Just as all crops get started from seeds, mushrooms commence as spores. Spores contain the genetic substance necessary to develop various subspecies of mushrooms. Possession of psilocybin is illegal inside the US. Psilocybin is just not present in spores by themselves, but it'll build later on since the mushroom grows. https://franciscoi38kz.tribunablog.com/new-step-by-step-map-for-psilocybin-spores-43100036