Comment by Aloisius

I'm not sure a vague passage from 1700 years ago is much in the way of evidence, especially given he claims the mushroom is a 10 inch tall person riding a carriage which you see before you consume it.

Of course, he also claimed another mushroom would let you live for a millennia without aging, there were 1,000 year old white bats flying around and 10,000 year old horned toads and that eating 200 pounds of jade would make you fly, so... a fair bit of fantasy mixed into his works.