How to tell Split fibrecap from Fool's funnel
How they differ, how to recognize them and which is more dangerous — a mushroom comparison
Warning: Split fibrecap(Pseudosperma rimosum)
POISONOUS
Eating it causes poisoning. Do not pick it unless you have identified it with certainty.
Toxin: muscarine (high concentration — up to 0.2% of dry weight, 100-200 times more than in the fly agaric). Symptoms start 15-90 min after the meal (fast). The classic "muscarinic syndrome" (PSL — "perspiration, salivation, lacrimation"): profuse salivation, heavy sweating, watering eyes, runny nose, constricted pupils (miosis), bronchospasm, bradycardia, low blood pressure, intestinal cramps, diarrhea, nausea, vomiting. Lasts 4-12 hours. In severe cases — collapse, pulmonary edema, risk of cardiac arrest. The antidote is atropine, which blocks muscarine at the muscarinic receptors. Treated only in a hospital — self-treatment with atropine is dangerous. If you suspect poisoning, call 112 or your local emergency number immediately and keep the mushroom leftovers and vomit. The prognosis is good with timely treatment.
If you suspect poisoning, call an ambulance immediately: 112 (the European emergency number) or your local emergency number
Warning: Fool's funnel(Clitocybe rivulosa)
POISONOUS
Eating it causes poisoning. Do not pick it unless you have identified it with certainty.
Toxin: muscarine in high concentration. Symptoms begin 15-60 minutes after eating (fast). The classic muscarinic syndrome (PSL): profuse salivation (liters of it), heavy sweating that soaks through clothing, tearing, runny nose, constricted pupils (miosis), bronchospasm with a feeling of suffocation, bradycardia down to 30-40 bpm, a drop in blood pressure, intestinal cramps, diarrhea, nausea. In severe cases — collapse, pulmonary edema, risk of cardiac arrest. The antidote is atropine, given in hospital under ECG monitoring. If you suspect poisoning, call 112 or your local emergency number immediately. Keep the mushroom remains and any vomit. The prognosis is favorable with prompt treatment (1-2 hours).
If you suspect poisoning, call an ambulance immediately: 112 (the European emergency number) or your local emergency number
The short answer
Split fibrecap and Fool's funnel look alike, so they're easy to mix up — but Split fibrecap is poisonous, while Fool's funnel is poisonous. The main visible difference: cap color: Split fibrecap — yellow, orange, brown, Fool's funnel — white, cream, pink. The mushrooms also differ in the following features: cap shape, cap surface, smell. If you have even the slightest doubt, leave the mushroom be.
Split fibrecap
Pseudosperma rimosum
Fool's funnel
Clitocybe rivulosa
📊 Comparing characteristics
⚠ Highlighted rows are the key differences between the edible and the dangerous mushroom
| Characteristic | Split fibrecap | Fool's funnel |
|---|---|---|
| Edibility class | Split fibrecap Poisonous | Fool's funnel Poisonous |
| Season | Split fibrecap SummerAutumn | Fool's funnel SummerAutumn |
| Use | Split fibrecap Not eaten | Fool's funnel Not eaten |
| Size | Split fibrecap Small (up to 5 cm) | Fool's funnel Small (up to 5 cm) |
| ⚠ Cap color | Split fibrecap YellowOrangeBrown | Fool's funnel WhiteCreamPink |
| ⚠ Cap shape | Split fibrecap Conical | Fool's funnel Flat |
| ⚠ Cap surface | Split fibrecap Cracked | Fool's funnel Smooth |
| Taste | Split fibrecap Mild | Fool's funnel Mild |
| ⚠ Smell | Split fibrecap Chemical | Fool's funnel Floury |
| Flesh color change | Split fibrecap No change | Fool's funnel No change |
| Hymenophore | Split fibrecap Gilled | Fool's funnel Gilled |
| Stem | Split fibrecap Central | Fool's funnel Central |
| Ring (veil) | Split fibrecap No ring | Fool's funnel No ring |
| Volva | Split fibrecap No volva | Fool's funnel No volva |
| Substrate | Split fibrecap Soil | Fool's funnel Soil |
| ⚠ Nutrition type | Split fibrecap Mycorrhizal | Fool's funnel Saprotroph |
| ⚠ Partner trees | Split fibrecap OakBeechHornbeamBirchHazel | Fool's funnel — |
📅 Seasonality
Split fibrecap
Fruiting season
June – October
Fool's funnel
Fruiting season
August – November
🔬 Morphology
Cap
Split fibrecap
Cap 2-7 cm across; in young mushrooms conical or bell-shaped with a pointed knob, later it opens out, but the knob stays. Color yellowish-ochre, straw-yellow, light brown in old mushrooms. The surface has a distinctive radially fibrous pattern, and when mature — deep radial cracks from the center to the edge (hence the species name rimosum — "cracked"). The margin is often split and upturned.
Fool's funnel
The cap is 2-5 cm across, convex in young mushrooms, becoming flat and spread out or slightly funnel-shaped with a thin wavy margin. The color is whitish to cream, with characteristic pinkish-cream concentric zones or streaks from the center to the margin — a diagnostic feature. The surface is silky-matte; in wet weather the skin is somewhat sticky.
Hymenophore
Split fibrecap
Gilled hymenophore. Gills fairly crowded, notched where they meet the stem. In young mushrooms they are whitish-gray, turning olive-brown or tobacco-colored with age. Spore print tobacco-brown or tobacco-colored — typical of the whole genus Inocybe.
Fool's funnel
Gilled hymenophore. The gills are crowded and thin, decurrent down the stem (a feature typical of the genus Clitocybe). Whitish to pale pink. The spore print is white.
Stem
Split fibrecap
Stem 3-8 cm tall, 0.4-1 cm thick, cylindrical, even or slightly thickened toward the base. Whitish to yellowish, paler at the top. Surface lengthwise fibrous, no ring. Flesh of the stem firm, hollow in old mushrooms.
Fool's funnel
The stem is 2-5 cm tall, 0.4-0.8 cm thick, slender, cylindrical, often curved. Whitish to cream, with white mycelial fuzz at the base. The surface is smooth, with no ring.
Flesh
Split fibrecap
Flesh thin, whitish to yellowish, does not change color when cut.
Fool's funnel
The flesh is thin, white, watery and brittle. It does not change color when cut. A faint, sweetish smell and mild taste — dangerously "normal".
Smell
Split fibrecap
Distinctly spermatic or stale and musty — typical of the whole genus Inocybe. This is an important diagnostic sign: if an unknown brownish mushroom has this unpleasant smell, throw it away without hesitation. Some sources describe the smell as "stale flour". The taste is mild or slightly bitter — do NOT rely on taste.
Fool's funnel
Faint, sweetish and not distinctive. Nothing alarming. The taste is mild. Neither smell nor taste gives away that it is poisonous.
📍 Habitats
Split fibrecap
Fool's funnel
👀 Similar mushrooms — don't mix them up!
❓ Frequently asked questions
Can Split fibrecap and Fool's funnel be mixed up?
How to tell Split fibrecap from Fool's funnel?
Which is more dangerous — Split fibrecap or Fool's funnel?
Is Fool's funnel edible?
When do Split fibrecap and Fool's funnel grow?
Sources
- [1]Вікіпедія (українська)
- [2]Атлас грибів України, Зеров Д.К. (1979)
- [3]MycoBank Database
- [4]Index Fungorum
- [5]GBIF
- [6]iNaturalist Ukraine