green and yellow lichen on an old tree branch. hypogymnia physodes, evernia prunastri and xanthoria parietina are common lichen.

algae autumn background bark biology blue botany branch bright close closeup cold color common copy detail ecosystem environment evernia foliose forest fungus garden green growth habitat hypogymnia leaf leprose lichen lichens living macro moss nature old orange organism outdoor overgrown parasite parasitic parietina partner photosynthesis physodes plant prunastri space species spring springtime symbiosis symbiotic teloschistaceae temperature texture tree twig vegetation winter wood woodland xanthoria yellow