Firs are evergreen trees belonging to the genus Abies, which are part of the Pinaceae family. They are characterized by their needle-like leaves, which are typically flat and arranged in a spiral pattern. Firs can grow to be quite tall, with some species reaching heights of over 200 feet. They are commonly found in mountainous regions and are known for their conical shape. These trees produce cones that hang down from their branches, unlike other conifers whose cones may stand upright. Firs are important for their ecological role, providing habitat for various wildlife and contributing to forest ecosystems. They are also valued for their wood, which is used in construction and furniture making.