Clitocybe nebularis (Clouded Funnel)
Clitocybe nebularis (Clouded Funnel)
Table of Contents
- Introduction
- Identification Guide
- Taxonomy & Classification
- Edibility & Safety
- Look-Alikes & Confusions
- Habitat & Ecology
- Foraging Guide
- Cultivation
- Culinary Uses
- Preservation & Storage
- Medicinal Properties
- Seasonal Fruiting
- Spore Print & Microscopy
- Varieties & Forms
- History & Ethnomycology
- Beginner's Guide
- FAQ
🍄 Introduction
Clitocybe nebularis, the clouded funnel or clouded agaric, is a large, grey-capped funnel mushroom of deciduous and mixed woodland that fruits in late autumn, often in arcs or rings. It is listed as edible in older literature but is increasingly regarded as unreliable and problematic — it causes gastrointestinal illness in a significant proportion of consumers and may interact with medications. A powerful, distinctive grey-blue odour and waxy grey appearance make it recognisable, but several look-alikes complicate identification.
Caps are 8–20 cm across, initially convex to humped, expanding to broadly irregular with a wavy, inrolled margin, cloudy grey to grey-brown with lighter margins. Surface is smooth, dry to slightly moist, and matte. Gills are crowded, cream to pale yellowish, decurrent — running down the stipe. Stipe is 5–10 cm tall, 1.5–3 cm wide, stout, whitish to pale grey, solid, fibrous. Flesh is firm, white, with a strong, distinctive, slightly sweetish but slightly pungent odour that many describe as fruity or like over-ripe fruit.
Quick Facts
| Common Names | Clouded Funnel |
| Family | Tricholomataceae |
| Order | Agaricales |
| Origin | Europe, North America |
| Edibility | Suspect |
| Ecology | Saprobic |
| Spore Print | Pale Cream To Buff |
🔍 Identification Guide
Key features: large grey matte cap, crowded cream decurrent gills, stout grey-white stipe, and strong distinctive odour in deciduous leaf litter, autumn. Spore print is pale cream. Confirm decurrent gills and confirm that the cap is not whitish or bleached (which might indicate Clitocybe phyllophila or Ampulloclitocybe clavipes). The clouded grey colour and the powerful odour are confirmatory. Never confuse with Tricholoma saponaceum, which has a non-decurrent gill and soapy odour.
Morphological Features
| Feature | Description |
|---|---|
| Cap Shape | convex to broadly umbonate to wavy-irregular |
| Cap Diameter | 7-20 |
| Cap Color | pale grey to grey-brown, clouded |
| Cap Surface | smooth, dry, slightly frosted |
| Gill/Pore Type | gills |
| Gill/Pore Color | cream to pale yellow, crowded, decurrent |
| Stipe Height | 5-10 |
| Stipe Diameter | 1.5-3 |
| Stipe Features | pale grey, stout, solid, base often bulbous |
| Flesh Color | white to pale grey |
| Odor | strong, mealy to rancid |
| Taste | unpleasant, rancid |
| Spore Print | pale cream to buff |
Field Identification Checklist
- Cap shape: convex to broadly umbonate to wavy-irregular
- Cap color: pale grey to grey-brown, clouded
- Gill/pore type: gills
- Gill/pore color: cream to pale yellow, crowded, decurrent
- Spore print: pale cream to buff
- Odor: strong, mealy to rancid
- Stipe: pale grey, stout, solid, base often bulbous
Detailed Morphology
The decurrent gills and funnel shape develop as caps age; young specimens are less distinctly funnel-shaped than old ones. The grey cap colour fades to almost white in dry conditions or in very old specimens. The margin remains distinctly inrolled even in mature caps. The stipe base is often buried and may be connected to mycelial cords. The odour is one of the most distinctive in British mycology — easily recognised once known.
🧬 Taxonomy & Classification
The epithet nebularis means cloudy or foggy, describing the grey cap colour. Long placed in Clitocybe but molecular studies suggest it may warrant placement in a distinct genus; some mycologists use Infundibulicybe nebularis, though this is not universally accepted. Closely related to Clitocybe geotropa.
