Karl Hermann Zahn

Karl Hermann tooth ( born December 3, 1865 in Baiertal; † February 8, 1940 in Haigerloch ) was a German botanist. His botanical author abbreviation is " tooth".

Life

Karl Hermann tooth came on 3 December 1865 as a child of the active at the Lower Mill in Baiertal Muller Master Konrad tooth and his wife Catherine Zahn, born Goos, to the world.

Tooth passed the matriculation examination for teachers and thereafter sub- teacher at the secondary school in Heidelberg. He studied at the Polytechnic School of Karlsruhe; thereafter he worked at the Realschule in Weinheim. Subsequently, he accepted an appointment at the Grand Ducal Baden Baugewerkeschule, later called Staatstechnikum (today Hochschule Karlsruhe - Technology and Economics ), where he remained in a nearly 40-year teaching career. Tooth in 1923 professor of descriptive geometry, chemistry and Building Materials.

In addition to this career already awakened in the 20 -year-old dental interest for botany. His first book Flora of Baar and the adjacent parts of the country appeared in 1889; the Baar is a plateau in southwestern Germany. Tooth became the best experts for the plant genus of hawkweed ( Hieracium ). With the also highly specialized in this genre colleagues Hans Schack Woldemar together, he published many works to hawk herbs. Tooth sighted the large Hieracium collections in Berlin, Innsbruck, Vienna, Budapest, Geneva, Zurich and Prague. He made the description of all the world's known species of the genus to his life's work.

Tooth completed in decades of work, the work of The Hieracia Central Europe by Carl Wilhelm von Naegeli and Gustav Albert Peter ( 1853-1937 ). For the plant The plant kingdom by Adolf Engler he wore 1921-1923 to folders 75, 76, 77, 79 and 82 each posts on hawkweeds at. Between 1922 and 1938, he wrote about hawkweeds in episodes 12 (1 ) to 12 ( 3 ) of the Synopsis of the Central European flora of Paul Friedrich August Ascherson and Karl Otto Robert Peter Paul Graebner. In 1923 he published his own great monograph of Hieracium.

Tooth married in 1894 Creszentia Zeiser from Haigerloch. After his retirement he lived in Haigerloch, where he died on 8 February 1940.