Lichen this fence art

I had a dentist appointment this morning, just a cleaning, and zipped into town after it to get this photo and the one in the extra. We saw this fence when we walked around town a few days ago, and I knew I'd go back for a photo for blip. Now, thanks to the artist and to Google, I know what this kind of lichen that's so common here is called! I'm assuming that Skuzzabo is the artist. I really like the poem too. 
"Seaside Bone Lichen is a foliose (leafy) lichen that grows on trees and resembles a small (5-8 cm) bush of pale grey and finely branched lobes."