Penstemon is a very large genus of North American wildflowers also known as beardtongue. I have found the narrow leaf variety growing all over the foothills and plains of Colorado wherever sandy soil is found. Besides being a pretty flower that is very hardy and drought tolerent it was believed that Native Americans used penstemon roots to relieve toothaches.
Deep in their roots, all flowers keep the light. -- Theodore Roethke
This narrow leaf penstemon comes in many hues of purple, lavender, violet, and amethyst.