German botanist and pharmacist (1805-1860).
Johann Friedrich Klotzsch (9 June 1805 – 5 November 1860) was a German pharmacist and botanist. His principal work was in the field of mycology, with the study and description of many species of mushroom. Klotzsch was born in Wittenberg. Originally trained as a pharmacist, he later enrolled in pharmaceutical and botanical studies in Berlin. In 1830–32 he was curator of William Jackson Hooker's herbarium at the University of Glasgow. In 1832 he edited and distributed the famous exsiccata Herbarium vivum mycologicum sistens fungorum per totam Germaniam crescentium collectionem perfectam. This se