“Cyanescens” means “becoming blue,” and it is the species epithet for both the wavy-cap, Psilocybe cyanescens, and The Blue Meanie, Panaeolus cyanescens. Both do become blue if bruised. Both are also psychoactive, but they are very different species. So, Blue Meanie (Panaeolus cyanescens), Wavy-Cap (Psilocybe cyanescens), and Psilocybe cubensis “Blue Meanie” are all distinctly different species, and while all do contain psilocybin, their potency varies dramatically so dosing is different.
 
In North America, most common in California, Oregon, Washington, and British Columbia, though sometimes present in the east as well