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United States: Opium poppies are specifically scheduled under U.S. Law. Opium and its constituent chemicals are listed in Schedule II. Seeds are specifically exempted from the list and are legal and readily available throughout the US.

Brazil: Papaver somniferum is controlled in Brazil, and requires a Ministry of Health license to cultivate.

Canada: Papaver somniferum, its preparations, derivatives, alkaloids and salts, including all of the chemicals in poppies are controlled and listed in Schedule I in Canadian law. Seeds are specifically exempted from the list and are legal and readily available throughout Canada.

Finland: Growing poppies is allowed for ornamental purposes and seeds are widely sold without restriction, but according to criminal law, growing Papaver somniferum for opiates is a crime.

Papaver somniferum
 
Drawing of P. somniferum
Taxonomical nomenclature
Kingdom Plantae
Unranked Angiosperms
Unranked Eudicots
Order Ranunculales
Family Papaveraceae
Genus Papaver
Species somniferum
Common nomenclature
Common names Opium, Ah-pen-yen, dreams
Constituents
Active constituents Morphine, Codiene, Thebaine, ect.