yellow lichen, xanthoria parietina, and green grey lichen, physcia adscendens, on tree branches

algae background bark beautiful biology botanical botany branch bright carbon closeup common cyanobacteria detail ecology ecosystem environment flora forest fungal fungi fungus genus lichen lichens macro maritime moss mushroom nature orange outdoor parietina pattern photosynthesis plant rustic shore sunburst surface symbiosis symbiotic texture textured tree trunk unpolluted wood xanthoria