Clouded Funnel

The Clouded Funnel is one of the largest and most abundant late-season agarics of temperate woodland, forming conspicuous arcs, rings and long troops through deep leaf litter. The English name refers to the cloudy grey wash of the cap, which is often overlaid with a fine whitish bloom like the skin of a plum.

It belongs to Clitocybe, a genus historically defined by decurrent gills, a white to cream spore print and a funnel-shaped or flattened cap. Modern classifications have moved many species out of the genus, but C. nebularis remains a core member, distinguished from its smaller relatives by sheer size and by its thick, firm stipe.

The species is also notable for its strong, sweetish-mealy smell, sometimes likened to crushed grass or a stale, sweet perfume, which is often detectable at arm's length from a large troop and is a useful field character when combined with the pale bloomed cap.

Cap

The cap is large for the genus, typically 6-20 cm across, at first convex with a strongly inrolled margin, later flattening and eventually developing a shallow central depression. The surface is dry, smooth and dull grey to grey-brown, usually paler towards the margin, and covered when fresh with a fine white pruinose bloom that can be wiped off with a finger.

Gills

The gills are crowded and narrow, white at first, ageing to cream or pale buff. They are adnate to shortly decurrent, running a short way down the stipe apex, and are notably easy to detach from the cap flesh in a sheet, a small but useful character.

Stipe

The stipe is stout, 5-12 cm long and 2-4 cm thick, often thickening downwards to a clubbed base that is bound into the litter by white mycelial threads. It is pale grey to dirty whitish, longitudinally fibrous, firm when young but becoming spongy and hollow inside with age. There is no ring and no volva.

Flesh and spore print

The flesh is thick, firm and white, and does not change colour when cut. The smell is strong and sweetish-mealy. The spore print is white to pale cream, and a deposit is easy to obtain because the fruit bodies are large and long-lived.

The Clouded Funnel grows in deep leaf litter and needle duff in both broadleaf and conifer woodland, and also under hedgerows, in shelterbelts and in mature parkland. It shows a particular fondness for beech, oak and spruce litter and for rich, well-shaded ground where the litter layer is thick and slow to break down.

Fruiting is late, usually beginning well into autumn and continuing until the first sustained frosts. The species is widespread and common across Europe and temperate Asia and is recorded from North America. It characteristically forms large arcs, complete fairy rings or long serpentine troops of dozens of fruit bodies.

Clitocybe nebularis is a saprotroph, feeding on fallen leaves, needles and small woody debris rather than partnering with tree roots. Its mycelium binds the litter layer into a dense white mat that spreads outward year on year, which is why the fruit bodies appear along expanding arcs and rings.

The species also interacts with other fungi: its mycelium is known to suppress or displace neighbouring litter fungi, and the fruit bodies themselves are frequently parasitised by Volvariella surrecta, a small white mushroom with a sac-like volva that erupts directly from the decaying caps. Finding that parasite on a host is effectively a confirmation of the Clouded Funnel's identity.

The Giant Funnel, Leucopaxillus giganteus, reaches a similar or larger size and also grows in rings, but it is white to pale cream rather than cloudy grey, has a much more deeply funnelled cap at maturity, tougher flesh, and grows in open grassland rather than woodland litter. Clitocybe phyllophila and other white funnels are far smaller and chalk-white with a frosted surface, lacking the grey cap and thick clubbed stipe.

Entoloma sinuatum is a large pale grey-buff agaric of similar stature but has sinuate rather than decurrent gills that turn distinctly salmon-pink with age and a pink spore print. Lepista nuda shares the woodland litter habitat and stout build but is lilac to violet throughout when fresh and gives a pale pink spore deposit rather than a cream one.