New Zealand material of Papaver somniferum subsp. setigerumand subsp. somniferum contains codeine, morphine, papaverine, and narcotine. The samples studied had morphine at lower levels and codeine at higher levels in subsp. setigerum. Because the two entities are morphologically similar and have qualitatively similar alkaloid content, although they differ in chromosome number, we recommend that both continue to be treated as subspecies of Papaver somniferum.
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