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Deadly webcap (Cortinarius rubellus)

Deadly webcap

Toxic

Cortinarius rubellus

Also known as: Cortinarius speciosissimus, Fool's Webcap

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Description

A highly dangerous, lethal mushroom characterized by its rusty-brown coloration and the presence of a cortina in young specimens.

How to Identify

Cap
3-8 cm diameter, convex to conical, often with a distinct central umbo, surface dry and fibrillose.
Gills
Adnate to adnexed, distant, broad, rusty-brown when mature due to spore deposition.
Stem
4-10 cm long, 0.5-1.5 cm thick, cylindrical or slightly tapering, yellowish with paler horizontal bands (remnants of the partial veil).
Flesh
Yellowish to orange-brown, thin, with no distinctive taste.
Fruiting body
Medium-sized agaric with a characteristic rusty-red to orange-brown appearance.
Habitat
Exclusively associated with coniferous trees, particularly spruce, in damp, mossy habitats.

Key Facts

  • Cap surfaces: Dry, fibrillose, slightly scaly.
  • Growth Form: Solitary to gregarious.
  • Spore Print: Rusty brown.
  • Body color: Orange-brown to reddish-brown.
  • Odor: Mild, nondescript.
  • Flesh bruises: Does not change color significantly.
  • Height: 4-10 cm.
  • Cap Diameter: 3-8 cm.
  • Nutrient gathering: Mycorrhizal symbiont.

Toxic

Deadly

Contains orellanine, a potent nephrotoxin that causes delayed kidney failure. Symptoms may appear 2 to 20 days after ingestion.

Toxin Type: OrellanineReaction Type: Nephrotoxic (Kidney failure)

Quick Check

  • Odor: Mild, slightly earthy or radish-like.
  • Fruiting: August to October.
  • Substrate: Ground/Soil associated with mycorrhizal conifers.

Where to Find

Northern Europe

Widely distributed in coniferous forests, particularly in Scandinavia and the British Isles.

North America

Present in specific northern cool-temperate coniferous ecosystems.

Finding Tips

Do not consume

This species is lethal. Never attempt to identify for consumption purposes.

Ecological niche

Look for damp, Sphagnum-rich areas under spruce trees in late summer to autumn.

Similar Species

Poison Firecoral

Podostroma

Also known as: Podostroma cornu-damae

Deadly dapperling

Lepiota

Also known as: Lepiota brunneoincarnata

Scientific Classification

Phylum
Basidiomycota
Class
Agaricomycetes
Order
Agaricales
Family
Cortinariaceae
Genus
Cortinarius

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