Moss (Bryum capillare)
This moss forms lovely silvery green carpets, you almost expect to able to turn the corner over and see the Axminster or Wilton label underneath it!
Not only is it common and found all over the place it is one of the more easy mosses to identify because of its silvery and almost catkin like 'stems'.
From early spring through to summer it produces frequent tiny pear shaped fruits. They appear on dark red stalks that shoot up from within the green carpet and for a while the carpet develops red-tinged patches (but not because someone has spilt wine it!).