It doesn't sound like they would do any damage to the daylilies. I'm not sure what to say about the tree, more because of the fungus than anything. Trees often seem to survive for some time even with fungi growing on them. If the fungus comes back maybe you could post a picture of it but it may be an indication of a problem.
sooby said:It might be worth posting the picture to the fungi forum here on NGA, someone may know what it is: