jack o lantern mushroom, omphalotus olearius

autumn bark bioluminescent body caespitose cap clitocybe close closeup daylight decaying environment europe fast field fruit fungus gilled growing grows growth hats italy jack lamellae lantern marasmiaceae mushroom mycology natural nature old olearia olearius olive oliveto omphalotus orange organic organism outdoor plant poisonous season seasonal shadow soil stipe stumps terni toxic tree trunk umbria wild