Johan Erhard Areschoug

{{Short description|Swedish botanist (1811–1887)}}

File:Johan Areschoug x Hildegard Norberg.jpg

Johan Erhard Areschoug (Johannes Erhard Areschoug, Philos. Doctor, Botanices et Oeconomiae) (16 September 1811 – 7 May 1887) was a Swedish botanist who was a native of Gothenburg. He was a member of the Arreskow family (in Swedish). His first name is sometimes recorded as "John".

He studied natural sciences at the University of Lund, where in 1838 he earned his doctorate in philosophy. In 1859 he succeeded Elias Magnus Fries (1794-1878) as professor of botany at the University of Uppsala, a position he maintained until 1876. In 1851, he was elected a member of the Royal Swedish Academy of Sciences.

Areschoug performed extensive field studies of Scandinavian cryptogams, being remembered for his work in the field of phycology. Since 1836 he edited exsiccatae devoted to Scandinavian algae, the largest series with the title Algae Scandinavicae exsiccatae quas adjectis Characeis distribuit John Ehrh. Areschoug. Serie novae (1861-1879).Triebel, D. & Scholz, P. 2001–2025 IndExs – Index of Exsiccatae. – Botanische Staatssammlung München: http://indexs.botanischestaatssammlung.de. – München, Germany.{{cite web |title=Algae Scandinavicae exsiccatae quas adjectis Characeis distribuit John Ehrh. Areschoug. Serie novae: IndExs ExsiccataID=1515962623 |website=IndExs – Index of Exsiccatae |publisher=Botanische Staatssammlung München |url=https://www.botanischestaatssammlung.de/DatabaseClients/IndExs/Exsiccatae_IndExs_Details.jsp?ExsiccataID=1515962623 |access-date=30 March 2025}}

The red algae genus Areschougia from the family Areschougiaceae is named in his honor.{{cite book | last=Burkhardt | first=Lotte | title=Eine Enzyklopädie zu eponymischen Pflanzennamen |trans-title=Encyclopedia of eponymic plant names | publisher=Botanic Garden and Botanical Museum, Freie Universität Berlin | year=2022 | isbn=978-3-946292-41-8 | url=https://doi.org/10.3372/epolist2022|format=pdf |language=German |location=Berlin | doi=10.3372/epolist2022 | s2cid=246307410 |access-date=January 27, 2022}}