pesa strain psilocybe cubensis - This is a picture of the P.E.S.A Strain of psilocybe cubensis cultivated at home. Many other species of mushrooms can be easily cultivated at home. The P.E.S.A strain is a hearty deep bluin mushroom when bruised with a medium sized cap, usually comprised of a thick fleshy stem. They provide a highly medicinal experience and were highly regarded by many ancient civilizations for there effects.