Fir refers to several evergreen trees in the genus Abies, native to cool and mountainous regions of the Northern Hemisphere. These conifers are characterized by tall, straight trunks and symmetrical conical crowns. The needles are flat, soft, and usually blunt at the tip, attaching directly to the branch. When crushed they release a strong, pleasant resinous aroma. A distinctive identifying feature of fir trees is their upright cones, which grow vertically on the branches and disintegrate when mature rather than falling intact. Depending on the species, fir trees may grow from 10 to over 80 meters tall and can live for several centuries. Fir species are important components of boreal and mountain forests where they help stabilize soils and provide habitat for wildlife. Their wood is lightweight and widely used in construction, paper production, and musical instruments. Several species are also cultivated as ornamental trees and are among the most widely used Christmas trees. The needles, bark, and resin contain aromatic compounds and volatile oils that have long been used in traditional herbal practices. These materials have been used to support respiratory health, soothe sore muscles, and promote circulation, giving fir an enduring place in northern herbal traditions.