Details: This poster is of a print called Flower Child. It shows a cloud of people who were famous or influential in the 1960s.
Flower child or Flower Children originated as a synonym for hippie, especially the idealistic young people who gathered in San Francisco and environs during the 1967 Summer of Love. It was the custom of "flower children" to wear and distribute flowers or floral-themed decorations to symbolize altruistic ideals of universal brotherhood, peace and love. The mass media picked up on the term and used it to refer in a broad sense to any hippie.