Fool’s Funnel (Clitocybe rivulosa)

The Fool’s Funnel (Clitocybe rivulosa) is a deceptively harmless-looking mushroom commonly found in lawns, parks, meadows, and grassy areas throughout the UK. It often grows in fairy rings and has a pale white to cream cap that becomes shallowly funnel-shaped with age. The gills are white and run down the stem, giving it a neat, tidy appearance that can mislead inexperienced foragers.

This mushroom contains muscarine a toxin that affects the nervous system. Symptoms usually appear within a few hours of ingestion and include sweating, excessive salivation, vomiting, abdominal pain, blurred vision, and slowed heart rate. While poisoning is rarely fatal with medical treatment, it can be extremely unpleasant and dangerous, especially for children or vulnerable adults.

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Identification Features:

• Small to medium white to pale cream mushroom
• Cap starts convex, becoming flat or shallowly funnel-shaped
• Cap surface is smooth and matte, sometimes cracking in dry weather
• Cap margin often inrolled when young
• Gills are white, crowded and decurrent (running down the stem)
• Stem is short, white and fibrous
• No ring or volva present
• Flesh is thin and white
• Smell can be pleasant or slightly mushroomy - not a reliable ID feature
• Grows in grassland, lawns, parks, meadows and pasture
• Often appears in fairy rings, arcs or troops
• Fruits late summer through autumn in the UK
• Very easily mistaken for edible grassland mushrooms

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Foraging Safety:

• Highly poisonous - never eat
• Contains muscarine, a toxin that affects the nervous system
• Causes rapid onset of symptoms, often 15–60 minutes after ingestion
• Symptoms may include:
• Excessive sweating
• Salivation and tearing
• Nausea and vomiting
• Diarrhoea
• Abdominal cramps
• Slowed heart rate
• Can be fatal in severe cases, especially for children and vulnerable adults
• Frequently mistaken for:
• George’s mushroom
• field mushrooms
• Other small white grassland fungi
• Key danger points:
• Appears in lawns and park
• Clean, edible-looking appearance
• Never rely on:
• Colour alone
• Smell
• Location in grass
• Beginners should avoid all small white mushrooms in grass
• Cooking, drying or freezing does NOT make it safe
• Dangerous to children and pets
• If ingestion is suspected:
• Seek urgent medical attention immediately
• Inform medics of possible mushroom poisoning
• Best advice:
• Leave all suspected funnel mushrooms alone
• Photograph for learning, never collect

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