Postia placenta is a type of wood-decaying fungus commonly found in temperate forests. It primarily decomposes dead wood, playing a crucial role in nutrient cycling within ecosystems. This fungus is known for its ability to break down lignin, a complex organic polymer found in plant cell walls, which helps in the decay process. The fruiting body of Postia placenta appears as a white to cream-colored shelf-like structure on decaying wood. It is often studied for its potential applications in bioremediation and biotechnology, as it can help in the breakdown of environmental pollutants and contribute to sustainable practices in forestry.