Initially, Unger studied law at the University of Graz. In 1820 he moved to Vienna to study medicine, in 1822 he enrolled at the Charles University in Prague. In 1823 Unger returned to Vienna and completed his medical studies in 1827.
From 1827 Unger practiced as a doctor in Stockerau near Vienna, then from 1830 as a court physician in Kitzbühel, Tyrol. In 1836 he was named professor of botany at the University of Graz and also taught at the Joanneum (which became the Universalmuseum Joanneum and the Graz University of Technology); in 1850 professor of plant physiology in Vienna. In 1852 he travelled to Northern Europe and to the Orient. Unger retired in 1866 and lived on his farm near Graz.
Unger is notable for proposing a theory of evolution before Charles Darwin.[1] Unger accepted the transmutation of species. During his time his ideas were widely criticized by those who held religious views.[2][3] In his book Attempt of a History of the Plant World (1852) he devoted a chapter to the evolution of plants.[4]
Works
Über den Einfluß des Bodens auf die Verteilung der Gewächse. 1836.
Über den Bau und das Wachstum des Dikotyledonenstamms. 1840.
Über Kristallbildungen in den Pflanzenzellen. 1840.
Grundzüge der Anatomie und Physiologie der Pflanzen. 1846.
Anatomie und Physiologie der Pflanzen. 1855.
Grundlinien der Anatomie und Physiologie der Pflanzen. 1866.
Synopsis plan tarum fossilium. 1845.
Chloris protogaea, Beiträge zur Flora der Vorwelt. 1841–1847.
Genera et species plantarum fossilium. 1850.
Iconographia plantarum fossilium. 1852.
Sylloge plantarum fossilium. 1860.
Die Urwelt in ihren verschiedenen Bildungsperioden. 1851, 3rd edition 1864. (With some of the earliest drawings of prehistoric animals.)
Versuch einer Geschichte der Pflanzenwelt. 1852.
Geologie der europäischen Waldbäume. 1870.
Wissenschaftliche Ergebnisse einer Reise in Griechenland und den Ionischen Inseln. 1862.
Die Insel Cypern. 1865.
Botanische Briefe. 1852.
Botanische Streifzüge auf dem Gebiet der Kulturgeschichte.
^Gliboff, Sander. (1998). Evolution, Revolution, and Reform in Vienna: Franz Unger's Ideas on Descent and Their Post-1848 Reception. Journal of the History of Biology 31: 179-209.
^Ruse, Michael; Travis, Joseph. (2009). Evolution: The First Four Billion Years. Belknap Press. p. 729. ISBN978-0674062214