Lichens / Korstmos

After overlooking them for half a century, I started noticing lichens and they amaze me by their timid splendor. Fungus and algae symbiotically creating wild variations of appearance and color, hues and textures, settling unobtrusively on places that seem hard to survive on. Growing so slowly... You can't buy them and plant them on your trees or garden wall, you can only provide spots for them to come to you and then hope they do.
While hiking in Germany, standing on a panoramically high spot overlooking the long deep Diemelsee valley, a reservoir lake resting deep down like a lazy dark blue snake, there's a tree behind me and just above the roots there's a small green spot. In contrast with the massive panorama, there's this tiny world of curves and folds, more impressive really.
And on a gravestone on the ancient graveyard of Korbach, a patch of lichen the size of a thumbnail, bland to the naked eye, with the tiniest of black dots, turns out to be a small city where black insects have invaded the green, gorging themselves on something below the skin.
I bought a Dutch field guide for lichens. My plan is to take pictures, post them here and work with the guide to collect names and infomation about the finds.


I assume this is Evernia prunastri (in Dutch: Eikenmos, Gewoon geweimos).