Boletus queletii

Glattstieliger witches Boletus (Boletus queletii )

The Glattstielige witches Boletus (Boletus queletii ) is a rare fungal species from the family of Dickröhrlingsverwandten. Within the genus Boletus he belongs to the non-systematic group of witch - boletes.

• 4.1 hazard

Features

Macroscopic characteristics

The hat of the witch - Glattstieligen Röhrlings is hemispherical so to cushion -shaped; at the age he can also flatten a little or be depressed. The hat reached a diameter between 5-15, sometimes 20 cm. The color ranges from brownish - ruby to brick, copper or dark crimson. Close to the edge he possesses something lighter tones, which contain yellowish hues. Occasionally, this range can be spread over a large part of the hat. Old Fruit bodies have on the Hutoberseite often no more reds and have brownish tones. The surface is feinsamtig is aged but increasingly smooth ( glabrous ) and can be somewhat slimy in wet weather over a short period of time.

The tubes are initially lemon yellow, golden yellow and then finally with a pale Olivton. Under pressure they turn deep blue. The pores are tinted long as the tubes. Later they turn from the stalk starting orange-red to them at maturity usually have all this color. Also, they turn blue to pressure.

The stem is between 6-12, sometimes 15 cm long and 1.5-4 cm thick. He is young bulging shape, but is quite fast thick cylindrical to clavate from; often it is pointed something at the bottom. The stem is light yellow at the top and goes downward into a wine to garnet. The surface is not wetted, but can act finely powdered.

The meat ( Trama ) is tinted yellow and faded at the age of something; in the stem base is burgundy and yellow on the tube bottom. In violation of the yellow color turns abruptly in a bold blue; in the stem base, it turns reddish wine. Redness often covers the entire stem. After several hours the blue color faded to a washed-out yellow. The flavor of the meat is mild.

Microscopic characteristics

The spores are broadly fusiform - shaped with 9-15 × 4.5-7 microns to long - elliptical. The ratio of the length to the width ( Q value ) is about two and is thus especially small. The respective 4 spore -bearing basidia have a club-shaped form and measure 25-40 × 10-13 microns. The cystidia are 35-55 microns long and bulbous - shaped fusiform to almost blistered. Latter expression occurs mainly in the pores. You can be a bit yellowish, rarely slightly reddish at the pore. From Hutdeckschicht extend long, thin hyphae.

Variability

The Glattstielige witches Boletus is mainly in color quite variable. So for him several varieties and forms have been described. Commonly found are mainly var lateritius with brick brown hat and var rubicundus with crimson hat. Closely related is Boletus discolor, whose systematic position is not yet clear.

Artabgrenzung

The Glattstielige witches Boletus can be confused primarily with other witches - boletes, especially with the network and the Flockenstieligen witches Boletus. However, their stems are not smooth, but covered with a raised red, oblong- open mesh or fine red flakes.

Ecology and phenology

The Glattstielige witches Boletus preferred parks and similar habitats, but is also found in natural forests. First and foremost, you can find him in sedge beech forests; frequently it occurs in woodruff-beech forests and oak-hornbeam forests. The fungus grows on basic, dry to fresh soils with loamy or clayey most constituents. He is very heat -loving. The Glattstielige witches Boletus is a mycorrhizal fungus that lives exclusively with deciduous trees in symbiosis. Preferably, the copper beech; In addition, he can also be found under oaks. Apparently, the more frequent symbiotic partners within the forest areas beeches and oaks outside this.

The fruiting bodies are formed, especially in the warm summer months. In suitable weather conditions, they can occasionally occur until well into October.

Dissemination

The Glattstielige witches Boletus is meridionally distributed in the Holarctic to boreal. It can be found in North America in Vermont and North Africa in Morocco. In Europe, the deposits are located mainly in the south. To the north, the distribution extends approximately south of Sweden. To the east, the fungus can be found at least as far as the Caucasus. Presumably, the distribution is much broader in the Far East or even to China. In Germany, the fungus is mainly found in Baden- Württemberg and Saarland. North of the 50th degree of latitude are only isolated localities exist.

Endangering

The distribution of the Glattstieligen hexene Röhrlings decreases more and more, because he has a preference for basic background in warm deciduous forests. Habitats of this type are mainly due to increased coniferous forest reforestation and pollution increasingly in decline. Since the fungus can occur in parks, but the threat is not as strong as for example in the King Boletus (B. regius ) or the silver Boletus (B. fechtneri ) that are still picky in their ecological requirements. Nevertheless, the Glattstielige witches Boletus is performed in Germany as RL 2.

Importance

The mushroom is poisonous raw and can only be eaten when it is well cooked. However, he should be spared because of its rarity.

Swell

• Andreas Gminder, Armin Kaiser, German Josef Krieglsteiner, Wulfard winter Hoff: Mushroom Fungi: bars, clubs, coral and stubble mushrooms, abdominal mushrooms, Röhrlings and Täublingsartige. In: GJ Krieglsteiner (eds. ): The Great Mushrooms of Baden-Württemberg. Volume 2, Eugen Ulmer, Stuttgart 2000, ISBN 978-3-8001-3531-8.