Texas Acacia
Methamphetamine has been reported to occur naturally in Acacia berlandieri, and possibly Acacia rigidula, trees that grow in West Texas. Methamphetamine and amphetamine were long thought to be strictly human-synthesized, but Acacia trees contain these and numerous other psychoactive compounds (e.g., mescaline, nicotine, dimethyltryptamine), and the related compound β-phenethylamine is known to occur from numerous Acacia species.
The findings, however, have never been confirmed or repeated, leading
some researchers to believe the results were the result of
cross-contamination.