Peter Nielsen (botanist)

Peter Nielsen (28 July 1829 – 30 September 1897) was a Danish botanist and plant pathologist.

[http://www.indexfungorum.org/Names/AuthorDetails.asp?ID=979 Index Fungorum Authors of Fungal Names]

He was born at a farm in Vonsbæk parish in the Duchy of Schleswig. He graduated in 1857 from Jelling Statsseminarium in Vejle. He was employed at Flakkebjerg Institute from 1857-1859. In 1859, he became a school teacher at Ørslev in Zealand, where he studied the local flora. He was particularly interested in plants useful to agriculture and in plant pathogens. He was a prolific writer on these topics. He undertook meticulous studies of rust fungi.{{cite web|url= https://runeberg.org/salmonsen/2/17/0979.html|title = Nielsen, Peter, dansk landøkonomisk Forsøgsleder |website= Salmonsens konversationsleksikon |access-date=January 1, 2020}}{{cite web

|url= http://denstoredanske.dk/Erhverv,_karriere_og_ledelse/P%C3%A6dagogik_og_uddannelse/P%C3%A6dagogiske_institutioner/Jelling_Statsseminarium

|title = Jelling Statsseminarium|website= Den Store Danske, Gyldendal |author= Tage Kampmann |access-date=January 1, 2020}}

“Peter Nielsen”, pp. 221-223 in {{cite journal | last= Warming | first = Eug. | authorlink = Eugenius Warming | year=1881 | title= Den danske botaniske Literatur fra de ældste Tider til 1880 | language=Danish |trans-title= Danish botanical literature from ancient times to 1880 | journal=Botanisk Tidsskrift | volume= 12 | pages =42–217 | url= https://archive.org/stream/dendanskebotanis00warm/dendanskebotanis00warm_djvu.txt}}

He was the first to describe the host alternation of Puccinia poarum between grasses and Tussilago farfara.{{cite journal| last= Nielsen |first= P. |year =1877 | title=Bemærkninger om nogle Rustarter, navnlig om en genetisk Forbindelse mellem Aecidium tussilaginis Pers. og Puccinia poarum n. sp. | language=Danish |trans-title= Notes on some rust species, in particular the genetic unity of Aecidium tussilaginis Pers. and Puccinia poarum n. sp. | journal = Botanisk Tidsskrift | volume= 10 | pages = 26–42 }}

He issued the exsiccata Exsiccatsamling af Characeer navnlig fra Danmark utgivne af P. Nielsen.{{cite web |title=Exsiccatsamling af Characeer navnlig fra Danmark utgivne af P. Nielsen: IndExs ExsiccataID=761701504 |website=IndExs – Index of Exsiccatae |publisher=Botanische Staatssammlung München |url=https://www.botanischestaatssammlung.de/DatabaseClients/IndExs/Exsiccatae_IndExs_Details.jsp?ExsiccataID=761701504 |access-date=26 August 2024}}

{{botanist|Nielsen|Peter Nielsen}}