Papaver rhoeas The memorial flower of the American Legion since 1921, blooms of these poppies covered the fields of Europe in the spring of 1919. Kept from blooming by the disturbances of the first World War, when they finally were able to bloom they did so in such abundance that they were seen as a remembrance of those who had been lost. Gorgeous. 12-16 inches. Full sun. Re-Seeding annual. 200+ seeds.