Amanita muscaria, commonly known as the fly agaric or fly Amanita is a poisonous and psychoactive basidiomycete fungus, one of many in the genus Amanita. Native throughout the temperate and boreal regions of the Northern Hemisphere, Amanita muscaria has been unintentionally introduced to many countries in the Southern Hemisphere, generally as a symbiont with pine plantations, and is now a true cosmopolitan species. It associates with various deciduous and coniferous trees. The quintessential toadstool, it is a large white-gilled, white-spotted, usually deep red mushroom, one of the most recognizable and widely encountered in popular culture. Edmund Michael (born 1849 , m. 1920 ) was a German mycologist. He studied agronomy in Leipzig , and will be a teacher at the Agricultural Academy of Auerbach ", in 1884. His major contribution was the publication of a " Field Guide Führer für Pilzfreunde "