Hallucinogenic Plants, A Golden Guide, written by Richard Evans Schulte. Published by Golden Press, New York, NY, this book "surveys the role of psychoactive plants in primitive and civilized societies from early times to the present.  

The first nontechnical guide to both the cultural significance and physiological effects of hallucinogens".  Measuring 4" by 6", it was originally intended to be a pocket guide.  Very hard to find and out of print. Good condition, minor wear on edges and corners.