Henderson, Mary S. and Mary Hall
Penstemon cobaea Nutt.
Wild foxglove, Prairie penstemon, Foxglove penstemon, False foxglove, Large-flowered beardtongue, Large-flowered penstemon, Prairie beardtongue, Cobaea penstemon
Scrophulariaceae (Figwort Family)
When in bloom, large, tubular flowers line at least half of cobaea beardtongue’s 1-2 ft. stems. The flowers are white with dark purple lines inside the floral tube. One to three stout stems rise from a woody rhizome
and bear thick, paired leaves which become smaller up the stem. The lower leaves have often withered by the time of flowering.
This penstemon attracts a variety of moths.
Image Gallery: 65 photo(s) available
Plant CharacteristicsDuration: Perennial Habit: Herb Size Notes:
1-2 feet. Fruit: Size Class:
Bloom InformationBloom Color: White , Pink
Bloom Time: Apr , May
AZ , AR , CO , IL , IA , KS , MO , NE , NM , OH , OK , TX Native Distribution:
S. NE, s. to s.c. MO, w. AR, OK & e. & c. TX Native Habitat:
Sandy or rocky, open hillsides; limestone outcrops, Loamy soils of Texas across the Rolling Plains and Blackland Prairies south to the Gulf of Mexico. USDA Native Status: L48(N)
Growing ConditionsWater Use: Medium
Light Requirement: Sun , Part Shade
Soil Moisture: Dry
Soil pH: Acidic (pH<6.8)
Soil Description: Calcareous or sandy loam. Rocky, Sandy, Limestone-based, Sandy Loam, Medium Loam, Clay Loam
Conditions Comments: Wild foxglove is not related to the true European foxglove. Showy tubular flowers may vary in color from almost white to dark pink to lavender. Cut back the stems after flowering, or wait for the seeds to ripen. This penstemon may go dormant during the summer.
Showy, Long-blooming, Blooms ornamental, Perennial
garden Use Wildlife:
This penstemon attracts a variety of moths. Nectar-insects, Cover Conspicuous Flowers:
Hummingbirds , Butterflies Larval Host:
Dotted Checkerspot butterfly Nectar Source:
Butterflies and Moths of North America (BAMONA)
is a larval host and/or nectar source for: