Answer: Alder trees are in the birch family (Betulaceae) and the genus Alnus. Alders tend to grow in wet, slightly acidic soils especially along the edges of wetlands. The speckled alder grows in ...

Black alder, which is also known as common alder or European alder, is found in most of Europe and extends into North Africa and Asia. It is easily identified by its gummy twigs and leaves. Learn more ...