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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. Known to natives of Mexico as Ololiúqui (also spelled ololiuhqui or ololiuqui), its seeds, while little known outside of Mexico, were perhaps the most common hallucinogenic drug used by the natives.