Botanist; born at Odessa May 5, 1845; died, July 24, 1903. He held the honorary professorship of botany at the University of Heidelberg, Germany. In 1871 he wrote "Beiträge zur Kritik der Darwinischen Theorie." A considerable number of his articles have been published in the "Botanische Zeitung," the "Botanischer Jahresbericht," and in the "Bibliothèque de l'Université de Génève," , ,