Alnus Crispa, commonly known as the "serrated alder," is a deciduous tree native to North America. This tree is characterized by its serrated leaves, which are dark green on top and lighter underneath. The tree produces small, cone-like fruits that hang from the branches. The bark of the tree is smooth when young but becomes rougher as it matures. In addition to being called the serrated alder, Alnus Crispa is also known by several other names, such as the "hazel alder," "tag alder," and "speckled alder." These names reflect the tree's many qualities and uses in various cultures and environments.