Fomes fomentarius, commonly known as the tinder fungus, is a type of bracket fungus that grows on trees, particularly birch and beech. It has a hard, woody texture and a distinctive, hoof-like shape. This fungus is often found on decaying wood and can be recognized by its grayish-brown color and concentric rings. Historically, Fomes fomentarius has been used for various purposes, including as a fire starter due to its ability to smolder and produce sparks. It has also been utilized in traditional medicine and as a material for crafting items like hats and containers.