Papaver rhoeas (common names include common poppy, corn poppy, corn rose, field poppy, Flanders poppy, or red poppy) is an annual herbaceous species of flowering plant in the poppy family, Papaveraceae. This poppy is notable as an agricultural weed (hence the common names including "corn" and "field") and after World War I as a symbol of dead soldiers. Before the advent of herbicides, P. rhoeas sometimes was abundant in agricultural fields. Although the corn poppy (and its cultivars such as the Shirley poppy) and the California poppy are widely grown in gardens, only Papaver somniferum, the opium poppy, has significant farm production.