Observation 128694: Tricholoma squarrulosum Bres.
When: 2012-10-26
No herbarium specimen
0 Sequences

Proposed Names

14% (2)
Recognized by sight: Found on a foray with the XIX International conference on the fungal taxa and plant communities in the Mediterranean group in Avezzano, Abruzzo Region, Italy led by Loreto Guglietti of GEMA (Group Ecological Mycological Abruzzese).
Used references: Pierluigi Angeli identified this mushroom as T.terreum and gives a description on his website at this link http://www.photomazza.com/?Tricholoma-terreum
14% (4)
Recognized by sight: gill edges should be more blackish, maybe just atrosquamosum, it is very common in Italian deciduous forests in fall (look at my collections from Umbria – well not sure if I uploaded them already)
47% (2)
Eye3 Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
T. nigromarginatum
By: Gerhard Koller (Gerhard)
2013-04-30 15:57:24 EDT (-0400)

is the same as what I referred to. I found this in Italy too and there is no real difference except totally black gill edges (unlike here they are really black like in Pluteus atromarginatus). T. squarrulosum? No, it is too little flocculose and black. I would vote for simple T. atrosquamosum now which can be found abundantly in Umbria in late fall in deciduous forests unlike in Central Europe where it grows with pines, at least in my vicinity.

That’s what I thought too
By: Irene Andersson (irenea)
2013-04-30 15:11:11 EDT (-0400)

but these grey fibrous-scaly tricholomas are tricky. I don’t know if they can vary this much, or if there are additional species still without names..

I have found a similar one in coniferous habitat, will post it right now :-)

Oak & deciduous habitat fit T. squarrulosum
By: James Baker (cepecity)
2013-04-30 14:45:22 EDT (-0400)

Going with the oak & deciduous habitat, T. squarrulosum is the right fit. Looking at appearance, I don’t see the dark fibrils on the stipe in most T. squarrulosum descriptions, but there does seem to be more dark pigment around the center of the cap fitting with T. squarrulosum.

In the new Bessette et al book Tricholomas
By: Ron Pastorino (Ronpast)
2013-04-29 18:35:22 EDT (-0400)

of North America, there is a description of T. atrosquamosum(no photo).
They claim T.nigromarginatum is a synonym and “T. squarralosum is considered by many to be a variety of T. atrosquamosum, differing primarily by having more abundant squamules on the stalk. Others maintain them as separate species…”

Gerhard, Is there a published description for T. atrosquamosum var. nigromarginatum Bres.?
By: James Baker (cepecity)
2013-04-29 17:08:56 EDT (-0400)

Gerhard, Where did you find the name Tricholoma atrosquamosum var. nigromarginatum
published? I can only find the name T. nigromarginatum Bres. on Species Fungorum listed as a synonym under current name Tricholoma atrosquamosum Sacc., Syll. fung. (Abellini) 5: 104 (1887) var. atrosquamosum.

If the term nigromarginatum refers to darker edged gills which are barely noticeable on some gills of this mushroom, it would seem more applicable to a mushroom like T.squarrulosum such as http://mushroomobserver.org/129090?q=1DW9s

By: Irene Andersson (irenea)
2013-04-28 04:47:38 EDT (-0400)

A few details indicate that it’s not terreum: The habitat (no pine?), and the gill edges that are black spotted. Do you remember anything about the smell?

Not sure what T. triste is – different opinions about how to interprete the short description Scopoli made.. but Christensen & Noordeloos have chosen a neotype. It’s a tiny species, the cap 1-5 cm.

Your specimen looks big, too big for both terreum and triste.

Changed to Tricholoma terreum
By: James Baker (cepecity)
2013-02-20 18:03:11 EST (-0500)

Upon review,the Italian mycologist, Pierluigi Angeli, has changed the name for this mushroom to Tricholoma terreum which he describes on the following website-


Created: 2013-02-15 15:16:19 EST (-0500)
Last modified: 2013-04-30 23:16:30 EDT (-0400)
Viewed: 180 times, last viewed: 2017-08-16 23:10:50 EDT (-0400)
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