Polypores are a type of fungi that typically grow on wood and are known for their shelf-like appearance. They belong to the class Agaricomycetes and are characterized by their porous undersides, which release spores for reproduction. These fungi play a crucial role in ecosystems by breaking down dead and decaying wood, contributing to nutrient cycling. Commonly found in forests, polypores can vary in size, shape, and color. Some well-known species include Ganoderma lucidum, often used in traditional medicine, and Fomes fomentarius, which has been used historically to create fire-starting materials.