|Alnus nepalensis in Panchkhal valley in Nepal|
A. nepalensis is a deciduous alder with silver-gray bark that reaches up to 30 m in height and 60 cm in diameter. It occurs throughout the Himalaya at 500–3000 m of elevation from Pakistan through Nepal and Bhutan to Yunnan in southwest China. The leaves are shallowly toothed, 7–16 cm long and 5–10 cm broad. The flowers are catkins, unusually for an alder produced in the autumn, with the seeds maturing the following year. Utis wood is moderately soft. It is occasionally used for making boxes and in light construction, and as firewood.
The tree grows quickly and is sometimes planted as erosion control on hillsides and for land recovery in shifting cultivation. It fixes nitrogen. It tolerates a wide variety of soil types and grows well in very wet areas.
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