Lest we forget! Remembrance Day is symbolized by the artificial poppies that people wear and place at war memorials. The poppies may be worn or placed singly or as wreaths. The use of the poppy as a symbol of remembrance comes from a poem written by John McCrae, a Canadian doctor serving in the military. The poem is called In Flanders Fields and describes the poppies growing in the Flemish graveyards where soldiers were buried.