Phlegmacium caesiocolor
species of fungus
Phlegmacium caesiocolor is a species of mushroom-forming fungus in the family Cortinariaceae. First described in 2014 as Cortinarius caesiocolor, it was later reclassified in 2022 based on molecular data. The specific name caesiocolor refers to the distinctive bluish-violet to violet-brown colouration of its cap, which measures 5–9 cm in width. The mushroom features closely spaced gills that change from pale greyish-brown with bluish tints to pale brown as they mature, and a whitish stem with subtle bluish tints. Its flesh displays blue colouration throughout or in patches, particularly near the gills, and turns yellow when treated with potassium hydroxide solution. This fungus is found in southern Finland, where it grows in deciduous forests, along roadsides, and in parks, typically associated with oak, poplar, and hazel trees on calcareous soil.
Taxonomy
The fungus was originally described in 2014 by the mycologists Ilkka Kytövuori, Kare Liimatainen and Tuula Niskanen, who classified it as Cortinarius caesiocolor. The specific epithet refers to the bluish-violet colour of the cap. The holotype specimen was collected in Finland, in the Tamminiemi area of Jalassaari, Lohja, within the Uusimaa region. It was found on 27 August 2000, by I. Kytövuori (collection number 00-029) growing by a track on calcareous soil in a mixed deciduous forest containing birch (Betula), aspen (Populus tremula), oak (Quercus), hazel (Corylus), and goat willow (Salix caprea).
The public source identifies “Phlegmacium caesiocolor” as species of fungus. This brief keeps that definition visible, then builds a research path around Phlegmacium, caesiocolor and species.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Phlegmacium caesiocolor”, the useful work is to connect “species of fungus” to the records capable of establishing context and consequence.
Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Sep 30, 2025. The linked authority identifier is Q20036746. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2014, 2022 and 2000.
Scientific names, classifications and consensus can change while older terminology persists in catalogues and historical literature. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Check terminology, classification and the date of the cited evidence. Scientific names and technical consensus can change while older records retain historical value.
- Current terminology
- Classification context
- Finding cited technical literature
Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.
Three-step research path
- Establish the record: confirm the title “Phlegmacium caesiocolor”, its source revision and the description used here.
- Expand the search: follow Phlegmacium caesiocolor primary sources, Phlegmacium caesiocolor archive and Phlegmacium research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Phlegmacium caesiocolor”?
- Has classification or technical consensus changed since the cited source?
- Which observation, specimen, dataset or publication supports the account?
Search terms from this dossier
This entry incorporates text from “Phlegmacium caesiocolor” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.