Tree Burl with Cracked Bark and Star-Shaped Fissures on a Trunk

A close-up of a large burl on a tree trunk, the dark brown bark thick, rough, and deeply cracked into blocky plates, with radial star-shaped fissures in its center where an old branch stub has healed over, the upper side dusted with pale brown wood powder from boring insects and dotted with patches of green moss, showing the tree's natural self-repair after injury.