Ground mexican poppy (Argemone mexicana) is an invasive, annual weed which is found worldwide. The plant is known for it's prickly stems and yellow to pal orange flowers. The stem is erect, branched, usually prickly, pale bluish-green and exudes an unpleasant-smelling yellow sap when cut.
All parts of A. mexicana are toxic if consumed by poultry. The plant contains isoquinoline alkaloids, dehydrocorydalmine, jatrorrhizine, columbamine, and oxyberberine. The seeds contain 22-36% argemone oil which contains the toxic alkaloids sanguinarine and dihydrosanguinarine.