Common name: Wavy caps
Active compounds: Psilocybin, psilocin, baeocystin
Cap size: 1.5–5 cm wide, with wavy edges when mature
Distribution: Temperate regions of Europe, North America, and Australasia
Habitat: Wood chips, mulch, and other lignin-rich substrates
Psilocybe cyanescens, commonly called “wavy caps,” is a species of psychoactive mushroom in the family Hymenogastraceae. It is known for its distinctively undulating cap margin and potent content of the hallucinogenic compounds psilocybin and psilocin, which give it both cultural and scientific significance.