 Daniel Siebert (ethnobotanist)

Daniel J. Siebert is an ethnobotanist, pharmacognosist, and author who lives in Southern California.Siebert has studied "Salvia divinorum" for over twenty years and was the first person to unequivocally identify (by human bioassays in 1993) Salvinorin A as the primary psychoactive substance of "Salvia divinorum".In 1998, Siebert appeared in the documentary Sacred Weeds shown in the United Kingdom.