Limber pine, scientifically known as Pinus flexilis, is a type of pine tree species native to the western regions of North America. This tree has several alternative names that refer to the same plant, including Rocky Mountain white pine, mountain pine, and whitebark pine. The tree gets its name "limber" due to its flexible branches, which can withstand heavy snowfall and wind. Limber pine is a slow-growing, long-lived tree that often grows at high altitudes of up to 11,000 feet above sea level. This species is valued for its timber, which is often used in construction work and for its unique aesthetic properties.