Green ash has leaves with 5 to 9 leaflets on 8 to 12 inch stems, and during fall and winter clusters of seeds remain on female trees. The shape of the seeds inspired Indians to use ash wood for canoe paddles, and pioneers used ash to make axe handles. Whitish shelf-brackets, or conks, growing on trunks and branches often indicate disease within the tree. Ponderosa pines are identified by 3 to 6 inch needles borne in clusters of two or three. In the Black Hills they are harvested for lumber and pulp, in the eastern part of the state they are often used in shelterbelt plantings, and pioneers and Indians used resin from ponderosa pine bark to ease the pain of burns and encourage growth of new skin.