The pollen of the oriental poppy , `` Papaver orientale '' , is dark blue , that of the field or corn poppy ( `` Papaver rhoeas '' ) is grey to dark green .
The pollen of the oriental poppy , `` Papaver orientale '' , is dark blue . The pollen of the field poppy or corn poppy ( `` Papaver rhoeas '' ) is dark blue to grey .