When rubber industrialists wiped out the people living in the area, those that remained lost generational knowledge. Ethnobotanists like Shultes explored the Amazon afterwards.
There's even a movie made on the subject of exploring the Amazon for medicines with Sean Connery, Medicine Man. Also, the more recent Embrace of the Serpent.
https://en.wikipedia.org/wiki/Putumayo_genocide
When rubber industrialists wiped out the people living in the area, those that remained lost generational knowledge. Ethnobotanists like Shultes explored the Amazon afterwards.
There's even a movie made on the subject of exploring the Amazon for medicines with Sean Connery, Medicine Man. Also, the more recent Embrace of the Serpent.