Psychoactive and other ceremonial plants from a 2,000-year-old Maya ritual deposit at Yaxnohcah, Mexico

PLoS One. 2024 Apr 26;19(4):e0301497. doi: 10.1371/journal.pone.0301497. eCollection 2024.

Abstract

For millennia, healing and psychoactive plants have been part of the medicinal and ceremonial fabric of elaborate rituals and everyday religious practices throughout Mesoamerica. Despite the essential nature of these ritual practices to the societal framework of past cultures, a clear understanding of the ceremonial life of the ancient Maya remains stubbornly elusive. Here we record the discovery of a special ritual deposit, likely wrapped in a bundle, located beneath the end field of a Late Preclassic ballcourt in the Helena complex of the Maya city of Yaxnohcah. This discovery was made possible by the application of environmental DNA technology. Plants identified through this analytical process included Ipomoea corymbosa (xtabentun in Mayan), Capsicum sp. (chili pepper or ic in Mayan), Hampea trilobata (jool), and Oxandra lanceolata (chilcahuite). All four plants have recognized medicinal properties. Two of the plants, jool and chilcahuite, are involved in artifact manufacture that have ceremonial connections while chili peppers and xtabentun have been associated with divination rituals. Xtabentun (known to the Aztecs as ololiuhqui) produces highly efficacious hallucinogenic compounds and is reported here from Maya archaeological contexts for the first time.

Publication types

  • Research Support, Non-U.S. Gov't
  • Historical Article

MeSH terms

  • Archaeology
  • Ceremonial Behavior*
  • History, Ancient
  • Humans
  • Mexico
  • Plants, Medicinal
  • Psychotropic Drugs / history

Substances

  • Psychotropic Drugs

Grants and funding

“The U.S. National Science Foundation (Grants BCS-1642547 [D.L.L., N.P.D., T.L.H.] and BCS-1632392 [N.P.D., D.L.L., E.J.T.] https://www.nsf.gov/; the Social Sciences and Humanities Research Council of Canada (Grants 892-2019-3070[K.R.T., N.P.D.] and 430-2017-00190 [K.R.T.]) https://www.sshrc-crsh.gc.ca/home-accueil-eng.aspx, a seed grant from the University of Calgary URGC (K.R.T.) https://www.ucalgary.ca/, the Universidad Autónoma de Campeche (A.A.H.) https://www.uacam.mx/ and the Intellectual Property Fund of the University of Cincinnati (A.A.W.) https://www.uc.edu/ provided monetary and equipment support for the research described in this paper. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Although funders from the respective universities provided support in the form of salaries for some authors [KRT, AAH, AAW], they did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. The specific roles of these authors are articulated in the ‘author contributions’ section”.