Here is an interesting TED Talk on fungi and their importance in our world.
Fungi ,psychedelic or not , can save the plant
if you have time watch ''fantastic fungi'' with Paul Stamets on netflix
Thus, looking outside the "psychedelic" side, as was said, this film is indeed worth the watch - again, outside the subject matter of the Psychedelic thread.
Q: (L) Carlos Casteneda writes about the peyote {fungi} beings called "Mescalitos." This being supposedly is part of the peyote plant, a sort of being from the plant. Is this true?
A: No.
Q: (L) What beings does one encounter when one eats a bunch of peyote?
A: Hallucination.
Q: (L) Why are these hallucinations so consistent?
A: Because those that do have that expectation. If you ate enough peyote you would encounter Santa Claus if that was your expectation. (Much laughter)
peyote is not a fungi ...it is a cactus
Psilocin is a high-affinity agonist at serotonin 5-HT2A receptors, which are especially prominent in the prefrontal cortex. It increases cortical activity secondary to down-stream postsynaptic glutamate effects. It is also active at 5-HT1A, 5-HT1D, and 5-HT2C receptors, although these are thought to play a lesser role in its effects. In the presence of the 5-HT2A antagonist ketanserin, the changes in mental state that psilocybin typically causes do not occur.258 Although psilocybin has no affinity for dopamine D2 receptors, a PET study using the D2 receptor ligand raclopride showed that psilocybin increases dopamine transmission in the striatum, probably through secondary increases in dopamine.259,260 Some psilocybin-containing mushrooms contain phenylethylamine, which may contribute to sympathomimetic effects.