Amanita muscaria is a cosmopolitan mushroom , native to conifer and deciduous woodlands throughout the temperate and boreal regions of the Northern Hemisphere , including higher elevations of warmer latitudes in regions such as Hindu Kush , the Mediterranean and also Central America . A recent molecular study propose that it had an ancestral origin in the Siberian – Beringian region in the Tertiary period , before radiating outwards across Asia , Europe and North America . The season for fruiting varies in different climates : fruiting occurs in summer and autumn across most of North America , but later in autumn and early winter on the Pacific coast . This species is often found in similar locations to Boletus edulis , and may appear in fairy rings . Conveyed with pine seedlings , it have been widely transported into the southern hemisphere , including Australia , New Zealand , South Africa and South America , where it can be found in the southern Brazilian states of Paraná and Rio Grande do Sul .