Davidson’s Penstemon (Penstemon davidsonii)

Collier Cone Trail, Three Sisters NW, OR, 8/2013.

The genus name refers to the flower’s  five stamens.  There are over 200 species of penstemon in the west.  This is a common high-altitude variety in the Cascades.  Distinguishable from rupicola by its lavender color, and from procerus by its single flowers.  Fructicosus and nemorosis  appear at lower elevations.

Marmot Pass, Buckhorn Wilderness, WA, 7/2017.