Yellow Pine (Pinus ponderosa) is also known as the ponderosa pine, bull pine and western yellow pine. The Yellow Pine is native to the western United States and Canada. The ponderosa pine is the most widely distributed pine in the northern united states. The first documented yellow pine was in Spokane, Washington in 1826. The Yellow Pine is the official city tree of Spokane; it is also the state tree of Montana. The yellow pine is a large evergreen tree. It is distinguished from other species because of its bark. When mature, the bark of yellow pines can range from yellow to an orange-red color. Bark on older Yellow Pines can reach up to centimeters in thickness. The thick bark of yellow pines protects them from forest fires. The bark has large plates with crevices. Younger yellow pines are referred to as blackjacks by loggers because of their dark blackish brown bark. Yellow pines are commonly planted in extensive gardens and parks. The appearance of a yellow pine boasts a straight trunk and a large crown. Branches of the trees produce needles (leaves) that are twelve to twenty-eight centimeters in length. The needles have sharply toothed edges and are slender and pointy. Yellow pines produce seed cones. The cones are seven to fourteen centimeters in diameter. The seeds from the cone typically have a 2.5-centimeter wing. Scales on the seed cone grow thicker towards its tip. Ponderosa pines can be found in a variety of soil conditions. They can grow in well-drained or dry soil or relatively deep and moist soil conditions. In higher growing elevations the yellow pine is usually found growing alongside douglas fir trees. The wood from yellow pines is mostly harvested for furniture and doors.