Alnus incana (Grey or Speckled Alder) is a species in the Betulaceae (Birch) family with a wide range across the cooler parts of the Northern Hemisphere. In California it is found primarily in the Sierras. It is a small to medium size tree 15-20 meter tall with smooth grey bark even in old age, its life span being a maximum of 60-100 years. The leaves are matte green, ovoid, 5-11 centimeter long and 4-8 centimeter broad. The flowers are catkins, appearing early in spring before the leaves emerge, the male catkins pendulous and 5-10 centimeter long, the female catkins 1.5 centimeter long and one centimeter broad when mature in late autumn. The seeds are small, 1-2 millimeter long, and light brown with a narrow encircling wing. The Grey Alder has a shallow root system, and is marked not only by vigorous production of stump suckers, but also by root suckers, especially in the northern parts of its range. The wood resembles that of the black alder, but is somewhat paler and of little commercial value.