how did it get its name?
The name in many European languages is thought to derive from its use as an insecticide when sprinkled in milk. Its scientific name was, however, given by Linnaeus and Lamarck.
Amanita muscaria
The name of the mushroom in many European languages is thought to derive from its use as an insecticide when sprinkled in milk. This practice has been recorded from Germanic- and Slavic-speaking parts of Europe, as well as the Vosges region and pockets elsewhere in France, and Romania. Albertus Magnus was the first to record it in his work "De vegetabilibus" some time before 1256, commenting "vocatur fungus muscarum, eo quod in lacte pulverizatus interficit muscas", "it is called the fly mushroom because it is powdered in milk to kill flies."

The 16th-century Flemish botanist Carolus Clusius traced the practice of sprinkling it into milk to Frankfurt in Germany, while Carl Linnaeus, the "father of taxonomy", reported it from Småland in southern Sweden, where he had lived as a child. He described it in volume two of his "Species Plantarum" in 1753, giving it the name "Agaricus muscarius", the specific epithet deriving from Latin "musca" meaning "fly". It gained its current name in 1783
what is the red mushroom with white dots Amanita muscaria
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Amanita muscaria [SEP] Taxonomy and naming
The name of the mushroom in many European languages is thought to derive from its use as an insecticide when sprinkled in milk. This practice has been recorded from Germanic- and Slavic-speaking parts of Europe, as well as the Vosges region and pockets elsewhere in France, and Romania. Albertus Magnus was the first to record it in his work "De vegetabilibus" some time before 1256, commenting "vocatur fungus muscarum, eo quod in lacte pulverizatus interficit muscas", "it is called the fly mushroom because it is powdered in milk to kill flies." The 16th-century Flemish botanist Carolus Clusius traced the practice of sprinkling it into milk to Frankfurt in Germany, while Carl Linnaeus, the "father of taxonomy", reported it from Småland in southern Sweden, where he had lived as a child.