Shelf fungi, also known as bracket fungi, are a type of fungus that grow on the sides of trees, logs, and other surfaces. They have a distinctive shelf-like shape, often resembling shelves or brackets, and can vary in color and size. These fungi play an important role in the ecosystem 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 many environments, from forests to urban areas, and are often seen during the warmer months. Some species are edible, while others can be toxic, making identification important for foragers.