Theodor Karl Julius Herzog

Theodor Carl (Karl) Julius Herzog (7 July 1880, Freiburg im Breisgau – 6 May 1961, Jena) was a German bryologist and phytogeographer. This botanist is denoted by the author abbreviation Herz. when citing a botanical name.

He studied sciences in Freiburg and Zürich, obtaining his doctorate in 1903 from the University of Munich as a student of botanist Ludwig Radlkofer (1829-1927). Later on, he obtained his habilitation at Eidgenössische Technische Hochschule in Zürich under the sponsorship of Carl Joseph Schröter (1855-1939).

From 1904 to 1912, he was engaged in a series of botanical excursions; Sardinia (1904 and 1906), Ceylon (1905 and 1908) and Bolivia (1907-08 and 1910-12). In 1920 he became an associate professor of botany at the University of Munich, and later succeeded Wilhelm Detmer (1850-1930) at the University of Jena (1925), where he remained until 1948.

He was a leading authority of mosses, and also dealt with the systematics and phytogeography of flowering plants. As his career progressed, he focused more of his attention towards the classification of liverworts, in particular the family Lejeuneaceae.

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