Definition
The 'grey alder' (*Alnus incana*) is a species of alder tree characterized by its smooth, grey bark. Unlike the common alder, its leaves are not sticky. Grey alders are commonly found in colder regions of the Northern Hemisphere. Think of it as the 'cool cousin' of the common alder. They're often used in landscaping for their attractive bark and tolerance of poor soils. They provide valuable habitat for wildlife.