Shelf fungi, also known as bracket fungi, are a type of fungus that grow on the sides of trees, logs, and other surfaces. They are characterized by their shelf-like appearance, often forming layers or brackets that extend outward. These fungi play a crucial role in ecosystems by breaking down dead wood and recycling nutrients back into the soil. Shelf fungi belong to the group of fungi called basidiomycetes, which reproduce through spores. They can be found in various habitats around the world and come in many shapes, sizes, and colors. Some species are edible, while others are toxic, making it important to identify them correctly.