Knud Jessen

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Knud Jessen

Knud Jessen (born November 29, 1884 in Frederiksberg , † April 14, 1971 in Lundtofte , greater Copenhagen area ) was a Danish botanist and Quaternary geologist. Its official botanical author abbreviation is " K.Jess. ".

Jessen was a state geologist with the Danish geological service from 1917. In 1920 he received his doctorate. In 1931 he succeeded Carl Emil Hansen Ostenfeld (1873-1931) as professor of botany at the University of Copenhagen and director of the Botanical Garden in Copenhagen.

Jessen dealt with pollen analysis and vegetation history of the Quaternary in Denmark and (through contact with Robert Lloyd Praeger) Ireland. He worked with his student Hagbard Jonassen .

In 1936 he became a knight of the Dannebrog Order . He was an honorary doctor of the Universities of Cambridge and Dublin and a member of the Royal Danish Academy of Sciences. He was on the Council of the Carlsberg Foundation.

He wrote a monograph on Nordic wild plants.

In 1962 he received the Albrecht Penck Medal .

Fonts

  • Moseundersøgelser in the north-eastern Sjælland. Med Bemærkninger om Træers and Buskes Indvandring and Vegetationens History. Danmarks Geologiske Undersøgelse, II.række, 34, 1920, 1-243 (his dissertation)
  • with Vilhelm Milthers : Stratigraphical and palaeontological studies of interglacial fresh-water deposits in Jutland and northwest Germany, Danmarks Geologiske Undersøgelser II rk., Volume 48, 1928, pp. 1–379.
  • with August Mentz: Vilde Planter i Norden, 1937 to 1940, 2nd (1949) and 3rd edition with Kai Gram 1957 to 1959
  • with H. Jonassen: The composition of the forests in northern Europe in Epipalaeolithic time. Biologiske Meddelelser, Kgl. danske Videnskabernes Selskab 12, 1935, pp. 1-64.
  • Studies in Late Quaternary deposits and flora-history of Ireland, Proceedings of the Royal Irish Academy 52, sect. B, no. 6, 1949, pp. 85-290.

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personal data
SURNAME Jessen, Knud
BRIEF DESCRIPTION Danish botanist and Quaternary geologist
DATE OF BIRTH November 29, 1884
PLACE OF BIRTH Frederiksberg
DATE OF DEATH April 14, 1971
Place of death Lundtofte