Cleve Backster - Primary Perception: https://en.wikipedia.org/wiki/Cleve_Backster
Evidence of a Primary Perception In Plant Life (full e-book):
http://rebprotocol.net/clevebaxter/Evidence%20of%20a%20Primary%20Perception%20In%20Plant%20Life%2023pp.pdf
Plant perception:
https://en.wikipedia.org/wiki/Plant_perception_%28paranormal%29
https://psi-encyclopedia.spr.ac.uk/articles/cleve-backster