ficaria verna (ranunculus ficaria, .ranunculaceae), parasitic yellow edible mushroom on a tree trunk

macro trunk wood closeup orange yellow mushroom tree nature fungus fungi basidiomycota agaricomycetes polyporales fomitopsidaceae bracket chickenofthewoods crabofthewoods sulphur polypore shelf blooming celandine ficaria verna flora floral florescence floret flower head floweret flowering plant herbaceous herbs leaf leaves petal pilewort primrose ranunculaceae ranunculus spring sunlight wild wildflower