Alder is a type of tree that belongs to the genus Alnus. These trees are commonly found near water sources, such as rivers and lakes, and are known for their ability to improve soil quality. Alder trees have distinctive, rounded leaves and produce small, cone-like fruits called catkins. They are often used in landscaping and can grow quite tall, providing shade and habitat for various wildlife. In addition to their ecological benefits, Alder wood is valued for its durability and attractive appearance. It is often used in furniture making, cabinetry, and even in the production of musical instruments. The tree's bark and leaves have also been used in traditional medicine, showcasing its versatility and importance in both nature and human use.