On Skye a week ago brought my first sighting of a large lichen that I may have seen before, but never bothered to take note of. Lobaria pulmonaria or Lungwort is quite common in the damp, comparatively mild western highlands. It prefers sheltered damp lochside woodland. It is now very rare in our north eastern areas.
My photo has some moss growing in the middle of the rosette, but the lichen is quite distinctive and large - this rosette was about 12cm across.