Many plants that contain psychoactive substances with stimulating or hallucinogenic properties, as well as preparations made from those plants, have traditional uses in some countries or regions; for example, some are used in religious rites. Under the 1961 Convention and that Convention as amended by the 1972 Protocol, plants that are the sources of narcotic drugs, such as cannabis plant, opium poppy and coca bush, are subject to specific control measures. In contrast, although some active stimulant or hallucinogenic ingredients contained in certain plants are controlled under the 1971 Convention, no plants are currently controlled under that Convention or under the 1988 Convention. Preparations (e.g. decoctions for oral use) made from plants containing those active ingredients are also not under international control. Examples of such plants or plant material include khat (Catha edulis), whose active ingredients cathinone and cathine are listed in Schedules I and III of the 1971 Convention; ayahuasca, a preparation made from plants indigenous to the Amazon basin of South America, mainly a jungle vine (Banisteriopsis caapi) and another tryptamine-rich plant (Psychotria viridis) containing a number of psychoactive alkaloids, including DMT; the peyote cactus (Lophophora williamsii), containing mescaline; magic mushrooms (Psilocybe), which contain psilocybine and psilocine; Ephedra, containing ephedrine; “kratom” (Mitragyna speciosa), a plant indigenous to South-East Asia that contains mitragynine; iboga (Tabernanthe iboga), a plant that contains the hallucinogen ibogaine and is native to the western part of Central Africa; varieties of Datura containing hyoscyamine (atropine) and scopolamine; and Salvia divinorum, a plant originating in Mexico that contains the hallucinogen salvinorin A.