Lichen and NOT Moss

Well, the beautiful weather we've been having down here has finally decided to change. This afternoon, the clouds started rolling in and it has started spitting. It felt like 6pm at 2pm, it was so dull and grey. We decided to stay in rather than go to the beach.

This lichen is growing on a number of trees in the garden. The OTHER lichen just coats the branches. Great indicators of low pollution.

Edit: Thank you, ceridwen.