We didn't see it last year, but recent wet weather has apparently caused the fungi to return.
|One of the fungi at my foot (size 7).|
I think this is called Armillaria root fungus of some kind, though a friend thinks it might be this kind of fungus: http://www.first-nature.com/fungi/trametes-gibbosa.php.
It really doesn't matter which it is; both mean the tree is stressed. There does not seem to be a cure for either kind of fungus, that I can find.
|Fungi on the other side of the oak tree.|
Supposedly, it can take years for the fungus to kill a tree, but sometimes it happens quickly.
I sure would hate to lose this old oak.