A western US native forming a large tree as much as 200' in height. The fine textured foliage is generally greenish-blue in color with faint white markings on the back. The plant is ornamentally significant and numerous cultivars have been selected over the years for varied form, foliage color and vigor. In addition the wood is valued for its durability and straight grain. The species has historically been plagued by various root diseases. Fortunately, many of the cultivars are now grafted on disease resistant rootstock.