Lichens

I nearly passed by these whitish lichens growing on Swamp Maple as I placed most interest on the blues and greens. Pulling in closely revealed something like a moonscape of tiny growths and craters. It's not clear to me how many different species might be included here.

Here are the lichens that originally captured my eye. I particularly wanted this shot as it showed at least two species. I noticed how not only the coloring differed but the leaf-like growth structures as well.