Penstemon species

Click on the images below to see larger version.

Scientific Name Penstemon barbatus var. torreyi USDA PLANTS Symbol
PEBAT
Common Name Torrey's Penstemon, Beard-lip Penstemon ITIS Taxonomic Serial No.
538475
Family Plantaginaceae (Plantain) SEINet
Reference
Click Here
Description Life zones and habitat: Foothills to montane (6000 to 10000 ft); rocky or sandy soils in woodlands, meadows, roadsides and open areas.
Plant: Erect perennial with solitary or few stems up to 3 feet tall; sparse foliage.
Leaves: Sparse stem leaves are narrow, linear to lanceolate up to 6 inches long; basal leaves more ovate.
Inflorescence: Spire-like panicle of brilliant, smooth, scarlet two-lipped tubular blossoms 2 inches long; hairy lower lip divided into three lobes, and strongly reflexed (bent backwards); five stamens, one of which (staminode) is infertile and bearing a tuft of hairs.
Bloom Period: June to August.
References: "Flora of Colorado" by Jennifer Ackerfield, "A Guide to Rocky Mountain Plants" by Nelson and Williams and www.americansouthwest.net.
BONAP Distribution Map
Colorado Status:
Native
Scientific Name Penstemon palmeri USDA PLANTS Symbol
PEPA8
Common Name Palmer's Penstemon ITIS Taxonomic Serial No.
33738
Family Plantaginaceae (Plantain) SEINet
Reference
Click Here
Description Life zones and habitat: Foothills (6000 to 7700 ft); sandy soils along roadsides.
Plant: Erect perennial with solitary or few stems 20 to 55 inches tall.
Leaves: Basal and lower stem leaves large (2-3/8 to 4 inches long and 1/2 to 1-1/4 inches wide) and oblong to ovate; mid-stem leaves smaller, ovate; dentate margins; stem leaves opposite and clasping.
Inflorescence: Flowers in 5 to 10 crowded cymes clustered along stem, tending to be on one side; each cluster with 2 to 5 flowers; flowers with 5-lobed corolla about 3/4-inch long, mostly light pink with a few purple lines on the lower lobes; lower lobes smooth or somewhat hairy internally; staminode (unfertile stamen in center of blossom) slightly protruding, tip hooked and densely bearded with long, pale brownish yellow hairs.
Bloom Period: June to August.
References: "Flora of Colorado" by Jennifer Ackerfield, SEINet and www.americansouthwest.net.
BONAP Distribution Map
Colorado Status:
Introduced

Click here for purple and white Penstemons.

© Tom Lebsack 2019