Carl Hansen Ostenfeld

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Carl Emil Hansen Ostenfeld (né Carl Emil Ostenfeld-Hansen) (August 3, 1873 - January 16, 1931) was a Danish systematic botanist. He graduated from the University of Copenhagen under professor Eugenius Warming. He was a keeper at the Botanical Museum 1900-1918, when he became professor of botany at the Royal Veterinary and Agricultural College. In 1923, by the early retirement of Raunkiær's, Ostenfeldt became professor of botany at the University of Copenhagen and director of the Copenhagen Botanical Garden, both positions held until his dead in 1931^[1]. He was a member of the Royal Danish Academy of Sciences and Letters and served on the board of directors of the Carlsberg Foundation.

Ostenfeldt is known as an explorer of the Danish flora, including marine plankton, as well as the flora of Western Australia^[2].

Ostenfeld participated in the International Phytogeographic Excursion to the British Isles in 1911. The party studied the flora of parts of Ireland, including Killarney, Connemara and The Burren.

About a dozen plant species^[4] and C.H. Ostenfeld Land in East Central Greenland is named after him.

[edit] Selected scientific works

• Ostenfeld, C.H. & Johannes Schmidt (1901) Plankton fra det Røde Hav og Adenbugten. Videnskabelige meddelelser fra Dansk Naturhistorisk Forening 1901: 141-182.

• Gelert, O. & Ostenfeld, C.H. (1902) Flora Arctica - containing description of the flowering plants and ferns, found in the Arctic regions, with their distribution in these countries, illustrated by numerous figures in the text.
  • Part 1. Pteridophyta, Gymnospermae and Monocotyledones. Copenhagen, 1902.

• Ostenfeld, C.H. (1908) On the immigration of Biddulphia sinensis Grev. and its occurrence in the North Sea during 1903-1907 and on its use for the study of the direction and rate of flow of the currents. Meddelelser fra Kommissionen for Danmarks Fiskeri- og Havundersøgelser: Serie Plankton 1 (6): 1-44.

• Ostenfeld, C.H. & Ove Paulsen (1910-1911) Marine plankton from the East-Greenland Sea (W. of 6° W. Long, and N. of 73° 30’ N. Lat.): collected by the "Danmark-Expedition" 1906-1908. Meddelelser om Grønland bd. 43 (11).
  • I : List of diatoms and flagellates / by C.H. Ostenfeld. 1910
  • II : Protozoa / by C.H. Ostenfeld. 1910
  • III : Peridiniales / by Ove Paulsen. 1910
  • IV : General remarks on the microplankton / by C.H. Ostenfeld and Ove Paulsen. 1911
• Ostenfeld, C. E. H. 1912. Some remarks on the International Phytogeographic Excursion in the British Isles. New Phytologist, 11: 114-127.
• Ostenfeld, C. H. (1912) Experiments on the Origin of Species in the Genus Hieracium (Apogamy and Hybridism). New Phytologist 11 (9): 347-354.

• Ostenfeld, C. H. (1915) Plants collected during the First Thule Expedition to the Northernmost Greenland. Meddelelser om Grønland, 51 (10)
• Ostenfeld, C. H. (1915) Ruppia anomala sp. nov., an Aberrant Type of the Potamogetonaceae. Bulletin of the Torrey Botanical Club 42 (12): 659-662.

• Ostenfeld, C. E. H. (1916) Contributions to West Australian Botany, part I: Introduction, The sea-grasses of West Australia. Dansk Botanisk Arkiv, 2(6): 1-44.

• Ostenfeld, C. E. H. (1918a) Contributions to West Australian Botany, part II: Stray notes from the tropical West Australia. Dansk Botanisk Arkiv, 2(8) : 1-29.

• Ostenfeld, C. E. H. (1918b) Contributions to West Australian Botany, part II: A revision of the West Australian species of Triglochin, Crassula (Tillaea) and Frankenia. Dansk Botanisk Arkiv, 2(8) : 30-55.

• Ostenfeld, C. E. H. (1921) Contributions to West Australian Botany, part III : Additions and notes to the flora of extra-tropical W. Australia. Biologiske Meddelelser, Kongelige Danske Videnskabernes Selskab, 3(2): 1-144.

• Ostenfeld, C. H. (1923) Critical Notes on the Taxonomy and Nomenclature of Some Flowering Plants from Northern Greenland (II Thule Expedition 1916-1918). Meddelelser om Grønland, 64.

• Ostenfeld, C. H. (1923) Flowering Plants and Ferns from Wolstenholme Sound (ca. 76°30' N. Lat.) and Two Plant Lists from Inglefield Gulf and Inglefield Land (77°28' and 79°10' N. Lat.) (II Thule Expedition 1916-1918). Meddelelser om Grønland, 64: 189-206

• Ostenfeld, C. H. (1924) The Vegetation of the North-Coast of Greenland. Based upon the late Dr. Th. Wulff's collections and observations (II Thule Expedition 1916-1918). Meddelelser om Grønland, 64: 221-268.
• Ostenfeld, C.H. (1925) Vegetation of North Greenland. Botanical Gazette 80 (2): 213-218.
• Ostenfeld, C. H. (1925) Some Remarks on Species and Chromosomes. American Naturalist 59 (662): 217-218.

• Ostenfeld, C.H. (1926) The flora of Greenland and its origin. Biologiske Meddelelser, Kongelige Danske Videnskabernes Selskab, 6, 1-71.

• Ostenfeld, C.H. (1931) The distribution within Denmark of the higher plants Results of the topographic-botanical investigation. 1: A brief historical survey of the investigation. Det Kongelige Danske Videnskabernes Selskabs Skrifter, Naturvidenskabelig og Mathematisk Afd., 9. Række, 3(1).

• Ostenfeld, C.H. & Johannes Grøntved (1934) The Flora of Iceland and the Færoes. Copenhagen, 1934.

[edit] Sources