Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Alnus viridis (Green Alder) is an alder with a wide range across the cooler parts of the Northern Hemisphere. It is a large shrub or small tree 3-12 m tall with smooth grey bark even in old age. The leaves are shiny green, ovoid, 3-8 cm long and 2-6 cm broad. The flowers are catkins, appearing late in spring after the leaves emerge (unlike other alders which flower before leafing out); the male catkins are pendulous, 4-8 cm long, the female catkins 1 cm long and 0.7 cm broad when mature in late autumn, in clusters of 3-10 on a branched stem.

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