Peyote is a certain type of hallucinogenic cactus that has been used by Native Americans for many hundreds of years and was popularized in the West by the writings of Carlos Castaneda. In GTA 5, players are able to collect and consume peyote specimens, which will temporarily grant them an animal form - much like the effects described by Castaneda. The plants are very small and can be difficult to spot, though they can be identified by their spherical shape and petaled flowers coming out of the top.