Grey knight

Tricholoma terreum

Also called: Dirty tricholoma

In Spanish: Negrilla, Ratón, Fredolic, Morrico de corzo · In Catalan: Fredolic, Fredeluc, Negret, Brunet, Morro d'ovella, Gírgola d'estepa, Griset · In Basque: Ziza arre · In Galician: Ratiño, Pel de rato

Grey knight

Photo: User:Strobilomyces / Wikimedia Commons · CC BY-SA 3.0

Grey knight

Photo: This image was created by user Souhila Aouali at Mushroom Observer, a source for mycological images.You can contact this user here. / Wikimedia Commons · CC BY-SA 3.0

Grey knight

Photo: Adalbert Ricken / Wikimedia Commons · Public domain

Grey knight

Photo: Jan Kops / Wikimedia Commons · Public domain

Grey knight

Photo: Giacomo Bresadola / Wikimedia Commons · Public domain

Grey knight

Photo: James Sowerby / Wikimedia Commons · Public domain

Edible with cautionSeason Oct–FebSeason calendar →

A small tricholoma with a dry, mouse-grey, felted and scaly cap, white gills and brittle white flesh with no marked smell. The seasonal mushroom par excellence of Spanish pinewoods. In the 2010s compounds toxic to mice at high doses were found in it; the question is still open, so it is sensible not to eat it in quantity or regularly.

Quick facts

Scientific name
Tricholoma terreum (Schaeff.) P.Kumm. (1871)
Family
Tricholomataceae
Edibility
Edible with caution
Season
Oct–Feb
Usual altitude
236–1,422 m
Under which trees
Pine
Dangerous look-alike
Tiger tricholoma · Tricholoma pardinum
IUCN Red List
Not evaluated (NE)

Where it grows

Pinewoods on limestone, often beside paths and in thinly grassed clearings, in large troops. A late species — November to February.

Confused with

  • Tiger tricholomaTricholoma pardinumdangerous

    Larger, with dark flattened scales over the cap, thick flesh and a mealy smell. It causes severe poisoning.

When it has been found

Finds recorded in Spain, by month: 1,601 in all, from GBIF. They show when it fruits, and also when people go looking.

Jan: 119, Feb: 51, Mar: 49, Apr: 16, May: 20, Jun: 13, Jul: 12, Aug: 7, Sep: 87, Oct: 329, Nov: 488, Dec: 307

Where it has been found

Each square is an area of about 20 km with recorded finds; the darker, the more finds. It does not pinpoint patches: for where it is coming up now, see the forecast map.

Where it comes up

Areas where this species is scoring highest right now.

See it on the map

Sources

The usual altitude and the trees come from our own fit of the model to those finds and to the Spanish Forest Map (Mapa Forestal de España).

Would you know them from a photograph? →

The description is for reference. Identifying a mushroom from a photograph is unreliable: do not eat anything you are not sure of.