Penstemon (crandallii to mensaurum) 

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Scientific Name Penstemon crandallii ssp. crandallii USDA PLANTS Symbol
PECRC
Common Name Crandall's Penstemon ITIS Taxonomic Serial No.
33858
Family Plantaginaceae (Plantain) formerly Scrophulariaceae SEINet
Reference
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Description Life zones and habitat: Foothills to subalpine (6000 to 11000 ft); open, dry slopes and meadows.
Plant: Short perennial growing in spreading mats less than 6-1/2 inches tall with flowering, ascending stems sprawling along the ground.
Leaves: Ascending/upright, narrowly oblanceolate to spatulate 3/8 to 1-1/8 inches long; no obvious petiole; smooth to minutely hairy.
Inflorescence: Flowers crowded clusters atop the stem, tending to be on one side; each 5-lobed corolla 1/2 to 3/4-inch long, light to dark blue and covered with glandular hairs externally; lower lobes somewhat hairy internally, yellow hairs; staminode (unfertile stamen in center of blossom) covered with golden-yellow hairs; and anthers smooth; calyx ~1/4-inch long and covered with glandular 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.swcoloradowildflowers.com.
BONAP Distribution Map
Colorado Status:
Native
Scientific Name Penstemon glaber var. alpinus USDA PLANTS Symbol
PEGLA
Common Name Alpine Sawsepal Penstemon ITIS Taxonomic Serial No.
529485
Family Plantaginaceae (Plantain) formerly Scrophulariaceae SEINet
Reference
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Description Life zones and habitat: Foothills to subalpine (5500 to 11000 ft). Common in open meadows with gravelly soils.
Plant: Erect, stout unbranched perennial 20 to 26 inches tall with smooth stems.
Leaves: Basal leaves usually lanceolate, sometimes ovate with entire margins and 3/4 to 3-1/8 inches long; stem leaves linear-lanceolate to lanceolate, entire margins, 1-1/4 to 4-3/4 inches long and upper-most clasping; leaves smooth or hairy.
Inflorescence: Flowers in 8 to 12 crowded clusters along stem, tending to be on one side; each 5-lobed corolla 1 to 1-3/8 inches long, blue to lavender and hairless externally; lower lobes smooth or somewhat hairy internally; staminode (unfertile stamen in center of blossom) tip hairy, rounded or with slight notch, and anthers usually hairy.
Bloom Period: June to August.
References: "Flora of Colorado" by Jennifer Ackerfield and Montana Field Guide.
BONAP Distribution Map
Colorado Status:
Native
Scientific Name Penstemon hallii USDA PLANTS Symbol
PEHA9
Common Name Hall's Beardtongue ITIS Taxonomic Serial No.
33699
Family Plantaginaceae (Plantain) formerly Scrophulariaceae SEINet
Reference
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Description Life zones and habitat: Alpine (10000 to 14000 ft). Alpine meadows, tundra, scree slopes.
Plant: Perennial 4 to 8 inches tall, several erect stems, often mat-forming.
Leaves: Mostly basal leaves, smooth, narrowly oblanceolate to linear-lanceolate, 3/4 to 2 inches long and 1/10 to 1/3-inch wide.
Inflorescence: Few to many blossoms in thryse clusters atop stems on shorter plants, one-sided groupings on taller plants; bright reddish-purple, blue to blue-purple flowers, white streaks in throat; protruding staminode, densely orange-bearded most of its length.
Bloom Period: June to August.
References: "A Guide To Rocky Mountain Plants" by Roger L. Williams, "Flora of Colorado" by Jennifer Ackerfield and the American Penstemon Society.
BONAP Distribution Map
Colorado Status:
Native
Endemic
Scientific Name Penstemon harbourii USDA PLANTS Symbol
PEHA10
Common Name Harbour's Beardtongue ITIS Taxonomic Serial No.
33700
Family Plantaginaceae (Plantain) formerly Scrophulariaceae SEINet
Reference
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Description Life zones and habitat: Alpine (10,500 to 13800 ft). Open alpine scree and talus slopes.
Plant: Creeping, mat-forming perennial, leafy stems up to 6 inches long.
Leaves: Lower stem leaves spatualate to oblanceolate, becoming ovate to lanceolate above, usually light green or grayish with small hairs on surface, 3/4 to 1-1/2 inches long.
Inflorescence: Leafy, short, crowded thyrse 3/4 to 1-1/2 inches long of a few light purple flowers with 5 lobes; blossoms hairy outside and near the lips of the lower three lobes.
Bloom Period: July and August.
References: "A Guide To Rocky Mountain Plants" by Roger L. Williams, "Flora of Colorado" by Jennifer Ackerfield and www.americansouthwest.net.
BONAP Distribution Map
Colorado Status:
Native
Endemic
Scientific Name Penstemon mensarum USDA PLANTS Symbol
PEME2
Common Name Mesa Penstemon, Tiger Beardtongue ITIS Taxonomic Serial No.
33725
Family Plantaginaceae (Plantain) formerly Scrophulariaceae SEINet
Reference
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Description Life zones and habitat: Foothills to montane (7400 to 10200 ft). Meadows and forests in Grand Mesa area of west-central Colorado, endemic to the area.
Plant: Erect, stout unbranched perennial 16 to 20 inches tall with smooth stems becoming glandular at the inflorescence.
Leaves: Basal leaves elliptic, oblong or lanceolate-elliptic, smooth and 2-3/8 to almost 8 inches long and less than 5/8-inch wide; few oblanceolate stem leaves.
Inflorescence: Elongated, glandular inflorescence with a few to several separated whorls of flowers standing straight out or upward from stem, mostly along one side; each blossom with a short (less than 1/5-inch long), glandular-hairy calyx and 5-lobed corolla less than 3/4-inch long, dark blue to bluish-purple and glandular-hairy externally, hairless internally; staminode (unfertile stamen in center of blossom) with long yellow hairs most of its length; anthers have short stiff hairs.
Bloom Period: June to July.
References: "Flora of Colorado" by Jennifer Ackerfield and American Penstemon Society.
BONAP Distribution Map
Colorado Status:
Native
Endemic

Click here for white and red Penstemons.


© Tom Lebsack 2019