Agaricus augustus
Giant mushroom (Agaricus augustus )
The giant mushroom (Agaricus augustus ), also giant Egerling, a fungus of the genus mushrooms or chestnut mushrooms is (Agaricus ).
- 5.1 Literature
- 5.2 External links
Features
Macroscopic characteristics
The fruiting bodies of the giant mushrooms are, as the name suggests, strikingly large. The first hemispherical domed hat flattens with increasing age and is then sometimes lightly pressed in the center. It can reach a diameter of 9-22 cm. The fruiting body often shows a genatterte surface because the velum tears when Aufschirmen of the hat. In the course of growth and this pattern breaks to continue so you sign off on the hat cracks. The hat is covered with ocher, walnut or dark brown, adjacent scales on a cream - white to ockerlichem underground. When rubbing the hat turns yellow clear. The edge is hung with long white to yellowish brown Velumresten and arched at the age upwards. The fairly closely spaced fins are young greyish- flesh-colored and stain aged over pink brownish chocolate brown. There are a pure white and a more ocher- colored form, but do not have a taxonomic rank. The cylindrical, 10-20 cm long and 1.5-3 cm thick stem is slightly thickened towards the base to clavate. The color is like the Hutuntergrund cream- whitish, turns yellow when touched the surface. The stem is occupied towards the base as on a hat with small, protruding and brownish scales. The ring is membranous, continuous and flocked down often yellowish. The whitish flesh runs on average to yellowish to rusty - brown and smells fine of bitter almonds.
Microscopic characteristics
The spores are elliptical, 7.5-10 microns long and 5-6.5 microns wide. The cheilocystidia are often arranged in short chains and multiform: pear - or belly - up bottle-shaped with constricted necks.
Ecology
The giant mushroom is a saprobiontischer bottom dwellers of the ( then usually under conifers ) grows mainly in the needle litter, rare in leaf litter in coniferous forests and coniferous forests, especially in old spruce forests, rare in deciduous forests. In deciduous forests, parks, gardens and similar habitats in which it occurs less frequently, it grows also preferred among conifers. It prefers slightly nitrogen-rich, alkaline to neutral, mostly loamy soils, frequently it occurs on acidic subsoil. Its fruit bodies appear in Central Europe from June to October, especially in the summer months.
Dissemination
The giant mushroom is a Holarctic widespread species that occurs in Asia ( Israel, Asia Minor, the Caucasus, Siberia and China), North America, North Africa, the Canary Islands and in Europe. In Europe, its range extends from the Mediterranean to the Hebrides and Denmark, Estonia and Belarus. In Germany the giant mushroom in Mittelgebirgsland is dispersed to southern Lower Saxony, in southern Bavaria and Baden- Württemberg frequently in northern and northeastern Germany rarer.
Importance
The giant mushroom is edible.