xanthoria parietina - multiplying yellow-green lichen on the trunk of an old tree, odessa

algae bark biodiversity biology botany branch closeup conservation crustose detail detailed ecology environment foliose folioselichen forest fungi fungus gray green growth habitat intricatepattern lecanoromycetes lichen lichens macro microhabitat microscopic moss native natural nature organic organisms pattern physcia physciaceae species spores surface symbiosis taxonomy texture thallus tree wildlife