Lars Hansen (botanist)

Lars (Laß) Hansen (born September 12, 1788 in Dollerupholz , Duchy of Schleswig , † August 14, 1876 in Ausacker , Schleswig-Holstein province ) was a Schleswig-Holstein German teacher and botanist.

Life

Lars Hansen was a son of the farmer Jürgen Hansen (born September 29, 1757 in Dollerupholz; † August 21, 1831 ibid) and his wife Elisabeth (Elsabe) Christina, née Lassen Petersen (born May 14, 1760 Dollerup ; † September 25, 1808 in Dollerupholz). The paternal grandfather was named Jürgen Hansen, the maternal grandfather was the farmer Las Petersen.

From 1808 Hansen attended a teachers' seminar in Tondern, gave private lessons in the house of the director Johann Ludolph Forchhammer and observed the flora. The time at the seminary ended on Easter 1811 “with the first character in the absence of a better one”. He then worked as a teacher in Grünholz , from 1814 as a teacher and organist in Treia and in 1822 as a teacher, organist and sexton in Husby . After the dismissal as a German-minded person after the defeat of the Schleswig-Holsteiners in the Schleswig-Holstein uprising in 1850, he fled to his friend Marcus Schlichting in Kiel, with whom he lived. In 1851 he was allowed to return to Schleswig and moved to Lutzhöft , then in 1854 to his father-in-law Jensen in Maasbüll . In 1860 he went with this to Ausacker . In 1865 he taught again in Husby, the following year he retired and moved back to Ausacker.

Work as a botanist

His colleagues asked Hansen to make local poisonous plants available for class and to create a collection of the plants around Husby. This is how he met Ernst Ferdinand Nolte from Kiel . From 1825 to 1853 he sent Nolte an overview of the plants he had collected almost every year. Nolte wanted to use the total of 23 lists for the “Flora of Schleswig-Holstein” he was planning. Hansen therefore published a herbarium of the Schleswig-Holstein flora edited by Nolte . It was a collection with around 900 exsiccates , which was published between 1833 and 1862 and comprised 26 booklets. It was a type herbarium that was created according to the Carl von Linnés system. Since Hansen did not note the locations, it is only suitable for comparison purposes.

The collector Gottfried Renatus Häcker , his son-in-law P. Paulsen and the Dane Christian Theodor Vaupell also participated in Hansen's herbarium . Nolte checked all the booklets and was probably responsible for the few errors they contained. The publication of the planned 27th issue failed because Nolte did not complete the revision. During this time, Hansen and Nolte became enemies. The reason for this was that Hansen had informed the Danish judiciary Christian Marinus Paulsen (1818–1885) about the location of rare plants, which he passed on to the botanist Johan Martin Christian Lange .

From 1847 to 1857 Hansen published the collection " Pan of the Duchies of Schleswig-Holstein-Lauenburg ... " in the form of three centuries. This herbarium comprised 100 native grasses and semi-grasses from 26 genera. In 1852 a forage plant herbarium was added, in 1857 a herbarium with 110 species of freshwater algae was added. In the 1850s he also published a school herbarium that contained 439 species in four volumes, and in 1875 a list of the vascular plants that grew on Sylt.

Hansen was considered to be the person who probably knew best about the flora of Schleswig-Holstein at the time and was regarded as a botanist nationwide. He was in contact with the botanist Ferdinand von Mueller , who named an Australian plant species as Dodonaea hansenii in his honor .

Volunteering

Hansen co-founded the General Schleswig-Holstein Teachers' Association and was awarded the Dannebrogden in 1841 for his services to the school system . In the following year, the Schleswig-Holstein Patriotic Society gave him books because of his commitment to strengthening German sentiments. In 1842 he founded the singing society "Felicitas", which he led himself and which he made famous and which, for example, took part in the great singing festival in Schleswig in 1844.

family

Hansen married on October 20, 1814 in Treia Anna Röh (born November 10, 1794 in Holm in the parish of Treia; † February 3, 1841 in Husby ). The couple had four sons and three daughters. The son August Hansen (1825–1879) worked as a senior teacher in Kiel. The daughter Christina Margaretha "Sophie" Hansen (born August 28, 1822 in Treia) married the politician Peter Jensen .

literature

• Fritz Treichel: Hansen, Lars . in: Schleswig-Holstein biographical lexicon . Volume 5. Wachholtz, Neumünster 1979. ISBN 3-529-02645-X , pages 107-109.

Individual evidence

1. ↑ ^{a b c} Fritz Treichel: Hansen, Lars . in: Schleswig-Holstein biographical lexicon . Volume 5. Wachholtz, Neumünster 1979. ISBN 3-529-02645-X , page 107.
2. ↑ ^{a b c d e} Fritz Treichel: Hansen, Lars . in: Schleswig-Holstein biographical lexicon . Volume 5. Wachholtz, Neumünster 1979. ISBN 3-529-02645-X , page 108.