Corn Poppy (Papaver Rhoeas) or Red Poppy, a flower with vivid red four petals, most commonly with a black spot at their base. is the national flower of Poland. It is a variable annual plant in the northern hemisphere and generally flowers in late spring. During and after World War I, fields that had been disturbed by battle bloomed with Corn Poppies, and the flower has become a symbol of that war.