Boletus impolitus
Wan Boletus ( Hemileccinum impolitum )
The Fahle Boletus ( impolitum Hemileccinum, syn. Boletus impolitus ) is a rare, edible mushroom in the family of Dickröhrlingsverwandten ( Boletaceae ). It grows under oaks (Quercus ). Due to the occurring when cutting odor it is in English "iodine bolete " - called - German " iodine Röhrling ".
Features
Macroscopic characteristics
The hat is only hemispherical, but flattens with age and is depressed fully grown sometimes. He is pale brown, light tan or yellowish brown and often initially with a pale gray. The cap 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, the tube openings are small and round and not blue start. The tube sponge has grown 5-20 mm thick, bulged and easily removable. The spore powder is colored olive -like walnut brown. The stalk is 5-15 cm long and 2-5 cm wide with a bulbous at the base, slightly thickened form. The lower end is pointed and not rooted. He is ( pale ) yellow to yellow-brown and often has a more or less intense reddish approach. He does not have a handle power, but sometimes has reddish spots on. The flesh is pale yellow and reserves cut the same color. It is tender, taste mild to slightly sour and smells sour, iodine or karbolähnlich in the base.
Microscopic characteristics
The spores measure 10-16 × 5-6 micrometers.
Artabgrenzung
The Bitter Boletus radicans (Boletus radicans ) is very similar and can be found with oaks. He has a lighter hat, but his tubes change color blue in injury. It is not edible. The bitter and not edible Schönfuß Boletus (Boletus calopus ) has a clear and distinguishable network structure and is colored from red at the bottom of its stem.
Distribution, ecology and phenology
The species is widespread in Europe and is rare and worthy of protection. It prefers a mild climate and thus comes mainly in Southern Europe. They live in highly calcareous soils in deciduous forests and parks, in mycorrhizal association with oaks (Quercus ), hornbeam (Carpinus ) or beech ( Fagus sylvatica) and was found even among pines ( Pinus ). The fungus forms mainly from June to October and in Central Europe some already from the end of May to individually sociable standing fruiting bodies. In southern England it is only occasionally, only under the oak trees in front and bears fruit - depending on weather conditions - in two or three waves of June to September.
Systematics and Taxonomy
" Impolitus " is Latin and means " unpolished ", " matt", " unpolished " or " unfinished " and could be a reference to the hammered appearance of some specimens. The first scientific description is taken from the 1838 published work " epicrisis systematis mycologici " by Elias Magnus Fries, who then assigned the type of the genus Boletus (Boletus ). Recent studies revealed initially suspect that the species is attributable to the actual Filzröhrlingen ( Xerocomus ) to the goats lip ( Xerocomus subtomentosus ). Josef Sutara finally separated the Art 2008, together with the Gefleckthütigen Boletus (Boletus depilatus ) in the new genus Hemileccinum.
Importance
The Fahle Röhrling is edible and mild, but should be collected due to its rarity in the interest of conservation not for edible purposes.