microscopic lichen lichenes symbiosis of algae or cyanobacteria and fungi. crustose lichens and foliose lichen. macro close-up

algae among apothecia apothecium arises background bark biology botany closeup composite crustose cultivation cyanobacteria drippy filaments flora foliose forest from fruticose fungi green greenery growth lichen lichenes lichens living macro matte microcosm microscope microscopic moist multiple nature organism plant recesses relationship research round science scurf symbiosis symbiotic texture wildlife with wood young