Cultivated variety

Blue Meanie

Psilocybe cubensis (name also applied to Panaeolus cyanescens — a different species)

aka Blue Meanies

A name worth untangling before anything else. Blue Meanie was historically the nickname for Panaeolus cyanescens, a separate dung-loving species. Believed to stem from a spore-vendor labelling mix-up in the 1980s, the name also attached to a Psilocybe cubensis variety, and both usages have circulated ever since. Most material sold as Blue Meanie today, and most lab-tested samples under the name, turn out to be cubensis.

Field marks

Medium caramel-brown caps
Bruises blue heavily
Denser flesh than typical cubensis
Thicker stem than P. cyanescens

Origin & lineage

Cubensis variety of undocumented origin, name applied since the 1980s; distinct from the true Panaeolus cyanescens 'Blue Meanie', a dung-associated species with its own documented range.

Relative potency

variableRelative only — this guide gives no dosing guidance.

Lookalikes — read this twice

The lookalike problem here is the name itself. Cubensis Blue Meanie is routinely confused with true Panaeolus cyanescens — an unrelated species with a taller, thinner stem, smaller caps, and meaningfully higher average psilocybin content in tested material. The two are separable by stem thickness and overall bulk, but the shared name makes casual identification unreliable.

Deadly species grow in the same places as psilocybin ones and can resemble them closely. Never eat a wild mushroom identified from a website — including this one.