a lichen is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species.

algae arises bark bodies branch bush close close-up color common composite copy cyanobacteria day detail ecosystem environment filaments focus foliose forest fungi fungus gray growing growth hypogymnia lichen limoux living macro moss mossy multiple mushroom natural nature nice organism outdoor parietina physodes plant scale season slovakia small space species summer symbiotic textured thallus tourism trail tree trunk unobtrusive wood xanthoria