There have been some reports of finding morphine in plants other than Papaver somniferum but they were later found to be incorrect. Fulton ( ) concluded in 1944 that. "At most, two or three very close relatives of P. somniferum (in the section Mecones of genus Papaver) possibly also produce morphine, but as they have not been analysed even this extension is in doubt and it is really probable only for Papaver setigerum" and further, "of some twenty-eight species of Papaver that have been examined for chromosome numbers, only P somniferum and P. setigerumhave the number 11 or a multiple [of this number] ( ) Perhaps these are the only opium poppies. It seems fairly certain that Papaver setigerum is a true opium poppy; yet there do not seem to be any reports of actual chemical analyses". Fulton's statements summarize the facts which led to the investigation contained in this document.
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