In flowers include Narcissus, Fritillaria imperialis, Papaver rhoeas and other beautiful flowers. The "poppy red" refers to "Papaver rhoeas". The following mechanism was described in detail in "Papaver rhoeas". A highly abundant weed species in "Papaver somniferum" fields was shown to be "Papaver rhoeas". The poppy of wartime remembrance is "Papaver rhoeas", the red-flowered corn poppy. Rhoeadine (rheadine) is an alkaloid derived from the flowers of the corn poppy ("Papaver rhoeas").