Penstemon is a genus of flowering plants that belongs to the family Plantaginaceae. They are commonly known as "beardtongues" and are prized for their showy, tubular flowers and attractive foliage. Penstemon plants are native to North and South America, and are now grown in many other parts of the world as ornamental plants.

Penstemon plants have upright stems that can reach up to three feet in height. The flowers are typically blue, purple, pink, red, or white, and have long, tubular petals that give them a distinctive shape. The foliage of Penstemon plants is often green and can be quite ornamental, with lance-shaped leaves.