Tom Kramer et al. Chouvy P.A., 2009, "Opium. Uncovering the Politics of the Poppy", London, I.B. Tauris (Cambridge, Harvard University Press: 2010) Herbs Medicinal plants Morphine Opium Entheogens Soma (drink) somniferum Plants described in 1753 Taxa named by Carl Linnaeus Flora of Malta