⚕️ Edibility & Safety
Officially edible in older literature but increasingly cautioned against. A proportion of consumers — estimates vary from 10–30% — experience significant gastrointestinal symptoms including nausea, vomiting, and diarrhoea even after thorough cooking. The fungus contains nebularine and other nitrogenous compounds, including a compound that may inhibit B12 absorption in some individuals. Current expert opinion in several European mycological societies recommends against eating it. Only experienced foragers who have eaten it before without reaction should consider it.
⚠️ Look-Alikes & Confusions
Ampulloclitocybe clavipes (club foot) — smaller, paler grey-brown, club-shaped stipe base, causes disulfiram-like reaction with alcohol. Clitocybe phyllophila — whitish, much paler, growing in leaf litter, highly toxic (muscarine). Clitocybe odora — blue-green, strong anise odour, edible but small. Tricholoma species — non-decurrent gills, different ecology. Lepista nuda (wood blewit) — purple-lilac gills and stipe, different odour. Entoloma sinuatum — sinuate (notched) gills, pink spore print, very toxic.
Known Look-Alikes
| Species | Edibility | Key Difference |
|---|---|---|
| Lepista nuda | Edible | Cap: violet-lilac fading to brown; Spore print: pale pink; Odor: strongly perfumed, floral; Habitat: woodland edges, compost heaps, gardens |
| Ampulloclitocybe clavipes | Unknown | Check all identifying features carefully |
| Entoloma sinuatum | Toxic | Cap: greyish-buff to yellowish-grey; Spore print: salmon-pink; Odor: mealy, unpleasant; Habitat: broadleaf woodland edges, parks, grassy clearings |
🌲 Habitat & Ecology
Grows in deciduous and mixed woodland, particularly in beech and oak woodland with deep leaf litter, often in large rings or arcs. A saprotroph of leaf litter and humus. Late autumn species, often fruiting into November and December when little else remains. The rings it produces in leaf litter can be substantial, with multiple arcs spanning metres across a woodland floor.
| Habitat | deciduous and coniferous woodland, often in rings |
| Substrate | leaf litter, humus |
| Ecology | Saprobic |
| Altitude | 0-1500 m |
| Climate Zones | temperate |
| Distribution | widespread Europe, North America |
Ecological Role
An important late-season saprotroph of leaf litter and humus in deciduous woodland, contributing to the breakdown of organic matter in the critical late-autumn period when fungal activity in most other species has ceased. Large fruiting bodies provide food for deer, slugs, and small mammals late in the year.
🗺 Distribution Map
Known distribution of Clouded Funnel: widespread Europe, North America. This species is saprotrophic (saprobic).
🧺 Foraging Guide
Collect only if you have personal experience tolerating the species, and only young, firm specimens. Cook thoroughly — eating raw is unacceptable. Given the uncertainty about individual sensitivity, this is not recommended for casual foragers or for sharing with people whose sensitivity is unknown. The stipes are edible but tougher than the caps.
🌱 Cultivation
Not cultivated. A litter saprotroph that does not fruit on simple substrate substitutes. Mycelium grows on agar but no reliable cultivation method exists.
| Difficulty | not cultivated |
| Substrate | not cultivated |
| Spawn Type | none |
🍳 Culinary Uses
For those who have eaten it without reaction: thorough cooking is essential. Young caps are best sliced and sautéed at high heat. The flavour is described as savoury and pleasant, though the strong odour diminishes on cooking. Avoid combining with alcohol given the risk of interaction from related compounds. Do not experiment on guests. The current consensus in UK and German mycological societies is to avoid this species.
📦 Preservation & Storage
Can be dried or frozen if you intend to eat it, but the safety caveats remain regardless of preservation method. Drying does not eliminate the problematic compounds.
🩹 Medicinal Properties
Contains nebularine, a purine nucleoside with documented antibacterial and antifungal properties in vitro. Early research investigated nebularine as a potential antibiotic but its human toxicity precluded clinical development. The compound is likely responsible for some of the gastrointestinal effects seen after consumption.
