Help - what is it?

Along one side of our garden we have a line of bushes that act as a sort of low hedge between us and the neighbours.

Just spotted these - there are absolutely loads of them in the grass all along this side, but where the bushes stop so do they so there's obviously a relationship between the two.

Unfortunately, I've never been able to identify the bushes but I've just identified the bushes as Cornus Alba Sibirica and I'm hoping someone can now identify the fungi for me!