Johannes Ludwig Emil Robert von Hanstein was a German botanist who was a native of Potsdam.
He attended classes at the Gärtnerlehranstalt in Potsdam, and later studied sciences in Berlin, obtaining his doctorate in 1848. Wikipedia
Born: May 15, 1822, Potsdam, Germany
Died: August 27, 1880 (age 58 years), Bonn, Germany
Children: Otfrid von Hanstein and Ludwig Bertus
Parents: Christian Gottfried Ehrenberg
Partner: Helene von Hanstein