Boletus luridus
Netzstieliger witches Boletus (Boletus luridus )
The Netzstielige witches Boletus (Boletus luridus ) is a species of fungus in the family Dickröhrlingsverwandten. The species prefers calcareous soils and can form with many deciduous trees a mycorrhiza.
- 5.1 Literature
- 5.2 Notes and references
Features
Macroscopic characteristics
The 5-20 cm broad hat has a hemispherical to convex shape and a suede-like, velvety, dry surface. The hat color ranges from brown to ocher brick- reddish to dark; at the edges, it is often a bit lighter, dark blue on pressure points. The greenish to yellowish tubes run at pressure points quickly and intensively to dark blue. The round and small pores or openings on the tube Hutunterseite are colored crimson and blue also on pressure. The squat stem is 8-14 cm long and 1-3 cm wide. The stem has a yellowish color and is covered with a dark, veined network. The flesh is yellow, reddish at the stem base and above the tubes in red. It discolors quickly dark blue in the gate. For the blue discoloration Pulvinsäure derivatives are responsible as with most boletes. However, this does not affect the edibility. Smell and taste are not very pronounced in fresh specimens. The spore powder is olive brown.
Microscopic characteristics
The elongated spindle-shaped spores are 10-15 microns long and 5-7 microns wide.
Artabgrenzung
The Flockenstielige witches Boletus (Boletus erythropus ) shows the stem bark no net-like drawing but fine reddish flakes. A confusion would be harmless because the Flockenstielige witches Boletus Mushroom is considered better. Still looks like Boletus from mendax whose netted while dotted stem surface is reminiscent of a mixture of Flockenstieligem and Netzstieligem witches Boletus. In addition to outweigh the pileus and stipe reddish hues. Microscopically, the species is characterized by long spurs and a slightly different developed Hutdeckschicht. From ignorant collectors of Netzstielige witches Boletus can be confused with the poisonous, but even repulsive odor and much rarer Satan Boletus (Boletus satanas ). He has, however - especially when young - a much lighter gray hat color. Another doppelganger is the Caucasian witches Boletus, however we only rarely. A distinguishing feature is the yellow tube bottom which, however, can also occur sporadically in the Netzstieligen witches Boletus. Even clearer is the Iodfarbreaktion: She falls at Netzstieligen witches Boletus positive, the Caucasian is negative.
Ecology
The Netzstielige witches Boletus comes from early summer to autumn (June- October), often under deciduous trees ( oaks and poplars and elms ), in avenues and parks with mature trees and roadsides before. He is kalkhold to find because often rather dry, clay and alkaline soils.
Importance
The Netzstielige witches Boletus raw is toxic, well cooked normally edible. Chance occur at common consumption of alcohol intolerance, for which often the active ingredient Coprin is blamed. It is toxic in combination with alcohol. However, no Coprin or similarly acting substances could be detected in the fungus. Since this poison in the related oxen Boletus (B. torosus ) has already been found, the presumption arose that the poisoning may be due to confusion with this fungus. However, even the presence of this poison in the ox - Röhrling is doubted, since the fungus can be eaten without damage even with alcohol. In addition, symptoms and latency in appearance towards the Coprinus syndrome speak. Consequently, this form of poisoning from Netzstieligen witches Boletus and probably the ox - Röhrling is not caused.