Killing mushrooms

[Karen]

I can't remember what type of tree it was. I believe they've been there for the past few summers. Ever year we pick them up and throw them out. but they don't stop coming up. They now are spreading from where the tree was originally.

You may want to ask around locally to see if there's a mushroomer - he or she can tell you what kind of mushrooms they are, and how to discourage them. The shrooms are now likely working on the root system - remember that a tree's root system is often even bigger and more widespread than the branches above!