In 1855, he published Écriture Anarienne, advancing the theory that the language spoken originally in Assyria was Turanian (related to Turkish and Mongolian), rather than Aryan or Semitic in origin, and that its speakers had invented the cuneiform writing system.
Irano-Turanian Region or Iran-Turan Plant Geography Region element, grows between 760–5600 m on rocky and drier slopes; distribution: Central to Western Asia, Turkey, Caucasia (Georgia), Iran, Afghanistan and Pakistan.