Muscimol is one of the psychoactive compounds responsible for the effects of "Amanita muscaria" intoxication. The same could happen with poisonous mushrooms, such as amanita muscaria. Other entheogenic fungi, such as "Amanita muscaria", have also been suggested. It could be confused with the poisonous fly agaric ("Amanita muscaria"). Found among the poisonous species are Amanita gematta, Amanita muscaria and Amanita pantherina. The album cover image is of a fly agaric mushroom ("Amanita muscaria"). In his 1967 book, Wasson argues that Soma was "Amanita muscaria". This act outlaws preparations of the "Amanita muscaria" intended for human consumption, including muscimol. "Amanita muscaria" is the type species of the genus. Non-Indian researchers have proposed candidates including Amanita muscaria, Psilocybe cubensis, Peganum harmala and Ephedra sinica. Among these is "Amanita muscaria", the fly agaric. The muscimol-containing Amanita muscaria mushroom was used for ritual purposes throughout prehistoric Europe. This tree commonly grows with the mycorrhizal fungus "Amanita muscaria" in a mutualistic relationship. As other "amanita muscaria", the guessowii variety contains ibotenic acid and muscimol toxins. The iconic fly agaric ("Amanita muscaria"), hallucinogenic toadstool, has been recorded within the forest.