branches of a tree with a green parasitic fungus called lichen. a detailed image of green lichen on a tree branch. close

background bark beautiful biology blurred botany braid branch brown closeup colony common detail dry ecology ecosystem environment flora forest fungi fungus garden lichen lichens macro moss mushroom natural nature oakmoss parietina parmelia plant pollution prunastri rough shore sulcata sunburst symbiotic taylor teloschistaceae texture tree trunk wood xanthoria yellow