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A picture of a Alder

Alder

Alnus spp.

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A photo of Alder
A photo of Alder
A photo of Alder

Overview

Commonly called alders, this genus contains approximately 44 species of deciduous shrubs and trees. They are distributed throughout Northern temperate regions, with some species in Central America and the Northern and Southern fringes of the Andes. Flowers are arranged in catkins and these are edible in some species. They are usually found near rivers, streams or wetlands and multiple hybrid species exist.