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Deadly Webcap

Deadly Webcap

Cortinarius rubellus

Photo: Danny Steven S.

Habitat

Woodland

This species grows in moist, cool coniferous and mixed forests, particularly on acidic or sandy soils. It is frequently found among mosses (including sphagnum), heather, and bilberry, often appearing near pine or spruce. It develops on the ground in duff or moss, but occasionally fruits on moss-covered decaying logs and stumps. It typically grows solo, in small groups, or in tufted clusters.

Photos

Appearance

Cap
2.5–8 cm across; initially conical or bell-shaped, maturing to convex or flat with a prominent central bump; surface is dry, finely velvety to scaly, and reddish-brown to orange-brown.
Stem
3–10 cm long and 1–1.8 cm thick; cylindrical to spindle-shaped, sometimes tapering to a point at the base; surface is fibrous, pale ocher to orange-brown, and may feature yellowish woolly patches or bands from the veil.
Gills
Fairly distant and well-spaced; attached to the stem with a notch; color progresses from yellowish-ochre to reddish-brown or rusty brown as spores mature.
Flesh
Yellowish-ochre to pale tan; thin in the cap and fibrous in the stem; may develop rusty stains with age.
Spore print
Rusty brown to reddish-brown.
Smell
Distinctly radish-like.

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Edibility

Not edible

This species is remarkably dangerous and potentially fatal due to the presence of orellanine, a toxin that causes kidney failure. Symptoms like vomiting, stomach pain, muscle aches, and headaches are slow to develop, appearing anywhere from 2 to 14 days after consumption. It can be confused with various similar-looking webcaps such as Cortinarius gentilis, C. kroegeri, C. infucatus, or C. limonius.

Misidentification can be fatal. Never eat a mushroom unless you're 100% sure. This information may be inaccurate. Always consult multiple sources.

Nutrient Source

Ectomycorrhizal

This mushroom forms a symbiotic relationship with trees, exchanging nutrients with their root systems.

Common Names

Danish
spidspuklet gift-slørhat, Puklet gift-slørhat
Dutch
fraaie gifgordijnzwam, Fraaie gifgordijnzwam
English
Deadly Webcap
Finnish
suippumyrkkyseitikki
French
Cortinaire roux
German
Spitzgebuckelter Rauhkopf
Norwegian Bokmål
spiss giftslørsopp
Norwegian Nynorsk
spiss giftslørsopp
Swedish
toppig spindelskivling, toppig giftspindelskivling, toppig giftspindling
Welsh
Cap Gweog Marwol

Synonyms

  • Cortinarius orellanoides
  • Cortinarius speciosissimusDeadly Webcap
  • Cortinarius speciosus
  • Dermocybe orellanoides
  • Telamonia rubella
  • Telamonia rubella