Alnus Glutinosa, commonly known as black alder, is a tree species found in parts of Europe and Asia. It is also known by several other names including common alder, European alder, and common alder. In some regions, it is referred to as simply 'alder'. The species is known for its attractive and distinctive bark, which is smooth and grey in young trees before developing deep fissures as the tree ages. The leaves of black alder are dark green, glossy, and slightly toothed, while its small cone-like fruits are known as 'hop cones'. With its various names, this tree has a significant role in the ecosystem, serving as both a valuable timber resource and a keystone species in many ecosystems.