I love lichens [pronounced LIKE-ens]. I think they're gorgeous.
I don't know anything about the ones in this pic, but they're pretty and big - about the size of your palm.
I'll be doing more posts about lichens since they grow on everything around here - the trees, the house, the rocks, the gravestones, etc. and they keep popping up in pics anyway.
I need to do some research on these and learn about the different kinds. I'll let you know what I find out.