Russula olivacea

Rotstieliger leather Russula ( Russula olivacea )

The Rotstielige leather Täubling or alternating colored leather Russula ( Russula olivacea ) is a species of fungus in the family Täublingsverwandten. There is a very large, mild -tasting Täubling with brownish hat and yellow ocher blades. Very typical is the purple-violet discoloration of the meat with phenol, which is otherwise observed only at very closely related species.

• 6.1 Notes and references

Features

Macroscopic characteristics

The hat is 4-22 cm wide, he is young hemispherical, later convex to expanded, sometimes a little depressed in old age. The hat skin is slightly sticky in humid weather, dry velvety matte and smooth, it can be up to about 1/3 deducted. At the edge of hat they may be wrinkled concentrically especially in older mushrooms. The brim is curled in young mushrooms and irregular wavy to lobed in older. The hat color is highly variable in young mushrooms is usually somehow olive-brown, later usually outweigh wine reddish hues, but also yellow and pink flesh tones come before.

The lamellae are grown bulged and very wide. The slats are young still pale yellow and take the age an ever strong yellow hue to that can reach an intense yolk yellow. The sheaths in the peripheral area are often crowded wine-red to pink.

The strong stem is 8-15 cm long and 2-4 cm wide, cylindrical, hard young and firm, stuffed cottony aged, white and crowded at least in the upper part pink to burgundy. Sometimes the red color is also confined to a small area below the slats, sometimes the entire stalk is colored at the base, he is also frequently discolored yellowish to brownish.

The flesh is white, firm young, weak yellowing and discolored with phenol deep burgundy. The smell is unremarkable, slightly fruity. The taste of hard but brittle flesh is mild and slightly nutty aged also sticky. The spore powder is intense ocher- colored to yellow yolk.

Microscopic characteristics

The oval spores measure 8-11 × 9 microns and are up to 1.5 microns high, isolated warts occupied, which are not or only occasionally connected to each other via fine lines.

In the hat skin Pileozystiden missing. The hyphae have rectangular, barrel-shaped, ampoule-shaped or sometimes strongly inflated terminal cells.

Ecology

Like all russulas is the Rotstielige leather Täubling a mycorrhizal fungus. Especially in beech, rarely also in coniferous forests, often. In small groups, like on calcareous soil, but also on silicate soils

Dissemination

The species occurs in North America ( USA, Mexico), North Africa (Morocco ) and Europe.

Importance

Although the fungus is considered to be edible, but it has come in the past in some cases to adverse reaction.

System

The Rotstielige leather Täubling is Bon asked in the sub-section Olivaceinae that. Below the section Alutacea All members of this sub-section are relatively large, taste mild, have yellow to brown suede fins, yellow spore powder and varied colored hats. Very typical is the purple violet phenol reaction of the fruiting body. The scientific Artattribut " olivacea " means olive in color and is a reference to the often olive brown colored hat.

Swell

• Marcel Bon (ed.): Pareys book of mushrooms. Franckh - Kosmos Verlag, Stuttgart 2005, ISBN 3-440-09970-9, page 78
• Template: Internet resource / maintenance / access date is not in the ISO FormatH. Romagnesi: Russula olivacea. Les Russules d'Europe et d' Afrique du Nord (1967). In: The Fungal mycobank.org website. Accessed on 29 August 2011 ( French).
• Template: Internet resource / maintenance / access date is not in the ISO FormatRussula olivacea. Partial Russula Database. In: cbs.knaw.nl. CBS Fungual Biodiversity Centre, accessed on August 29, 2011.