Bracket fungus grow on a variety of native trees. The vegetative part of the fungus, known as mycelium, grows under the bark of fallen wood or living trees, and will eventually break down and rot the host tree. However, the part that can most easily be seen is the fruiting body of bracket fungus. These fruiting bodies, growing on tree trunks and fallen logs, allow the fungus to reproduce and exist to produce and liberate millions of microscopic spores.