The Grey Knight

Poisonous Poisonous
Autumn Autumn
Summer Summer

A common member of the Knight family, this was once considered to be an edible mushroom but it has now been discovered that eating a certain weight of these mushrooms, even spread out over a fortnight, can cause kidney failure and is now deemed deadly poisonous.

Mushroom Type
Common Names The Grey Knight
Scientific Name Tricholoma terreum
Season Start Aug
Season End Oct
Average Mushroom height (CM) 6
Average Cap width (CM) 6
Please note that each and every mushroom you come across may vary in appearance to these photos.


Grey/white with small ‘woolly’ fibres radiating from the centre of the cap. Starts conical but will flatten out retaining an umbo.


White to pale grey, crowded and appear free from the stem but are narrowly joined and sinuate (notched near the stem.


Smooth and white.


White and usually hollow in the stem.


Mainly with Scotch Pines but can grow with other coniferous trees.

Possible Confusion

Other grey capped Tricholomas.

Spore Print

White. Ellipsoid.


Common and gregarious. 

Other Facts

This mushroom was once listed as edible but chemicals that can harm the kidneys have been found so it is now considered a deadly poisonous fungi.


2 comments for The Grey Knight

  1. Tomas Jahr says:

    Is it really true that its poisonus as this article says?

    Cause in norway they say its a good edible, and not dangerous. They dont mention poison at all

    1. Eric Biggane says:

      Chinese scientists have found toxins that cause irreparable damage to the kidneys as well as the fact that there are several look-a-like Tricholomas that you should not be consumed.

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