Boletus pulverulentus
Black Blue Ender Boletus (Boletus pulverulentus )
The black blue end Boletus (Boletus pulverulentus, syn. Xerocomus pulverulentus ) is a species of fungus in the family Dickröhrlingsverwandten. Previously, he was counted among the Filzröhrlingen. It is a rather small but quite joyful colored fungus within the boletus. It is characterized by the intense blue-black discoloration on pressure or on average.
- 7.1 Literature
- 7.2 Notes and references
Features
Macroscopic characteristics
However, the hat is cushion -shaped, at the age verflachend something. It has a width of 4-10 times 15 cm. Usually the cap is chestnut brown to red-brown or ocher-brown. More rarely it is lighter colored olive green. The surface is feinfilzig. If dry, it is finely cracked, something slimy in wet weather. Over time, the Hutfilz reduced, but not completely. The hat skin is on the edge sometimes slightly above and is often glued with dry leaves and grasses. The tubes are pale to lemon yellow, olive yellow later. Under pressure they turn intensely blue. The pores are colored similarly, a little livelier. Rarely they may be tinged with a little rust. In case of contact, the pores turn black blue.
The handle is formed of up to 10 cm long and rather thin. At the base it gradually tapers. In the upper part, the coloring is bright yellow in the lower part orange to reddish brown. The surface is covered with fine flakes that disappear quickly. The Basalmyzel is light, almost white tinted.
The meat has a lemon-yellow color, on average, it turns immediately black blue. This coloration fades largely only after half an hour. After an even longer time and nibbled the flesh is reddish brown while cooking it is dark brown. It smells pleasant and weak. Its flavor is mild.
Microscopic characteristics
The basidia measure 30-35 x 8-11 microns. The spores are spindle- shaped and 11-16 × 4.5-6 to breitelliptisch microns in size. The cystidia have a fusiform shape, being rather weak bulbous, sometimes clavate. In the end they taper to most. The Zystiden measure 40-60 x 7-12 microns. The Hutdeckschicht consists of 3-6 microns thick hyphae. The end cells are cylindrical to slightly clavate shaped and usually encrusted brownish.
Artabgrenzung
Due to its rather slender habit of the Black Blue end Röhrling could be initially mistaken for a Filzröhrling. However, these show a much weaker blue staining. Similarly, a strong blue witches boletes have usually red pores and a stockier build.
Ecology
The black blue end Röhrling preferably neutral to acid soil, beech forests, but also in other habitats it is found. The fungus is quite bodenvag, but it grows almost exclusively on acidic soils. He has a penchant for fresh soils and avoid the other hand, moist to wet, but also to dry areas. The black blue end Röhrling can enter into a mycorrhiza with various deciduous and coniferous trees. This mainly spruce and beech trees. The fruit bodies grow individually or in groups, but also from several tufted partly overgrown copies. They appear from late May to late autumn, but more frequently in summer and early autumn.
Dissemination
The black blue end Röhrling is found in Europe and parts of North America. In Germany he is more likely to be found scattered on suitable soils it comes locally also common. To the north, the distribution density decreases.
System
A very rare occurrence, rosahütige form has been described as Boletus pulverulentus var mougeotii ( Quélet ) Bon.
Importance
The mushroom is poisonous raw, cooked, however, a good, slightly sour -tasting mixed mushroom.