It can be closely associated with Psilocybe semilanceata and Psilocybe pelliculosa. Psilocybe strictipes is commonly bewildered with Psilocybe semilanceata and can be differentiated by its deficiency of a papilla in addition to a convex to subumbonate cap. "Strictipes" comes from the Latin text stricti (slender) and pes (foot). According to https://directory-farm.com/listings12493070/top-latest-five-rusty-white-mushrooms-urban-news