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.