Boletus pulverulentus
| Cyanoboletus pulverulentus | |
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| Scientific classification | |
| Kingdom: | Fungi |
| Division: | Basidiomycota |
| Class: | Agaricomycetes |
| Order: | Boletales |
| Family: | Boletaceae |
| Genus: | Cyanoboletus |
| Species: | C. pulverulentus |
| Binomial name | |
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Cyanoboletus pulverulentus (Opat.) Gelardi, Vizzini & Simonini (2014) |
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| Synonyms | |
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Cyanoboletus pulverulentus, commonly known as the ink stain bolete, is an edible bolete mushroom. It is found in deciduous and mixed forests, particularly on moist soil on slopes and under beech and oak trees. A common species, it is found in northern Asia, Europe, North Africa, Central and northern South America, and eastern North America. All parts of the mushroom will stain dark bluish-black after handling. The mushrooms are edible, but not particularly desirable.
Boletus pulverulentus was first described by German mycologist Wilhelm Opatowski in 1836. The specific epithet pulverulentus means "covered with powder" and refers to the somewhat dry powdery surface of the young cap and stalk. The fungus was transferred to the newly created genus Cyanoboletus in 2014, where it is the type species.
The cap is convex, flat when old, dark reddish-brown becoming lighter with age, and grows up to 8 cm (3.1 in) in diameter. The flesh is yellow, with a mild taste and immediately turns blackish-blue when handled. The spore print colour is olive brown, and the stalk is long and slender, bright yellow to orange yellow at the top, and reddish-brown at the base. The mushrooms are edible, but not particularly desirable.Spores are smooth, fusoid (fuse shaped) to elliptical, and measure 11–15 by 4–6 µm. The basidia (spore-bearing cells) measure 22–35 by 6–9 µm. The cap cuticle comprises a tissue layer of undifferentiated hyphae measuring 3–7 µm wide.
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Wikipedia