Wicked Witch of the West: "And now, my beauties, something with poison in it, I think. Something with poison in it, but attractive to the eye, and soothing to the smell. Poppies... Poppies. Poppies will put them to sleep. Sleep. Now they'll sleep!"
The cowardly lion in the poppy fields. An illustration for the Wizard of Oz, done a long long time ago.