Rocky Mountain penstemon

Penstemon strictus

Semi-evergreen native perennial with deep blue-violet flowers, blooming May to June. Very common. Moderately drought tolerant, occurring in well-drained rocky to sandy loam soils on mid-elevation sagebrush, scrub and woodland openings; 5,000 to 11,000 ft. elevation. Widely adaptable and frequently used in soil stabilization, restoration and wildflower plantings. Visited by bumble bees and other native bees.