Distribution and habitat
Singer noted that Psilocybe cubensis had psychoactive properties in 1949. In Australia, use of psychoactive mushrooms grew rapidly between 1969 and 1975. In a 1992 paper, locals and tourists in Thailand were reported to consume P. cubensis and related species in mushroom omelettes—particularly in Ko Samui and Ko Pha-ngan. At times, omelettes were adulterated with LSD, resulting in prolonged intoxication. A thriving subculture had developed in the region. Other localities, such as Hat Yai, Ko Samet and Chiang Mai, also had some reported usage.