Psilocybe Subcubensis

Psilocybe subcubensis is an entheogenic species of mushroom in the Strophariaceae family. 

The magic mushroom contains the medicinal compounds psilocybin and psilocin. 
Psilocybe subcubensis was first described by Mexican mycologist Gaston Guzman. It is the pantropical sister species of Psilocybe cubensis. It is macroscopically identical to Psilocybe cubensis but has smaller spores.

Dr. Rick Strassman

Dr. Rick Strassman (born February 8, 1952 in Los Angeles, California, United States) is a medical doctor specialized in psychiatry with a fellowship in clinical psychopharmacology research. 

Rick Strassman MD performed the first new human studies with
psychedelic drugs in the US in over 20 years.

Rick Strassman was the first person in the United States after twenty years of intermission to embark on human research with psychedelic, hallucinogenic, or entheogenic substances. 
During the intermission period, research was restricted by law to animals studies only.