Oak cobweb

Oak cobweb (Cortinarius nemorensis) Oak cobweb (Cortinarius nemorensis) Oak cobweb (Cortinarius nemorensis)

Oak cobweb (Cortinarius nemorensis)


  • Department: Basidiomycota (Basidiomycetes)
  • Subdivision: Agaricomycotina (Agaricomycetes)
  • Class: Agaricomycetes (Agaricomycetes)
  • Subclass: Agaricomycetidae
  • Order: Agaricales (Agaric or Lamellar)
  • Family: Cortinariaceae (Spiderwebs)
  • Genus: Cortinarius (Webcap)
  • Species: Cortinarius nemorensis (Oak cobweb)


  • Changing webcap

  • Phlegmacium largum;
  • Phlegmacium nemorense.

Oak cobweb (Cortinarius nemorensis)

Oak cobweb (Cortinarius nemorensis) is a mushroom belonging to the Spiderweb genus, the Cobweb family.

External description

Oak cobweb (Cortinarius nemorensis) belongs to the number of lamellar mushrooms, consisting of a leg and a cap. The surface of young fruiting bodies is covered with a cobweb blanket. The diameter of the cap of an adult mushroom is 5-13 cm, in young fruiting bodies its shape is hemispherical, gradually becoming convex. At high air humidity, the cap becomes wet and becomes covered with mucus. When dry, fibers are clearly visible on its surface. The surface of young fruit bodies is colored in light purple shades, gradually acquiring reddish-brown colors. A lilac tint is often noticeable along the edges of the cap.

The mushroom pulp is characterized by a whitish color, it can rarely have a purple tint, has a faint unpleasant odor, and is fresh to taste. Often, experienced mushroom pickers compare the smell of an oak cobweb to the scent of dust. Upon contact with alkalis, the pulp of the described species changes its color to bright yellow.

The length of the stem of the fungus is 6-12 cm, and its diameter varies within 1.2-1.5 cm. In its lower part, it expands, and its surface in young mushrooms has a light purple tint, and in mature fruit bodies it becomes brownish. The remains of the bedspread are sometimes visible on the surface.

The hymenophore of this fungus is lamellar, consists of small plates with indentations, fused with the stem. They are located relatively often to each other, and in young mushrooms they have a light gray-purple color. In mature mushrooms, this shade of the plates is lost, transforming into a brownish color. The spore powder consists of small particles 10.5-116-7 microns in size, the surface of which is covered with the smallest warts.

Season and habitat of the mushroom

Oak cobweb is widespread in the Eurasian zone and often grows in large groups, mainly in mixed or deciduous forests. It has the ability to form mycorrhiza with oaks and beeches. On the territory of Russia, it is found in the Moscow region, Primorsky and Krasnodar territories. According to research by mycologists, this type of mushroom is rare, but widespread.

Oak cobweb (Cortinarius nemorensis)


Various sources interpret information about the edibility of the oak cobweb in different ways. Some mycologists claim that this species is inedible, while others speak of this type of mushroom as a little-studied, but edible mushroom. With the help of research, it was precisely determined that the composition of the fruit bodies of the described species does not contain components toxic to the human body.

Similar types and differences from them

The cobweb belongs to the category of hard-to-distinguish fungi belonging to the Phlegmacium subgroup. The main similar species with him are:

Oak cobweb (Cortinarius nemorensis) Oak cobweb (Cortinarius nemorensis) Oak cobweb (Cortinarius nemorensis)

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Hunting, Fishing and Mushrooms: a magazine for hunters and fishers.
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