Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Alnus incana (Grey or Speckled Alder) is a species of alder with a wide range across the cooler parts of the Northern Hemisphere. It is a small to medium size tree 15-20 m tall with smooth grey bark even in old age, its life span being a maximum of 60-100 years. The leaves are matt green, ovoid, 5-11 cm long and 4-8 cm broad. The flowers are catkins, appearing early in spring before the leaves emerge, the male catkins pendulous and 5-10 cm long, the female catkins 1.5 cm long and one cm broad when mature in late autumn.

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