Girish Mahajan (Editor)

Cyanoboletus pulverulentus

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Kingdom
  
Fungi

Order
  
Genus
  
Higher classification
  
Division
  
Basidiomycota

Family
  
Scientific name
  
Boletus pulverulentus

Rank
  
Species

Cyanoboletus pulverulentus boletalescomwpcontentuploads201010Bpulveru

Similar
  
Caloboletus radicans, Suillellus queletii, Butyriboletus appendiculatus, Butyriboletus fechtneri, Hortiboletus rubellus

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.

Contents

Cyanoboletus pulverulentus Cyanoboletus pulverulentus Boletus pulverulentus 5 Photos

Taxonomy

Cyanoboletus pulverulentus Gobicecom

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.

Description

Cyanoboletus pulverulentus Cyanoboletus pulverulentus Boletus pulverulentus 5 Photos

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.

Similar species

Cyanoboletus pulverulentus Cyanoboletus pulverulentus Boletus pulverulentus 5 Photos

The eastern North American lookalike Boletus oliveisporus can be distinguished from C. pulverulentus by the pink to reddish colour in the center section of its stipe.

Habitat and distribution

Cyanoboletus pulverulentus Cyanoboletus pulverulentus Wikipedia

An ectomycorrhizal species, Cyanoboletus pulverulentus forms associations with coniferous and deciduous trees, particularly oak. Fruit bodies appear on the ground, usually singly, in woodland. The bolete is widely distributed, having been reported from northern Asia, Europe, North Africa, Central and northern South America, and eastern North America. Reports of appearances in western North American could refer to the similar Cyanoboletus rainsii, which stains greenish-black instead of bluish-black.

Cyanoboletus pulverulentus Hib modraka Wikiwand

References

Cyanoboletus pulverulentus Wikipedia