Opium

Opium is a narcotic drug, which that is obtained from the unripe seed pods of the opium poppy? (Papaver somniferum). To harvest opium, the skin of the ripening pods is scored by a sharp blade. The slashes exude a white, milky latex which dries to a sticky brown material that is scraped off the pods as raw opium.

see also [Opium Wars]?, opiates