Penstemon glaber (Sawsepal Penstemon)

Scrophulariaceae (Figwort)
Penstemon glaber is a tall plant, growing up to 30 inches. Flowers are deep blue-purple. Leaves are opposite, broad and smooth. Anther sacs have short hairs along their edges, most easily seen with a hand lens.

Vegetation zone:  Foothills, Montane
Time of bloom:  June - August
Origin:  Native
Eastern Colorado Wildflowers