Gyroporus cyanescens | |
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Scientific classification | |
Kingdom: | Fungi |
Division: | Basidiomycota |
Class: | Agaricomycetes |
Order: | Boletales |
Family: | Gyroporaceae |
Genus: | Gyroporus |
Species: | G. cyanescens |
Binomial name | |
Gyroporus cyanescens (Bull.) Quél. (1886) |
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Synonyms | |
Boletus cyanescens Bull. (1788) |
Gyroporus cyanescens | |
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Mycological characteristics | |
pores on hymenium | |
cap is convex or flat |
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hymenium attachment is irregular or not applicable | |
stipe is bare | |
spore print is cream to yellow |
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ecology is mycorrhizal | |
edibility: edible |
Boletus cyanescens Bull. (1788)
Boletus constrictus Pers. (1801)
Leccinum constrictum (Pers.) Gray (1821)
Suillus cyanescens (Bull.) P.Karst. (1882)
Leucoconius cyanescens (Bull.) Beck (1923)
cap is convex
spore print is cream
Gyroporus cyanescens, commonly known as the bluing bolete or the cornflower bolete, is a species of bolete fungus in the family Gyroporaceae. First described from France in 1788, the species is found in Asia, Australia, Europe, and eastern North America, where it grows on the ground in coniferous and mixed forests.
The yellowish to buff cap surface is fibrous and roughened, and reaches up to 12 cm (4.7 in) in diameter. The thick stem, roughly the same color as the cap or lighter, is hollowed out into chambers. All parts of the mushroom turn an intense blue color within a few moments of bruising or cutting. The mushroom is edible, despite its hard stem. A less common variety occurs where the color change is to deep violet rather than blue. The bluing reaction results from the oxidation of a chemical called gyrocyanin.
The species was first described scientifically by French botanist Jean Baptiste François Pierre Bulliard in his 1788 Herbier de la France. Later synonyms include Boletus constrictus by Christian Hendrik Persoon in 1801,Leccinum constrictum by Samuel Frederick Gray in 1821,Suillus cyanescens by Petter Karsten in 1882, and Leucoconius cyanescens by Günther Beck von Mannagetta und Lerchenau in 1923. The variety violaceotinctus was described by Roy Watling in 1969 from collections made in Michigan, USA.