Species Identification

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

AttributeThe current selection is Penstemon_atwoodii
ClassificationPenstemon Penstemon Cristati
GeneralAtwood’s Penstemon. Blooms: June
Anther0.9-1.5 mm long, widely spreading, opening the full length, but not flat, smooth except for the nipple-toothed edges of cell openings.
StaminodeExserted beyond orifice, golden-yellow-bearded; fertile stamens barely exserted.
Leaves3/-8 cm (1 ¼-2”) long & 6-12 mm (1/4-3/8”) wide, narrowly oblanceolate to oblanceolate or lanceolate, entire, or sometimes toothed, acute or obtuse, the basal ones tapering to a petiolar base; the cauline ones stemless and clasping.
StemsRelatively tall perennial herb, 1.4-3.5 dm (5 ½-14”) tall, stems erect or ascending, 1 to few stems from a thick crown surmounting a taproot; herbage smooth to just below the inflorescence where it becomes glandular-puberulent (sticky-fuzzy).
InflorescenseNarrow, the cymes are dense clusters of subsessile (very short-stemmed) flowers.
CorollaTiny, 10-12 mm (3/8”) long, moderately belled, the upper lip projecting, the lobes of lower lip reflexed, the limb (lips) blue, the throat lavender with dark violet guidelines within, glandular-puberulent externally, the palate sparsely bearded.
Flower Color
Calyx6-8 mm (1/4”) long, segments lanceolate, acute, glandular-pubescent, the margins not ragged.
HabitatSandy soil in pinyon-juniper woodlands, 1650-2000 m (5500-6700’) elev.
RangeEndemic to the Kaiparowits Plateau and Smoky Mt. in adj. parts of Garfield and Kane Cos., UT.