Pinus koraiensis, commonly called Korean pine, is native to Korea, Manchuria, eastern Russia and Japan. When young, this tree typically grows in a narrow pyramidal form with ascending branching. With age, it relaxes into a loose pyramidal shape with a rounded crown and branching that is almost horizontal. Branching on mature trees usually extends to the ground. Blue-green needles (to 4 1/2" long) appear in bundles of 5. Cones (3-6" long) mature to brown and contain large edible seeds (pine nuts to 3/4" long). Pine nuts from this species are widely distributed in commerce. Gray to gray-brown bark flakes to reveal a reddish-brown inner bark. Timber from this tree has a number of commercial uses including for furniture, bridges and construction.