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Christian Erasmus Otterstrøm (Otterström) Jensen (1859–1941) was a Danish pharmacist and botanist, for decades a leading bryologist in Scandinavia. He studied botany and pharmaceutics at the University of Copenhagen and the Pharmaceutical College in Copenhagen. For the better part of his adult life, he ran a pharmacy in Hvalsø, Denmark, while devoting all available time to the study of mosses.

Selected works

• Jensen, C. (1885) Mosser fra Novaia Zemlia, samlede paa Dijmphna Expeditionen 1882–83 af Th. Holm. In: Dijmphna-Togtets zoologiske-botaniske udbytte. Copenhagen.
• Jensen, C. (1915–1923) Danmarks Mosser – Eller beskrivelse af de i Danmark med Færøerne fundne bryofyter. Copenhagen, Gyldendalske Boghandel/Nordisk Forlag.
  • 1. Hepaticales, Anthocerotales og Sphagnales, 317 pp.
  • 2. Andreæales og Bryales, 569 pp.
• Jensen, C. (1909) Musci asiae borealis: Beschreibung der von schwedischen Expeditionen nach Sibirien in den Jahren 1875 und 1876 gesammelten Moose mit Berücksichtigung aller früheren bryologischen Angaben für das russische Nord-Asien. Dritter Teil: Torfmoose. Kungliga Svenska Vetenskapsakademiens Handlingar, Vol. 44, No. 5.
• Jensen, C. (1939) Skandinaviens Bladmosflora. Copenhagen.

Sources

Paulsen, Ove (1941) Til Minde om Bryologen C. Jensen. Naturens Verden 1941.

1. International Plant Names Index.  C.E.O.Jensen.

• 19th-century Danish botanists
• Danish bryologists
• 1941 deaths
• 1859 births
• People from Lejre Municipality
• 20th-century Danish botanists