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August Heinrich Rudolf Grisebach (pronounced [ˈaʊɡʊst ˈhaɪnrɪç ˈʁuːdɔlf ˈɡriːzəbax]) was a German botanist and phytogeographer. He was born in Hannover on 17 April 1814 and died in Göttingen on 9 May 1879.