small fly agaric with curved white stem and red domed cap with f

acid agaric alkaloid amanita bent cap characteristic chemical compounds content convex curved danger domed famous fly fungi fungus hallucinogenic ibotenic inedible inesculent little magic muscaria muscarine muscazone muscimol mushroom mycology mycorrhiza natural nature organic organism outdoor plant poisonous psychoactive red small species spots spotted toadstool toxic typical uneatable white wild