The material that this work is based upon is predominantly from the Flora Danica illustrations drawn in the period 1761-1883. Among the panels in Flora Danica 64 were chosen, that reproduces the wild plants that are usually recognized as a weed in today's gardens. These were included in the book 'Garden Weeds' (1974), where the vast majority of cuttings for 'The Butterfly Effect' are sourced. They are supplemented with a few more exotic elements like illustration of a cactus from the book "Biological Research' (1974).