Araucaria araucana (commonly called the monkey puzzle tree, monkey tail tree, Chilean pine, or pehuén) is an evergreen tree growing to 1-1.5 m (3–5 ft) in diameter and 30–40 m (100–130 ft) in height. It is native to central and southern Chile and western Argentina. Araucaria araucana is the hardiest species in the conifer genus Araucaria. Because of the longevity of this species, it is described as a living fossil. It is also the national tree of Chile.