Penstemon davidsonii Greene
Davidson's Penstemon, Davidson's Beardtongue, Timberline Penstemon, Timberline Beardtongue, Alpine Penstemon, Alpine Beardtongue, Blue Color Mat
Scrophulariaceae (Figwort Family)
USDA Symbol: PEDA2
A flat, mat-forming perennial with flowering branches less than 6 inches high. The thick, round leaves are dark green, sometimes red-tinged. A matted plant with a woody base and stems and opposite, crowded leaves. The short flowering branches usually bear 2-4 blue-lavender to rose-purple bilaterally symmetrical flowers that seem unusually large for such a matted plant.
When in full flower, this species forms spectacular lavender mats. Plants in the southern part of the range have toothless leaves; to the north, toothed leaves are common.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Fruit Type: Capsule
Size Notes: Up to about 6 inches tall.
Bloom InformationBloom Color: White , Purple , Violet
Bloom Time: May , Jun , Jul , Aug
Bloom Notes: Lavender to bluish lavender, violet or purple. Abaxial ridges usually lavender or white.
DistributionUSA: CA , NV , OR , WA
Native Distribution: S. B.C. to Tulare Co., CA & NV
Native Habitat: Rocky, alpine & sub-alpine woods & fields
Growing ConditionsLight Requirement: Sun
Soil Description: Well-drained soil with some summer water.
Conditions Comments: Must have winter snowcover.
BenefitUse Wildlife: Hummingbirds
Value to Beneficial InsectsSpecial Value to Native Bees
This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
PropagationDescription: Propagate using half-woody cuttings or seed.
Seed Treatment: 1-2 months stratification is necessary.
Commercially Avail: yes
Find Seed or Plants
View propagation protocol from Native Plants Network.
Web ReferenceWebref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter
Additional resourcesUSDA: Find Penstemon davidsonii in USDA Plants
FNA: Find Penstemon davidsonii in the Flora of North America (if available)
Google: Search Google for Penstemon davidsonii
MetadataRecord Modified: 2023-02-22
Research By: TWC Staff