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Common Alder (Aluns glutinosa)


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A common tree throughout Europe. It tolerates very moist soils and is often found on river banks. It is most common in lowlands and can reach a height of 30 metres. It is easily recognisable in winter by narrow, oval, stalked violet brown buds. The broad leaves are sticky in spring. The flowers are arranged in catkins and are already formed by the autumn. They open in early spring (March). The female ones develop into woody cones with small winged nutlets. The trees roots have small nodules with nitrogen fixing bacteria which can enrich the soil. Pictured at Bromham, Bedfodshire Mid November 2005.

7th Nov 2005 by Diane Earl

Biology, Science

Key Stages:
Foundation, Key Stage 1, Key Stage 2, Key Stage 3, Key Stage 4, Key Stage 4+

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