Johannes von Hanstein, Date of Birth, Place of Birth, Date of Death
TweetJohannes von Hanstein
German botanist
Date of Birth: 
Place of Birth: Potsdam, Brandenburg, Germany
About Johannes von Hanstein
- Johannes Ludwig Emil Robert von Hanstein (15 May 1822 – 27 August 1880) was a German botanist who was a native of Potsdam. He attended classes at the Gärtnerlehranstalt (Institute of Horticulture) in Potsdam, and later studied sciences in Berlin, obtaining his doctorate in 1848.
- In 1855 he was a lecturer of botany at the University of Berlin, and six years later became curator of the royal herbarium.
- In 1865 he was appointed professor of botany at the University of Bonn and director of the botanical garden. Hanstein is remembered for studies in plant anatomy and morphology.
- In 1868 he introduced the "histogen theory" to explain shoot apex behaviour in plants.
- With his close friend, Nathanael Pringsheim (1823-1894), he conducted pioneer research on the fertilization process in ferns. The plant genus Hansteinia of the family Acanthaceae is named after him.
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