I've heard that the two plants that make Ayahuasca (Banisteriopsis caapi and Psychotria viridis) in the Amazon, are increasingly difficult to find in the wild.
If I stage things too much and nothing changes in the act of photographing, then I might as well have not taken the picture: If the whole thing already exists in my head, then I haven't learned anything. The tension lies between the staging and the unpredictability.