Sorrel webcap mushroom Toxic?

Updated 2026-03-06| 2 min read| 3,046 found this helpful
Cortinarius orellanus Fries; Cortinarius rubellus Cooke
1

Contains the nephrotoxic compound orellanin, with a long 2-14 day latency period before symptoms develop

2

Ingestion can cause irreversible kidney failure and death if left untreated, even in small doses

3

Early decontamination and supportive care significantly improve recovery outcomes for exposed individuals

FAQ

Is Sorrel webcap mushroom toxic to Humans?

Latency period of 2 to 14 days (shorter with higher ingested doses), followed by loss of appetite, gastrointestinal distress, extreme thirst, tingling sensations, reduced urine output, and kidney failure. Non-fatal cases typically see slow, gradual kidney recovery. (Severe)

Is Sorrel webcap mushroom toxic to Cats?

No specific clinical data available; suspected to cause identical kidney toxicity symptoms as observed in humans if ingested (Severe)

Is Sorrel webcap mushroom toxic to Dogs?

No specific clinical data available; suspected to cause identical kidney toxicity symptoms as observed in humans if ingested (Severe)

Is Sorrel webcap mushroom toxic to Horses?

No specific clinical data available; suspected to cause identical kidney toxicity symptoms as observed in humans if ingested (Severe)

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Toxicity Details

Humans
Severe

Latency period of 2 to 14 days (shorter with higher ingested doses), followed by loss of appetite, gastrointestinal distress, extreme thirst, tingling sensations, reduced urine output, and kidney failure. Non-fatal cases typically see slow, gradual kidney recovery.

Cats
Severe

No specific clinical data available; suspected to cause identical kidney toxicity symptoms as observed in humans if ingested

Dogs
Severe

No specific clinical data available; suspected to cause identical kidney toxicity symptoms as observed in humans if ingested

Horses
Severe

No specific clinical data available; suspected to cause identical kidney toxicity symptoms as observed in humans if ingested

Toxicity Snapshot

Toxic PartsEntire fruiting body (cap, stem, gills) is toxic
Exposure RouteIngestion (accidental consumption of misidentified wild foraged mushrooms)
Toxic CompoundsOrellanin

First Aid & Prevention

First 30 Minutes

  • • Induce vomiting only if ingestion occurred within 2 hours and the affected individual is fully conscious
  • • Administer activated charcoal to reduce gastrointestinal absorption of orellanin
  • • Collect any remaining mushroom samples for formal identification to guide treatment

Contact Vet Immediately

  • • Any confirmed or suspected ingestion of sorrel webcap, even if no symptoms are present
  • • Appearance of symptoms including extreme thirst, reduced urine output, or gastrointestinal upset after wild mushroom exposure
  • • Signs of lethargy, abdominal pain, or swelling of limbs indicating possible kidney dysfunction

Prevention

  • • Never consume wild foraged mushrooms unless verified by a certified, experienced mushroom identification expert
  • • Restrict access of pets and livestock to areas where wild Cortinarius species are known to grow
  • • Train foragers to recognize the rusty brown spore print and web-like cortina (partial veil) unique to Cortinarius mushrooms

Treatment & Prognosis

  • • Perform gastrointestinal decontamination as early as possible post-exposure
  • • Provide long-term fluid therapy and supportive care to preserve kidney function
  • • Monitor kidney function parameters continuously for several weeks post-exposure, even if symptoms resolve
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Professional Toxicology

Scientific NameCortinarius orellanus Fries; Cortinarius rubellus Cooke
AliasesOrangefuchsiger Rauhkopf、Orangefuchsiger Hautkopf、Orangefuchsiger Schleierling、Cortinaire des montagnes、Cortinario orellano、Cortinario cangiante
Toxicity Grade
HumansSevere
CatsSevere
DogsSevere
HorsesSevere
Target Organs
KidneysGastrointestinal tract
Mechanism of Action

• Orellanin accumulates in renal tubular epithelial cells, causing progressive cellular necrosis and loss of kidney filtration function over time

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

General livestock: No specific exposure data documented; all species are assumed to be at risk of severe kidney injury if they ingest sorrel webcap mushrooms
Confusion Risk

The following plants look similar and may be confused:

Brown-capped edible mushrooms Unspecified edible agaric species
Similar brown cap morphology to sorrel webcap; key differentiators are the rusty brown spore print and delicate web-like partial veil (cortina) present on immature Cortinarius specimens, which are absent in most common edible brown mushrooms.
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Related Toxic Plants

Deadly webcap
Cortinarius rubellus
Severe (Extremely toxic +++)
Fool's webcap
Cortinarius orellanus
Severe (Extremely toxic +++)
Splendid webcap
Cortinarius speciosissimus
Severe (Extremely toxic +++)

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Data Sources

This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.

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