Observation 30241: Tricholoma dryophilum (Murrill) Murrill

When: 2009-12-10

Collection location: Freedom Blvd., Aptos, California, USA [Click for map]

Who: Christian (Christian Schwarz)

Specimen available

This is a response to Doug’s recent challenge – this seems to satisfy the requirements of


Copyright © 2009 Christian F. Schwarz
Copyright © 2009 Christian F. Schwarz

Proposed Names

85% (1)
Eye3 Eyes3
Recognized by sight: Cream cap when young, at age with an evenly brown cap, viscid when young, dry in age, white spores, creamy gills becoming brown-spotted, taste of surface not strongly bitter, no distinct veil on creamy stipe with brown streaks
Based on microscopic features: Filiform cheilocystidia on young gill edge
28% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Hah! Not such a good start…
By: Douglas Smith (douglas)
2009-12-15 03:17:40 CST (-0500)

Well, there you go, brown Tricholomas strike again. They continue to refuse to be sorted into nice understandable species…

Possible mixed collection.
By: Christian (Christian Schwarz)
2009-12-15 01:04:44 CST (-0500)

Hold on. I think this is a mixed collection. Found a huge bunch of T. dryophilum today to compare and I think that only the smaller mushroom on the far right is actually it. I scoped the gill edge of that mushroom but you’ll notice that the other two are much browner (not cream-and orangey), and they were dry as opposed to viscid. The margin is also ribbed – not something I saw, even in old specimens of T. dryophilum today. Furthermore, the stipe of the larger specimens doesn’t look as scaly as the little one. See this observation for a more representative photo of the species of Tricholoma at far right: http://mushroomobserver.org/30354?search_seq=1105184

The larger ones may represent T. imbricatum or another darker brown pine-associate Trich.

Hah! good its a start.
By: Douglas Smith (douglas)
2009-12-14 04:38:31 CST (-0500)

Good, so here is a start for comparison. I only wish that you had tasted the context, not just the surface. I think there is some confusion about how bitter this species is, and perhaps that the amount of bitterness might be variable. But the bitterness is used often as a diagnostic character.

But good, so here is a little more to go on. Nice shot of clear cystidia on the gill edge.

Now the next challenge is for someone to get a photo of the ixotrichoderm of T. ustale for comparison. Not sure this one is all that possible, it was the only ixotrichoderm of Shank’s thesis, and a little odd in the listing. Also T. ustale is a European taxon, so perhaps the whole existence in California is in question. Which, of course for me just makes it all that more interesting to find.

Created: 2009-12-13 18:34:59 CST (-0500)
Last modified: 2012-09-08 15:34:54 CDT (-0400)
Viewed: 78 times, last viewed: 2018-01-26 15:24:48 CST (-0500)
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