Rivea corymbosa (common synonym: Turbina corymbosa), is a species of morning glory, native throughout Latin America from Mexico in the North to Peru in the South and widely naturalised elsewhere. In 1941, Richard Evans Schultes first identified ololiuhqui as Rivea corymbosa and the chemical composition was first described on August 18, 1960, in a paper by Dr. Albert Hofmann. The seeds contain ergine (LSA), an ergoline alkaloid similar in structure to LSD.

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