Hello,my name is Trevor and i`m looking at the Rocky Mountain Penstemon. This flower grows in the mountain. It can grow 2-4 feet tall. Its scientific name is Penstemon strictus. It is so beautiful and tall. Its suggested uses are slopes,hillsides,roadsides,mixtures. Its blooming period is may-july. And the seeding rate 4lb. The other name is (scrophulariaceae).