familyPlantaginaceae
genusPenstemon
subgenusPenstemon subg. Penstemon
sectionPenstemon sect. Glabri
speciesPenstemon cyananthus
Penstemon cyananthus var. subglaber
Brittonia 31: 105. 1979.
Endemic
Basionym: Penstemon fremontii var. subglaber A. Gray in A. Gray et al., Syn. Fl. N. Amer. 2(1): 262. 1878
Synonyms: P. cyananthus subsp. subglaber (A. Gray) Pennell
Stems ascending to erect, 22–70(–90) cm. Cauline leaves: blade lanceolate to oblanceolate. Thyrses 5–21 cm, verticillasters 4–11. Flowers: calyx lobes ovate to lanceolate, apex acute to cuspidate, rarely acuminate; corolla 16–25(–28) mm. 2n = 16.
Phenology: Flowering May–Jul.
Habitat: Clayey soils, sagebrush shrublands.
Elevation: 1400–2900 m.
Distribution
Idaho, Mont., Utah, Wyo.
Discussion
Variety subglaber is easily confused with individuals of Penstemon subglaber with sparsely glandular-pubescent corollas; calyx lobe shape and anther morphology usually distinguish the two reliably. Penstemon holmgrenii S. L. Clark is an invalid name that applies here.
Selected References
None.
Lower Taxa
None.