Observation 158908: Tricholoma (Fr.) Staude

One of the observations on display at the 2014 All California Club Foray. Observations from 24 January are not necessarily from location anywhere near Albion; they may have been collected on the way here.
Joe Cohen

Species Lists



Proposed Names

55% (1)
Recognized by sight: too many questions to pin a firm ID on only a photograph. yes, it’s viscid, no, it doesn’t have reddening gills (they look brownish to my eye), no, there is no live oak in the area (so NOT dryophila, which was a ? name anyway).
Used references: “Tricholomas of North America,” Bessette, Bessette, Roody and Trudell. Fourth author Trudell wrote in his inscription in my copy: “Use it quickly before the sequences make the names wrong!”
28% (2)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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like I said…it is a confusion.
By: Debbie Viess (amanitarita)
2014-01-31 06:37:15 ACDT (+1030)

and again, how odd to make a remote photo ID with so much confidence, when there are so many other Trich species that look very similar.

Which indisputable features that you can clearly see here make it what you say it is?

Here is another quote from the recent Tricholomas of NA book re: viscid capped, brownish trichs:
“This whole group is in desperate need of critical study, including molecular analyses and comparison of North American material, before we can have a hope of assigning names confidently.”

This is
By: Noah Siegel (Noah)
2014-01-30 17:31:47 ACDT (+1030)

Tricholoma nictitans sensu Shanks. I think it gets lumped into Tricholoma transmutans in Bessette, Roody, Trudell, Bessette.

The west coast name for these appears to be Tricholoma subpessundatum; described by Murrill from OR.

It’s common with two-needle pines from Mendocino Co. north.

Deprecated as we speak.
By: Joseph D. Cohen (Joe Cohen)
2014-01-30 15:28:56 ACDT (+1030)

Looks like Walt Sturgeon deprecated Tricholoma nictitans as I was composing my previous comment.

= Tricholoma fulvum, T. pessundatum, T. flavobrunneum
By: Joseph D. Cohen (Joe Cohen)
2014-01-30 15:25:14 ACDT (+1030)

1. Seems like the current name for Tricholoma nictitans is Tricholoma fulvum, Index Fungorum Record 238438; MycoBank, which is also the preferred name for Tricholoma flavobrunneum.

2. Per the guidebooks, the feature which distinguishes this from similar Tricholoma species is some yellow in the gills and stem.1 2. Also note the comment:

“This whole group is sorely in need of critical study worldwide, as it seems there must be more names than there are taxa!”2

3. I don’t think these were on display on 24 January. This makes me think it’s unlikely that these were collected by Terry Henkel and his students on the way from Eureka to Albion.

1. Would you have a problem if I deprecated the MO Name T. nictitans in favor of T. fulvum?
2. Can you shed any more light on Debbie’s question?

— Joe

1 Arora, Mushrooms Demystified (Ten Speed Press 2d ed. 1986) (under Tricholoma pessundatum group)

2 Trudell & Ammirati, Mushrooms of the Pacific Northwest (Timber Press 2009) (under Tricholoma muricatum)

PNW trich?
By: Debbie Viess (amanitarita)
2014-01-30 13:57:12 ACDT (+1030)

Don’t know it. What are the important features?

Could have been collected by Terry and his students on the way down from Humboldt.

Created: 2014-01-30 08:12:06 ACDT (+1030)
Last modified: 2014-02-03 04:27:34 ACDT (+1030)
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