It is capable of colonizing and producing spores on sterilized poppy straw ("Papaver somniferum"). The photoperiod seems to be the main determinant of flower development of "Papaver somniferum". Poppy seed is an oilseed obtained from the opium poppy ("Papaver somniferum"). Opiates are alkaloid compounds naturally found in the opium poppy plant "Papaver somniferum". In the growth development of "Papaver somniferum" six stages can be distinguished. Historians speculate this variety was "Papaver somniferum". A comparatively small amount of "Papaver somniferum" is also produced commercially for ornamental purposes. Additionally "Papaver somniferum" is rather susceptible to herbicides. Poppy straw, like opium, is harvested from the opium poppy ("Papaver somniferum"). From poppies ("Papaver somniferum"), introduced later from the Mediterranean, they may have manufactured palliative medicine. "Papaver somniferum" is an annual herb growing to about tall. It can be obtained from the opium poppy, "Papaver somniferum". A highly abundant weed species in "Papaver somniferum" fields was shown to be "Papaver rhoeas". Codeine, or 3-methylmorphine, is an alkaloid found in the opium poppy, "Papaver somniferum" var. "Papaver somniferum" shows a very slow development in the beginning of its vegetation period.