Hi everyone, I am very thankful I found this forum. I have been reading up on some of this stuff since yesterday evening trying to determine my problem, but I get more worried as I look because I see nothing that resembles what my pin oak has growing around the base of it. :-/ I need to take a couple pics and post, but I thought I would go ahead and ask. I have two huge pin oaks in my front yard. One is fine, the other has this hard white/brown fungus of some sort growing around the base of it. I noticed this a couple weeks ago and it is now growing and spreading around the entire base of the tree. It's nothing like I have seen, it is nothing like mushrooms, although I do have some mushrooms growing in my front yard. These trees are big and create a lot of shades, I think this is the reason for the mushrooms growing. It takes a while for the ground to dry and we have been having major storms and heavy downpours here for almost a month. I am in parkersburg, WV. This, what I assume is fungus, is like a glob growing on top of the ground at the base of the tree, it's not growing on the tree, its growing on the ground. Its white/brown almost an awful looking yellow color. My husband probed at it with a tree limb and it has a hard shell, he could not get the stick to puncture it. It's disgusting and I'm afraid it's going to kill the tree. Has anyone ever seen anything like this. I will get some pics ASAP and add, does anyone have any suggestions without pictures?? Any help is greatly appreciated.