Papaver californicum, the only annual species of the genus Papaver native to North America is described and mapped. Because of the annual habit, color of filaments and valvate capsules it is placed in ...

Jörg Ziegler, María Luisa Diaz-Chávez, Robert Kramell, Christian Ammer, Toni M. Kutchan, Comparative macroarray analysis of morphine containing Papaver somniferum and eight morphine free Papaver ...