I don't know how a 14th Century Italian could've gotten a hold of something like ayahuasca (I've read essays on how John of Patmos, the guy behind the Book of Revelation, and Ezekiel, re: the Book of Ezekiel, could've made a Middle Eastern version of the drink, but those essays rely on the fact that there were plants in those authors' environments that could be as such used; Italy's flora I'm way, way unfamiliar with). But what does the following sound like to you?
What is this round thing that Dante sees? A "Mystic Rose." But it doesn't quite look like a rose, it looks like this:
That looks a lot more like a chrysanthemum than a rose.
Dante said:I saw a light that was a river flowing,
light within light between enameled banks
painted with blossoms of miraculous spring...
... No sooner were my eyes' eaves sweetly drowned
in that bright stream to drink, than it appeared
to widen and change form till it was round. [Paradiso Canto XXX, lines 61-63 & 89-90 (John Ciardi's translation)]
What is this round thing that Dante sees? A "Mystic Rose." But it doesn't quite look like a rose, it looks like this:
That looks a lot more like a chrysanthemum than a rose.