Observation 87196: Tricholoma (Fr.) Staude
When: 2012-01-28
Who: Byrain
No herbarium specimen

Notes: Growing from the ground along the side of the trail with some white Russula sp. The trees nearby are all oak except for a few Pinus sabiniana and some shrubs.

Edit (1-30-12):

Spore range = 5 – 6 × 4 (5)
Average spore = 5.2 × 4
Average Q = 1.3
15 spores measured from the gill

The spores are smooth and nonamyloid, 4 spored basidia are present, and the scent is mild/indistinct.

Images

197572
197573
197574
197661
Spores
1000x
Mounted in melzers
1μ divisions
197662
Spores
1000x
Mounted in melzers
1μ divisions
197663
Cheilocystidia and basidia
1000x
Mounted in melzers
1μ divisions
197698
With KOH, the stem is staining reddish/orange after handling.
197699

Proposed Names

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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cystidia
By: Drew Parker (mycotrope)
2012-01-31 00:06:20 PST (-0800)

T. muricatum has no cystidia, and is sometimes bitter-farinaceous. T. dryophyllum has scattered filoform (threadlike) cystidia. T. ustale is another that grows with oaks. It is bitter and has no hymenial cystidia. (Shanks 1997)

Dryophyllum seems closest.

according to…
By: Richard and Danielle Kneal (bloodworm)
2012-01-30 21:48:31 PST (-0800)

mushroomexpert.com the spores fit.
spores 5-7 × 3-4 µ; recorded from California.

haven’t found any information on the cheilocystidia…

Yea
By: Byrain
2012-01-30 21:29:07 PST (-0800)

I ended up at T. muricatum and trying to make it fit unsuccessfully. There is some pine in the area (P. sabiniana) and it still does resemble P. muricatum. Does anyone know if P. muricatum has cheilocystidia? I’m not finding a good micro description.

i guess…
By: Richard and Danielle Kneal (bloodworm)
2012-01-30 21:03:06 PST (-0800)

a tad bit narrower.
the habitat matches more closely yes…
but, this was the first thing that popped in my mind so i decided to throw it up there.
it does resemble T. muricatum.

Created: 2012-01-30 22:39:07 COT (-0500)
By: Byrain
Summary: Smell/taste update

I guess the taste can be called farinaceous and when I made the cross section a similar strong farinaceous scent appeared (Previously I wasn’t able to smell anything). Afterwards I got distracted for around 20 minutes and when I came back I found the scent had almost completely faded.

Pileus – odor and taste farinaceous.

T. muricatum
By: Byrain
2012-01-30 20:56:55 PST (-0800)

Has narrower spores and the habitat matches more with T. dryophilum given the abundant live oaks. Some observations are saying T. muricatum is bitter tasting, I’m not finding any description that claims that yet, but this specimen is not bitter tasting.

Thanks
By: Byrain
2012-01-30 20:24:28 PST (-0800)

I think T. dryophilum looks pretty good so far, what other species could I consider?

Great observation as usual, Byrain
By: Christian (Christian Schwarz)
2012-01-30 19:54:42 PST (-0800)

I think T. dryophilum is not a bad start at all, it’s definitely in that group

Smell/taste update
By: Byrain
2012-01-30 19:39:07 PST (-0800)

I guess the taste can be called farinaceous and when I made the cross section a similar strong farinaceous scent appeared (Previously I wasn’t able to smell anything). Afterwards I got distracted for around 20 minutes and when I came back I found the scent had almost completely faded.

My best guess…
By: Byrain
2012-01-30 17:43:22 PST (-0800)

…is Tricholoma pessundatum group, but I’m not making much headway past that.

Taste
By: Byrain
2012-01-30 09:56:12 PST (-0800)

It tasted like Agrocybe pediades or A. praecox would, but stronger and more off-putting. I’ve seen this taste being referred to as cucumber-tasting in the past.

Created: 2012-01-29 22:17:51 PST (-0800)
Last modified: 2012-01-31 10:49:19 PST (-0800)
Viewed: 158 times, last viewed: 2016-10-25 22:51:05 PDT (-0700)
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