Pale bolete

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Pale bolete
Pallid boletus (Hemileccinum impolitum)

Pallid boletus ( Hemileccinum impolitum )

Systematics
Order : Boletales (Boletales)
Subordination : Boletineae
Family : Boletaceae (Boletaceae)
Subfamily : Xerocomoideae
Genre : Hemileccinum
Type : Pale bolete
Scientific name
Hemileccinum impolitum
( Fr. ) Šutara
Pale broth from Ukraine

The pale boletus ( Hemileccinum impolitum , syn .: Boletus impolitus ) is a rare, edible mushroom from the family of boletus relatives (Boletaceae). It grows under oak trees ( Quercus ). Because of the smell that arises when it is cut open, it is called “iodine bolete” in English.

features

Macroscopic features

The hat is hemispherical at first, but flattens out with age and is sometimes depressed when fully grown. It is pale brown, slightly light brown or yellow-brown, and often a pale gray initially. The hat diameter is usually between 5 and 12 cm, but can reach up to 20 cm. The tubes and tube openings are pale or lemon to golden yellow, whereby the tube openings are small and round and do not turn blue. The tubular sponge is 5–20 mm thick, bulged and easily removable. The spore powder is colored olive-like, walnut brown. The stem becomes 5–15 cm long and 2–5 cm wide with a bulbous shape that is slightly thickened at the base. The lower end is pointed and not rooted. It is (pale) yellow to yellow-brown and often has a more or less intense reddish tinge. It has no stem net, but sometimes has reddish spots. The flesh is pale yellow and remains the same color when cut open. It is tender, tastes mild to slightly sour and has a sour, iodine or carbolic smell in the base.

Microscopic features

The spores measure 10-16 x 5-6 micrometers.

Species delimitation

The rooting bitter boletus ( Boletus radicans ) is very similar and can also be found with oaks. He has a lighter hat, but his tubes turn blue when injured. It is not edible. The bitter and inedible boletus calopus ( Boletus calopus ) has a clearly recognizable network structure and is more red in color on the lower part of its stem.

Distribution, ecology and phenology

The species is widespread in Europe and is rare and worth protecting. It prefers a mild climate and is mainly found in southern Europe. It lives preferentially in calcareous soils in deciduous forests and parks, in mycorrhizal communities with oaks ( Quercus ), hornbeams ( Carpinus ) or red beeches ( Fagus sylvatica ) and has also been found among pines ( Pinus ). The fungus develops solitary to gregarious fruiting bodies mainly from June to October and in Central Europe sometimes from the end of May. In southern England it occurs only occasionally, only under oak trees and - depending on the weather conditions - fruit in two or three waves from June to September.

Systematics and taxonomy

" Impolitus " is Latin and means "unpolished", "matt", "unpolished" or "unfinished" and could represent a reference to the hammered appearance of some specimens. The first scientific description is taken from the 1838 released "epicrisis systematis mycologici" work of Elias Magnus Fries , of the kind of the kind of boletus ( Boletus zuordnete). Current investigations initially suggested that the species is attributable to the actual felt tubers ( Xerocomus ) around the goat lip ( Xerocomus subtomentosus ). Josef Šutara finally separated the species in 2008 together with the spotted boletus ( Boletus depilatus ) into the new genus Hemileccinum .

meaning

Dried fruit bodies

The pale boletus is edible and mild, but due to its rarity it should not be collected for food in the interests of species conservation.

swell

  1. ^ Josef Šutara: Xerocomus s. l. in the light of the present state of knowledge . In: Czech Mycology 60 (1) . Czech Scientific Society for Mycology, 2008, p. 29–62 (English, cuni.cz [PDF; 860 kB ]). PDF; 860 kB ( Memento of the original from July 12, 2014 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.  @1@ 2Template: Webachiv / IABot / web.natur.cuni.cz
  2. ^ A b Roger Phillips: Mushrooms . Pan MacMillan, 2006, ISBN 0-330-44237-6 .
  3. ↑ Helmut and Renate Grunert: Field Guide to MUSHROOMS of Britain and Europe (English Edition) . The Crowood Press Ltd, 1992, ISBN 1-85223-592-6 .
  4. ^ A b Hans E. Laux: The great cosmos mushroom guide. All edible mushrooms with their poisonous doppelgangers. Franckh-Kosmos, Stuttgart 2001, ISBN 3-440-08457-4 , p. 312.
  5. ^ Elias Magnus Fries: Epicrisis systematis mycologici . seu synopsis hymenomycetum. Typographia Academica, Upsala 1838, ISBN 81-211-0035-6 , pp. 421-422 (Latin, limited preview in Google Book Search).
  6. ↑ Boris Assyov: Boletus impolitus. In: boletales.com. Retrieved April 7, 2012 .

Web links

Commons : Hemileccinum impolitum ( Fr. ) Šutara  - Fahler Röhrling  - album with pictures, videos and audio files
 Wikispecies: Boletus impolitus Fr.  - Fahler Röhrling  - species directory