Known Properties
🍂 Seasonal Fruiting
A late-autumn specialist, appearing October through December in temperate Europe. One of the last woodland fungi of the year, sometimes found under snow. Peak fruiting in October–November in Britain.
🔬 Spore Print & Microscopy
Spores are cream in mass, ellipsoid, smooth, 5–8 × 3–4.5 µm, inamyloid. Basidia four-spored, clavate. No cystidia. Clamp connections present. The cream spore print helps exclude Tricholoma (white) and Entoloma (pink).
🌀 Varieties & Forms
No accepted varieties. A white form is occasionally encountered and has caused confusion with toxic white Clitocybe species.
📜 History & Ethnomycology
Used in parts of central and eastern Europe as an edible for centuries, particularly in areas where food shortages made the large fruiting bodies valuable. The species appears in nineteenth-century German and Czech foraging guides as edible without major qualification. The recognition of its problematic nature accumulated gradually through reported cases in the twentieth century.
🎓 Beginner's Guide
Beginners should not eat this species. It is an excellent identification exercise for learning funnel-forming Clitocybe species and understanding decurrent gill structure. Practice finding and recognising it purely for identification, not for eating. The odour is one of the most memorable in woodland mycology and will be unforgettable after the first encounter.
Photography Tips
The large grey caps photograph well in the flat, low-angled October light that prevails during its fruiting season. The ring structure in leaf litter is a striking compositional element. Wide-aperture shots isolating individual caps against a soft-focus leaf litter background emphasise the powdery grey surface texture. The stipe-cap junction with decurrent gills visible is an important identification shot to include.
Common Mistakes
LBMs (little brown mushrooms) include deadly species like Galerina marginata and Conocybe filaris
Both grow on wood in clusters; check for ring, spore print color, and substrate
Honey mushrooms cause GI distress when undercooked
Troubleshooting
If your collection shows some specimens with lilac-purple gill or stipe tones, suspect Lepista nuda nearby — they often grow in the same leaf litter. If the gills are notched (not decurrent), suspect Tricholoma or Entoloma rather than Clitocybe. If you experience gastrointestinal symptoms 1–4 hours after a meal containing these mushrooms, present the specimen to a poison control service for identification.
❓ Frequently Asked Questions
Can you eat Clouded Funnel?
Clitocybe nebularis is generally considered inedible due to poor taste, tough texture, or uncertain safety. It is not recommended for consumption.
What mushrooms look similar to Clouded Funnel?
Known look-alikes include Lepista nuda, Ampulloclitocybe clavipes, Entoloma sinuatum. Careful identification using multiple features (cap, gills/pores, stipe, spore print, habitat) is essential to avoid confusion.
Where does Clouded Funnel grow?
Clitocybe nebularis is found widespread Europe, North America. It typically grows in deciduous and coniferous woodland, often in rings during autumn.
What color is the spore print of Clouded Funnel?
The spore print of Clitocybe nebularis is pale cream to buff. Taking a spore print is an important step in mushroom identification.
Does Clouded Funnel have medicinal properties?
Clitocybe nebularis has been studied for potential nebularin antibiotic compound isolated properties. However, medicinal claims should be evaluated critically and discussed with a healthcare provider.
When is the best time to find Clouded Funnel?
Clitocybe nebularis typically fruits during autumn. Fruiting is often triggered by rainfall followed by appropriate temperatures for the species.
📋 Summary — Clitocybe nebularis (Clouded Funnel)
Clitocybe nebularis, the clouded funnel or clouded agaric, is a large, grey-capped funnel mushroom of deciduous and mixed woodland that fruits in late autumn, often in arcs or rings. It is listed as edible in older literature but is increasingly regarded as unreliable and problematic — it causes gastrointestinal illness in a significant proportion of consumers and may interact with medications. A powerful, distinctive grey-blue odour and waxy grey appearance make it recognisable, but several look-alikes complicate identification.
Related Species
Ampulloclitocybe clavipes — club foot, smaller, pale grey-brown, alcohol interaction. Clitocybe phyllophila — whitish, highly toxic. Lepista nuda — purple tones throughout, different odour. Entoloma sinuatum — notched gills, pink spore print.