Oak Mazegill Polypore

Oak Mazegill Mushroom

Oak mazegill is a mushroom that grows in heartwood or already rotting wood. These types of stemless mushrooms are called conks. The top of the conk grows in various shades of brown. The underside starts off as porous, but forms slits that look like an elaborate maze as it ages. Fruiting bodies can grow to be 1-8 inches in diameter and 3 inches thick.

Upper side of end of log.

Underside of end fungus.

Fomitopsis quercina is a species of mushroom in the order Polyporales. Commonly known as the thick-walled maze polypore, maze-gill fungus, oak-loving maze polypore, or oak mazegill, the specific epithet refers to the oak genus Quercus, upon which it frequently grows, causing a brown rot. 

Cluster of mazegill fungus.

At least 8 mazegill fungus on this log.