Datura metel
The argument for an Indian origin for "Datura metel" advanced in Dr. Siklós's paper hinges on the identity of the plant "da dhu ra" and an unbroken continuity of nomenclature for said plant i.e. to establish his contention as fact, a researcher would have to prove a) that the plant first designated by the name "da dhu ra" was indeed "Datura metel" (this necessarily involving, at the very least, a rudimentary description of the plant's anatomy) and b) that the name had always been applied to that plant and that plant only i.e. that the name "da dhu ra" was not first applied to an unrelated plant and only later applied to "Datura metel" at a time compatible with its introduction from the Americas by Europeans. None of the five extracts translated by Siklós provide a description of "da dhu ra", although some mention its (eminently "Datura"-like) effect of causing insanity. Of the extracts, the third ('C') is the most relevant in this context: