John-Axel Nannfeldt (baptized ''Johan Axel Frithiof Nannfeldt''), born 18 January 1904 in

Trelleborg Trelleborg () is a town in Skåne County, Sweden, with 43,359 inhabitants as of December 31, 2015. It is the southernmost town in Sweden located some west from the southernmost point of Sweden and the Scandinavian peninsula. It is one of the ...

and deceased 4 November 1985 in

Uppsala Uppsala (, or all ending in , ; archaically spelled ''Upsala'') is the county seat of Uppsala County and the fourth-largest city in Sweden, after Stockholm, Gothenburg, and Malmö. It had 177,074 inhabitants in 2019. Located north of the c ...

, was a

Swedish Swedish or ' may refer to: Anything from or related to Sweden, a country in Northern Europe. Or, specifically: * Swedish language, a North Germanic language spoken primarily in Sweden and Finland ** Swedish alphabet, the official alphabet used by ...

botanist and mycologist. Nannfeldt studied natural history at the

University of Uppsala Uppsala University ( sv, Uppsala universitet) is a public research university in Uppsala, Sweden. Founded in 1477, it is the oldest university in Sweden and the Nordic countries still in operation. The university rose to significance during ...

and obtained a

doctorate degree A doctorate (from Latin ''docere'', "to teach"), doctor's degree (from Latin ''doctor'', "teacher"), or doctoral degree is an academic degree awarded by universities and some other educational institutions, derived from the ancient formalism ''li ...

in 1932. He became professor of

botany 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 w ...

Uppsala University Uppsala University ( sv, Uppsala universitet) is a public research university in Uppsala, Sweden. Founded in 1477, it is the oldest university in Sweden and the Nordic countries still in operation. The university rose to significance during ...

in 1939, a position he held until his retirement in 1970. He did numerous studies on the systematics of

fungi A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from ...

and

vascular plants Vascular plants (), also called tracheophytes () or collectively Tracheophyta (), form a large group of land plants ( accepted known species) that have lignified tissues (the xylem) for conducting water and minerals throughout the plant. They ...

. Among the groups he treated were the plant pathogenic

rust fungi Rusts are plant diseases caused by pathogenic fungi of the order Pucciniales (previously known as Uredinales). An estimated 168 rust genera and approximately 7,000 species, more than half of which belong to the genus ''Puccinia'', are currently a ...

smut fungi The smuts are multicellular fungi characterized by their large numbers of teliospores. The smuts get their name from a Germanic word for dirt because of their dark, thick-walled, and dust-like teliospores. They are mostly Ustilaginomycetes (phylum ...

and ''

Exobasidium ''Exobasidium'' is a genus of fungi in the family Exobasidiaceae. The genus has a widespread distribution, especially in northern temperate regions, and contains about 50 species. Many of the species in this genus are plant pathogen Plan ...

''. He also treated

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. ...

and biogeography of various groups of vascular plants, e.g. the arctic '' Poa laxa''

complex Complex commonly refers to: * Complexity, the behaviour of a system whose components interact in multiple ways so possible interactions are difficult to describe ** Complex system, a system composed of many components which may interact with each ...

. Nannfeldt published the exsiccate work ''Fungi Exsiccati Suecici, praesertim Upsalienses'' together with Lennart Holm and others. He was elected member no. 983 of the Royal Swedish Academy of Sciences in 1955. The fungal

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...

''Nannfeldtiella'' was named in his honour by Franz Petrak in 1947, (now listed as a synonym of ''

Pseudombrophila aggregata ''Pseudombrophila'' is a genus of fungi in the family Pyronemataceae The Pyronemataceae are a family of fungi in the order Pezizales. It is the largest family of the Pezizales, encompassing 75 genera and approximately 500 species. Phylogenetic ...

'' .) then in 1960, mycologist Richard Korf circumscribed ''

Jafnea ''Jafnea'' is a genus of fungi in the family Pyronemataceae. It was circumscribed by mycologist Richard Korf in 1960. The genus name of ''Jafnea'' is in honour of Johan Axel Frithiof Nannfeldt (1904-1985), who was a Swedish botanist and mycologi ...

'', which is a

in the family

Pyronemataceae The Pyronemataceae are a family of fungi in the order Pezizales. It is the largest family of the Pezizales, encompassing 75 genera and approximately 500 species. Phylogenetic analyses does not support the prior classifications of this family, an ...

. The species of cup fungus, '' Plectania nannfeldtii'' was also named in 1968.

References

External links

Portraits, list of publications etc.
{{DEFAULTSORT:Nannfeldt, John Axel 1904 births 1985 deaths 20th-century Swedish botanists Swedish mycologists Uppsala University alumni Academic staff of Uppsala University Members of the Royal Swedish Academy of Sciences

See also

References

External links