Doing research of other similar art I cam across the following on Google images under Psychedelic art, magic mushrooms and pot art.
A couple important facts about this art form, the colors have to be so wrong it makes one go blind, and if it has words in the painting and you can still read the words, they are not wild enough.
This is an album cover from Jefferson Air Plane.
And this is the cover of the Beatles greatest album Sergeant Pepper's Lonely Hearts Club Band. Not so much of the Psychedelic art but the music was best listened to if one was a wee bit blotto.