Species Identification

Interested in the identification of penstemons? Please select a species then click on submit:

AttributeThe current selection is Penstemon_arenicola
ClassificationPenstemon Penstemon Coerulei
GeneralRed Desert Penstemon Blooms: mid April to June.
Anther0.7-1.0 mm, opening the full length, becoming opposite, but not flat.
StaminodeSlightly exserted, densely golden-yellow-bearded at the expanded tip; fertile stamens included.
LeavesMostly cauline, 2.5-5 cm (1-2) long & 4-11 mm (1/4-3/8) wide, entire, fleshy, narrowly elliptic or narrowly (ob)lanceolate, the lower one short-stemmed and the upper, stemless.
StemsPerennial herb, 0.8-1.8 dm (3-7) tall; stems ascending, often decumbent at the base, few to many arising from a short-branched caudex, this surmounting a taproot; herbage glaucous and glabrous (bluish and smooth).
InflorescenseOf 4-9 verticillasters mostly aggregated into a continuous thyrse, the cymes many-flowered, smooth.
Corolla12-14 mm (about ) long, lobes blue to bluish-purple, with red-violet guide-lines, the tube violet, moderately bulging, more or 2-lipped, the lobes subequal, oval, spreading, smooth externally, the palate sparsely white-bearded.
Flower Color
Calyx4-6 mm (to 1/4) long, the segments narrowly lanceolate, smooth, becoming ribbed with age, the edges narrowly ragged, entire.
HabitatDry, sandy hills, plains and white shale bluffs in sagebrush communities, 1800-2200m (6000-7300).
RangeSouthwest WY in the Red Desert region of Carbon and Sweetwater Cos., w to Lincoln and Uinta Cos. (and nw CO?) entering the region in Daggett and Uintah Cos., UT (reported in sw MT, but questionable).