The cap on this mushroom is 2 inches to 12 inches wide semicircular, flat to hoof-shaped with a thick rounded margin. The upper surface is yellowish-brown to brown but becomes black as it ages. It also becomes cracked as it ages. The pore surface is yellow-brown to red-brown.
It is found on living or dead black locust trees on Prairie/History Trail near the Hermits place.
Several other polypores also develop cracks upon aging but few occur on black locust.
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