Boletus radicans
Root Santander Bitter Boletus (Boletus radicans )
The Bitter Boletus radicans or bitter sponge (Boletus radicans, syn. B. albidus ) is a species of fungus in the family Boletaceae.
- 5.1 Origin of the name
- 5.2 edibility
- 6.1 Literature
- 6.2 Notes and references
Features
Macroscopic characteristics
The hat has a diameter of 6-20, occasionally up to 30 cm. Old specimens have a dirty brownish yellow, young fruiting bodies, however, a pale gray - white color. First hemispherical bulges on the hat with age and eventually flattens out. The skin is not removable and is on the edge. He has a fine young felted surface verkahlt later. Bruises change color green blue, later pale from brownish. The tubes discolor already immediately schmutzigblau at slight touch. Untouched the tube mouths appear lemon yellow to golden yellow, olive aged well. The tube layer is 1-4 mm thick. The spore powder has an olive-brown color. The massive handle only shows a spherical shape and then extends to a bulbous, more club- like shape. He is 5-12 cm high and up to 7 cm thick. He's young, a pale yellow, later in a brownish - yellow over solid color. The stem bark is covered with a faint, yellowish - brownish network. The flesh is firm and later soft, white to light yellow and turns blue on the air immediately. It smells sour and tastes vary greatly bitter.
Microscopic characteristics
The spores measure 10-16 × 4-6 micrometers.
Artabgrenzung
The Bitter Boletus radicans similar to Schönfuß Boletus (Boletus calopus ), but has a significantly red-colored reticulated stem and grows on acidic soils and also in coniferous forests. Its meat tastes too bitter, but turns blue only weak. Further, there is similarity to the rare silver Boletus (B. fechtneri ).
Ecology
The Bitter Boletus radicans occurs in deciduous forests in Europe and requires lime-rich soils. He is a mycorrhizal fungus, which can be found especially in the company of book, but also in oak, birch, linden and hornbeam. It appears from July to September sometimes quite numerous. The stock of this heat-loving species increases as a result of climate change in Central Europe.
System
1801 radicans Bitter Boletus was first described by the South Africa -born mycologist Christian Hendrik Persoon.
Importance
Origin of the name
The Latin epithet " radicans " the two-part scientific name means " rooted " ( radix = root ). Later, the name synonymous " Boletus albidus " was added.
Feed value
The fungus is not recommended because of the sour smell and bitter taste for human consumption, although no toxic effects are opposed.