I’ve just found this on coursera and since I have some time on my hands decided to start it, even though I don’t live in the area that is covered and so I don’t have access to all the plants introduced there. I do however have a great interest in indigenous traditional methods of healing and this sounds really interesting. They also have three additional modules about curanderismo that are not referring to plants. It’s offered by the University of New Mexico and you can take it for free.