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Those involved with the database say it forms a key research resource for academics working in ecology and archaeobotany.

"Coast Salish traditional perspective was the entire context for understanding the study's findings," said Kistler, the museum's curator of archaeobotany and archaeogenomics.

Other regions where evidence of ancient cannabis use has emerged include the lands of the ancient Scythians in Siberia and similarly old sites in China, where hints of recreational use have been discovered, says study author Hongen Jiang, professor of archaeobotany at the University of the Chinese Academy of Sciences.

“Pretty soon after the beginning stages of domestication, people are already moving this new crop over huge distances, even before the evolutionary process of domestication has fixed all the traits favored by humans,” said Logan Kistler, curator of archaeogenomics and archaeobotany at the Smithsonian Institution’s National Museum of Natural History in Washington.

As the focus of ethnobotany and archaeobotany, plants yield invaluable insights into the past.