Penstemon gentianoides

About

Penstemon gentianoides, the gentian beardtongue or gentian-leaved penstemon, is a species of flowering plant in the plantain family Plantaginaceae. Found on volcanic mountain slopes across Mexico and Central America, especially in Mexican mountain pine forests, it is a somewhat shrubby perennial herb that can grow up to 1.5 meters tall in good conditions. It has dense bundles of leaves and thyrse-shaped flower clusters with 3–6 flowers which are blue-violet. Named for its similarity to gentians, the species was first described in 1817. It was moved from its original genus Chelone to Penstemon in 1825, and was designated the type species of the new section Fasciculus in 1962.

Summary from Wikipedia