коллективное сознание(comment by ART Vancouver: правильный вариант: the concept of morphogenic fields and the collective consciousness of plant species)
повальная истерия(refers to collective delusions of threats to society that spread rapidly through rumors and fear. In medicine the term is used to describe the spontaneous manifestation of the same or similar hysterical physical symptoms by more than one person Alex_Odeychuk)
исчезнуть из коллективной памяти(о событии, происшествии: In 2014, Malaysian Airlines flight MH370 captured the world's attention as it seemingly vanished without a trace. For weeks, it dominated conversations, but with time, it gradually faded from collective memory.coasttocoastam.comART Vancouver)