Psylocibe subaeruginosa, also known as P. subaeruginosa and “subs,” is a species of psychedelic mushroom native to Australia and parts of New Zealand. Usually fruiting during autumn, it’s known for its distinctive appearance—most notably, its caramel brown cap covered in a slight golden hue.
P. subaeruginosa contains psilocybin, a famous psychedelic responsible for giving shrooms their hallucinogenic effects. Experts often agree that P. subaeruginosa is one of the most potent species, as it can contain up to 1.93% psilocybin once dried. Plus, several other psychedelic-promoting alkaloids are present in this species, such as baeocystin, nor-psilocybin, and MAOIs (1).