Penstemon angustifolius Nutt. ex. Pursh., narrow leaf penstemon, is native to various western and plains states. It is a stout, smooth, waxy, gray green perennial herb. The plant grows from 8 to 24 inches with several stout, erect or somewhat curving stems. The flowers range from ½ to ¾ inch and are various shades of violet and pink. Insect guidelines may or may not be present.