I found this fungus on a tree at Leven Canyon today. I did not measure it but I'd estimate they are each is about 7 - 8 mm in diameter.I have no idea what it is yet as I'll need to get to the library. However, even more interesting are the little mites. As is often the case, I did not notice these until getting home which is a pity as I would have liked to have tried for a closer shot.
If anyone knows more about either species I be glad to here from you.