Pre-Columbian purslane (Portulaca oleracea L) in the New World

@article{Byrne1975PreColumbianP,
  title={Pre-Columbian purslane (Portulaca oleracea L) in the New World},
  author={Roger A. Byrne and John H. McAndrews and John H. McAndrews},
  journal={Nature},
  year={1975},
  volume={253},
  pages={726-727},
  url={https://api.semanticscholar.org/CorpusID:4171339}
}
Conclusive evidence is presented that purslane was present in the New World in pre-Columbian times and may have been introduced to North America in the seventeenth century.
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