In the first book of the series, titled "The Teachings of Don Juan", Carlos is introduced by Don Juan to smoking a mixture of 3 parts mushrooms and 1 part of floweres and leaves.
Has anyone tried something similar?
I have read that heat destroys psilocybin, but nevertheless in the book it worked.
Here is the book. You can see the entry of Saturday, 27 January 1962 for some context
https://selfdefinition.org/shaman/Carlos-Castaneda-Teachings-of-Don-Juan.pdf