The Yajé is a plant that, it seems, is not yet classified. The most probable thing is that it is an apocinacea, according to Dr. Reinburg of Paris. It grows spontaneously in the regions of Putumayo and Caquetá to a height of 700 meters, and in climates of 28 degrees of temperature from now on. We must wait for the initiative classification on samples that have been sent abroad. Determined the elemental composition, and according to the molecular magnitude deduced from the platinum salt, this formula was obtained for the Yajein: C12H12N2O2