Polyporus is a genus of fungi that belongs to the family Polyporaceae. These fungi are commonly found on decaying wood and are known for their distinctive, shelf-like fruiting bodies. They play an important role in the ecosystem by breaking down dead plant material, contributing to nutrient cycling. Many species within the Polyporus genus are characterized by their porous undersides, which release spores for reproduction. Some species are edible, while others may be inedible or even toxic. Their diverse habitats and forms make them an interesting subject of study in mycology, the science of fungi.