Andy Rodker's photos with the keyword: fungus

(HFF 2) Madrid, Rio Manzanares, Puente de Los Franceses, GR10 waymark on tree not noticed when I took the shot but it indicates that we are on the path crossing the peninsula from Valencia to Lisbon. I think the fungal growth above the waymark is a common species but I have no knowledge of these things. Perhaps someone will know what it is.