Evolution
''A. nervosa'' is a rare example of a plant whose putative hallucinogenic properties were not recognized until recent times. While several of its cousins in the Convolvulaceae family, such as ''Rivea corymbosa'' and ''Ipomoea tricolor'' , were used in shamanic rituals of Latin America for centuries, ''A. nervosa'' was not traditionally used for this purpose. Its properties were first brought to attention in the 1960s, despite the fact that the chemical composition of its seeds is nearly identical to those of the two species mentioned above, and the seeds contain the highest concentration of psychoactive compounds in the entire family.References:
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