Ingebrigt Severin Hagen (1852- 8 June 1917) was a

Norwegian Norwegian, Norwayan, or Norsk may refer to: *Something of, from, or related to Norway, a country in northwestern Europe * Norwegians, both a nation and an ethnic group native to Norway * Demographics of Norway *The Norwegian language, including ...

physician A physician (American English), medical practitioner (Commonwealth English), medical doctor, or simply doctor, is a health professional who practices medicine, which is concerned with promoting, maintaining or restoring health through th ...

and

botanist Botany, also called , plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. The term "botany" comes from the Ancient Greek wo ...

who specialized in the

taxonomy Taxonomy is the practice and science of categorization or classification. A taxonomy (or taxonomical classification) is a scheme of classification, especially a hierarchical classification, in which things are organized into groups or types. ...

of the

bryophyte The Bryophyta s.l. are a proposed taxonomic division containing three groups of non-vascular land plants (embryophytes): the liverworts, hornworts and mosses. Bryophyta s.s. consists of the mosses only. They are characteristically limited in ...

s. Born in

Trondheim Trondheim ( , , ; sma, Tråante), historically Kaupangen, Nidaros and Trondhjem (), is a city and municipality in Trøndelag county, Norway. As of 2020, it had a population of 205,332, was the third most populous municipality in Norway, and ...

to shoemaker father Ingebrigt Hagen and Caroline Elizabeth née Helle, Hagen was academically gifted and graduated in arts from the Trondheim Cathedral School in 1870. He worked under Professor Worm Müller on physiological chemistry from around 1874–79 at

Oslo Oslo ( , , or ; sma, Oslove) is the capital and most populous city of Norway. It constitutes both a county and a municipality. The municipality of Oslo had a population of in 2022, while the city's greater urban area had a population of ...

. He then continued research in Uppsala, Sweden with Professor Holmgren in 1877 and then at Berlin, Leipzig and Dresden. He received a medical degree in 1883. He worked in Stören (1883–1884),

Frederikstad Frederikstad is a hamlet in South Africa some 34 km south-west of Carletonville Carletonville is a town in Gauteng and the seat of the Merafong City Local Municipality in the West Rand District Municipality in Gauteng, South Africa, just ...

, and during an epidemic in 1899, at Ilsviken. In 1897 he came a district legislator at Surendalen but quit work after a few months. He then moved to

Oppdal is a municipality in Trøndelag county, Norway. It is part of the Dovre region and the traditional district of Orkdalen. The administrative centre of the municipality is the village of Oppdal. Other villages in the municipality include Lønse ...

, attracted by the mossflora, in June 1899 to work as a district clerk. He travelled around Norway to examine the mosses and slowly became less interested in his medical practice. He sought 3000 NOK annually (later increased to 30,000 NOK) for his research from the Nansen Foundation and his request was supported by Victor Schiffner of Vienna. From 1906, the Nansen Foundation supported him in his bryological research and he worked on ''Forarbejder til en Norsk Lövmosflora'' from 1908 to 1915 dealing with twenty moss families. In June 1910, he married Magdalene Dietrichs Borgen, daughter of a priest known for her work as an illustrator at the Trondheim museum. Hagen publisher his major work as a series of books, he also published in journals and a series titled ''Musci Norvegiae Borealis'' (1899–1904).

References

External links

Norwegian Lexicon entry
1852 births 1917 deaths Scientists from Trondheim 19th-century Norwegian botanists 20th-century Norwegian botanists {{botanist-stub