , May , Jun , Jul
Native Distribution: Endemic to the Edwards Plateau in TX
Native Habitat: Limestone hills; open areas
Growing ConditionsWater Use: Low
Light Requirement: Sun
Soil Moisture: Dry
Soil Description: Limestone soils. Sandy, Sandy Loam, Medium Loam, Clay Loam, Clay, Limestone-based
Conditions Comments: Hill Country penstemon is a striking prairie or garden plant, and is another fabulous cut flower. Provides nectar for butterflies and hummingbirds. Cut back the old seed stalks or allow them to reseed. Hybridizes with the closely related Penstemon cobaea. Small bushy stature, intense red color, and largeness of flowers set this Penstemon apart from others.
BenefitUse Ornamental: Perennial garden, Blooms ornamental, Showy
Conspicuous Flowers: yes
Nectar Source: yes
Deer Resistant: Minimal
Value to Beneficial InsectsSpecial Value to Native Bees
This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
PropagationPropagation Material: Seeds
Description: Propagation is by seed or cuttings.
Seed Collection: Collect seed mid-summer, making sure it has not had the opportunity to hybridize with P. cobea.
Seed Treatment: Germination is best with cold-moist stratification.
Commercially Avail: yes
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Lady Bird Johnson Wildflower Center - Austin, TX
Tohono Chul Park, Inc. - Tucson, AZ
NPSOT - Native Plant Society of Texas - Fredericksburg, TX
NPSOT - Fredericksburg Chapter - Fredericksburg, TX
NPSOT - Austin Chapter - Austin, TX
NPSOT - Williamson County Chapter - Georgetown, TX
BibliographyBibref 293 - Manual of the Vascular Plants of Texas (1979) Correll, D. S. & M. C. Johnston
Bibref 318 - Native Texas Plants: Landscaping Region by Region (2002) Wasowski, S. & A. Wasowski
Bibref 281 - Shinners & Mahler's Illustrated Flora of North Central Texas (1999) Diggs, G. M.; B. L. Lipscomb; B. O'Kennon; W. F...
Bibref 286 - Wildflowers of the Texas Hill Country (1989) Enquist, M.
Search More Titles in Bibliography
Web ReferenceWebref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Additional resourcesUSDA: Find Penstemon triflorus in USDA Plants
FNA: Find Penstemon triflorus in the Flora of North America (if available)
Google: Search Google for Penstemon triflorus
MetadataRecord Modified: 2022-12-01
Research By: TWC Staff