Tricholoma argyraceum

Yellowing Earth Knight (Tricholoma argyraceum )

The conditionally edible but inferior yellowing or silver gray earth Knight (Tricholoma argyraceum, syn. Tricholoma scalpturatum ) is a species of fungus in the family of Tricholoma relatives ( Tricholomataceae ). It is a silver-gray to gray- brown - hütiger, close-grained to imbricated Tricholoma, with mealy smell and gilbendem meat and fins. The fruiting bodies of mycorrhizal fungi from May to November, deciduous and coniferous forests as well as in parks and gardens.

• 6.1 Notes and references

Features

Macroscopic characteristics

The dry, dull hat is 3-8 cm wide. He is initially convex to conical, but soon flattens off and then carries in the middle of a more or less distinct blunt hump. The very thin, sharp edge is long time bent down and hung fine-fibred. At the age he is often torn and gelbfleckig. The surface is on light gray or graubräunlichem basic gray to dark gray radialfasrig or fine scales. The slightly beefier Hutmitte is colored darker. Since the fruit body yellowing, older specimens are colored pale yellowish - gray.

The almost forced standing, whitish fins are bulged grown on a stick and run with one tooth down on it. They are more or less intermingled and turn yellow in mature fruiting bodies in contact or after prolonged lying. The spore powder is white.

The stuffed up hohlfaserige and unsecured ringte stem is 3-8 cm long and 0.3-1.2 cm wide. He is white to gray - whitish and has a soft - silky to feinfasrige surface, the stem tip is fine flaky. Young stems are hung with volatile, fibrous Velumresten, later he turns yellow and clear especially touched points discolored yellow to ocher - grayish. The thin, fairly soft, yellowing flesh is white to gray - whitish colored. It smells slightly mealy and floury taste earthy and mild.

Microscopic characteristics

The inamyloiden, smooth and hyaline spores are elliptical and measure 5-7 × 3-4 microns.

Artabgrenzung

The yellowing earth Ritterlingsartige differs from the very similar Commons earth Tricholoma ( T. terreum ) mainly by the mealy - smelling and yellowing flesh, also affects the whole fruit body usually more delicate. The also very similar Ringed Erdritterling ( T. cingulatum ) differs by its distinct stem ring. Microscopically separate him his slightly smaller spores. All other features, such as smell and taste are largely consistent with the yellowing earth Tricholoma. Another similar and related species is the Spitzgebuckelte earth Tricholoma ( T. inocyboides ). It is the smallest mushroom from this group, strongly reminiscent of his spitzhütigen, hardly scaly hat on a crack fungus. He also smells like flour, but especially in older specimens of smell has also a very unpleasant component.

Also very similar is the Tiger Tricholoma ( T. pardinum ). It is larger and stockier and young fruiting bodies usually have a slightly bulbous bulbous stem. The silver-gray hat is scaled usually coarser and wet weather can be found on blades and the stem tip often water pearls. The Knight Ling also tastes mild and smells like the yellowing earth Ritterlingsartige Flour. The species is very rare in northern Germany, but comes in the limestone areas of central and southern Germany a little more common.

Some authors separate the here be summed up in a broad sense type T. argyraceum (sensu lato ) in the two ways: Tricholoma scalpturatum and ( T. argyraceum ) sensu stricto. T. S. S. argyraceum should have a fine silver white - fibered, not scaly hat and his overall slender. He is also to less obvious smell of flour and less yellowing.

Ecology

The yellowing earth Ritterlingsartige often grows in grassy beech and fir forests with and without interspersed spruce, as well as in corresponding oak-hornbeam and precious hardwood forests, but also in spruce forests. In Au and swamp forests, it occurs relatively infrequently. For this, you will very often find him at forest road edges, on clearings and in bushes, but also in parks and gardens. The fungus grows in shady places not to, on fresh, neutral to basic, as well as nutrient- saturated soils, usually on limestone, calcareous sands or marls.

The mycorrhizal fungus can enter into a partnership with various deciduous and coniferous trees. The most common co- trees are beeches, birches, pines, oaks and pines. The fruiting bodies appear in troops - up in droves, from May to November. The fungus grows both in the lowlands and in the mountains, in the Swiss Alps amount of Tricholoma rises up to 2650 m.

Dissemination

• Countries with records by
• Countries with no evidence
• No data
• Non-European countries

The yellowing earth Ritterlingsartige was detected in North America (USA, Canada), South America (Chile ), North Asia ( Siberia, Japan), North Africa (Morocco ), on the Canary Islands and in Europe. In the Holarctic its range is meridional boreal up. He is well spread throughout Europe. In the south it is found from Spain to Italy to Greece, Romania and Ukraine. It also occurs in the whole of Western Europe, in the UK it is spread northward up to the Hebrides. To the north can be found throughout Fennoscandia and Iceland. In Norway and Sweden, its range extends up to the 68th degree of latitude.

Importance

The yellowing earth Ritterlingsartige is basically edible, but it is so inferior that it can at best be used as a mixed mushroom. In many fungal leaders he is even referred to as inedible, not least because inexperienced mushroom pickers can very easily mistake the yellowing Erdritterling with the poisonous Tiger Tricholoma. Although the Tiger Tricholoma is not life-threatening, but can cause very unpleasant and tedious intestinal disorders.

Swell

• Paul Kirk: Tricholoma argyraceum. In: Species Fungorum. Accessed on 30 January 2014.
• Tricholoma argyraceum. In: MycoBank.org. International Mycological Association, accessed on 30 January 2014 ( English).