familyPlantaginaceae
genusPenstemon
subgenusPenstemon subg. Penstemon
sectionPenstemon sect. Glabri
speciesPenstemon scariosus
Penstemon scariosus var. albifluvis
in A. Cronquist et al., Intermount. Fl. 4: 442. 1984.
Common names: White River beardtongue
EndemicConservation concern
Basionym: Penstemon albifluvis England Great Basin Naturalist 42: 367. 1982
Treatment appears in FNA Volume 17. Treatment on page 179.
Leaves: basal seldom persisting. Flowers: calyx lobes 5–7.3 × 2.4–3 mm; corolla 22–28 mm, sparsely glandular-pubescent externally, limb lavender to pale blue; pollen sacs (1.6–)1.8–2.2 mm; style 18–22 mm.
Phenology: Flowering May–Jun.
Habitat: Desert shrublands, pinyon-juniper woodlands.
Elevation: 1500–2200 m.
Discussion
Variety albifluvis occurs in the Uinta Basin. The variety is known in Colorado only from small populations on barren rock outcrops of Green River Shale on Raven Ridge, Rio Blanco County (S. L. O’Kane 1988); Utah populations are restricted to Uintah County.
Selected References
None.
Lower Taxa
None.