Observation 75618: Agaricus L.

When: 2011-08-27

Collection location: Aporo, Michoacan, Mexico [Click for map]

Who: Byrain

No specimen available

Growing where forest/pasture meets, smelled good & tasted good.

Odor of almonds.


Copyright © 2011 Alan Rockefeller
Specimen ready for microscopy
Copyright © 2011 Alan Rockefeller
Pileus cross section 40x
Pileus cross section 100x
Pileipellis 100x
Pileipellis 100x
Pileipellis 400x
Copyright © 2011 Alan Rockefeller
Spores 400x
Spores 1000x
Copyright © 2011 Alan Rockefeller
With KOH
Copyright © 2011 Alan Rockefeller
With KOH
Copyright © 2011 Alan Rockefeller
With KOH
Copyright © 2011 Alan Rockefeller
With KOH

Proposed Names

58% (3)
Eye3 Eyes3
Recognized by sight
-31% (3)
Recognized by sight: it also appears to yellow (at stipe base and cap)…did it bruise any color?
got KOH?
31% (2)
Based on microscopic features: Spores are a bit too large for this taxon

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
On the other hand,
By: Irene Andersson (irenea)
2011-12-10 11:23:37 EST (-0500)

members of the genus Agaricus, being saprophytic, should be expected to occur just about anywhere..
This looks perfectly like our Agaricus porphyrizon, a close relative to semotus. I’d be surprised if its distribution is restricted to Europe.

Names and relationships
By: Rick Kerrigan (rwkerrigan)
2011-12-10 08:04:04 EST (-0500)

A few comments. Not only are the Agaricus species of the sub-tropics and tropics relatively unknown (and largely un-named), even their relationships are not well understood. A major paper by Zhao et al. will be out soon; I predict that it will profoundly alter our perspective on groups (i.e. sections) of Agaricus in ‘the tropics’. Applying higher-latitude names towards the equator has slim odds of being correct. That said, this collection is not A. subrutilescens. Most likely relationship choices would be in section Minores or in an unnamed sister section (one that has recently become evident in the Caribbean).

Scent and taste variations.
By: Jeff Riedenauer (Tamsenite)
2011-09-08 16:25:50 EDT (-0400)

Yes I agree that smell and taste are good characteristics for taxa perposes. I have found that these can vary greatly in the same speices due to area/habatat and/or conditions or time of year. I.E. b. edulis I find in the coastal mountians are more fruity and nutty as to the high elevation mountianous version are super meaty. A. agustus found in the summer tends to have less of an almondy smell than ones found in the fall or spring and the differences between later flushes with l. rubidus(candy caps). The scent and flavor weakens greatly.

By: Eric Geller (sagacious)
2011-09-08 15:19:47 EDT (-0400)

is interesting. To me, A subrutilescens sometimes smells so almondy it’s almost too strong a scent for my taste when incorporated into a recipe. To me, B edulis smells sometimes like sourdough bread, sometimes has a sweet pine scent, sometimes like semisweet chocolate, and sometimes fruity/appley. I reckon it’s a reminder that scent is a subjective character when used to both confirm or disconfirm an identification.

By: Christian (Christian Schwarz)
2011-09-08 07:47:49 EDT (-0400)

I smell a slightly sweet/portobello fragrance, but not almondy like Section Arvenses.

smell, flavor
By: Jeff Riedenauer (Tamsenite)
2011-09-08 05:03:56 EDT (-0400)

A. subrutilescence does not smell like almonds to me, but the flavor is unforgetable. Like a portabella but twice as strong, very rich.

By: Byrain
2011-09-07 21:03:20 EDT (-0400)

It doesn’t strike me as A. subrutilescens, these were rather small and I agree with Christian that I wouldn’t think its in Sanguinolenti, maybe Minores. I didn’t notice any red staining, only yellow. We had KOH, but I am not sure if this was ever tested, maybe Alan knows.

Edit: Looking at the pictures makes me think they get less red over time.

By: Christian (Christian Schwarz)
2011-09-07 20:48:38 EDT (-0400)

I doubt that it’s in Sanguinolenti – doesn’t appear to be one of the red-bleeders…
Does anyone else find the A. subrutilescens odor almondy?

The scent
By: Eric Geller (sagacious)
2011-09-07 15:28:15 EDT (-0400)

of A subrutilescens is distinctly almond in my area on the West Coast, and aside from visual characters, that contrasts with the phenol scent of our closest local look-a-like, A hondensis. But, yes, the stipe would normally be shaggier. Good luck on ID with your specimen.

What we call
By: Christian (Christian Schwarz)
2011-09-07 07:34:48 EDT (-0400)

A. subrutilescens on the west coast doesn’t smell like almonds (it is not in section Arvenses), and doesn’t yellow in KOH (it turns greenish gray).

Also, A. subrutilescens should have a shaggy-felty stipe below the veil.

The ones I posted below did smell like almonds.

Looks like it may be
By: Eric Geller (sagacious)
2011-09-07 01:29:05 EDT (-0400)

A. subrutilescens based on the wine-colored cap, thin (not thick) ring, the non-bulbous stipe base, collection habitat, apparently excellent flavor, and characteristic almond scent.

Odor of almomds
By: Alan Rockefeller (Alan Rockefeller)
2011-09-07 00:27:12 EDT (-0400)

The stem bases of this collection had the odor of almonds.

I also have microscopy of the spores.

Like these, sort of:
By: Christian (Christian Schwarz)
2011-09-06 19:51:41 EDT (-0400)

Created: 2011-09-06 19:35:25 EDT (-0400)
Last modified: 2011-12-10 18:26:48 EST (-0500)
Viewed: 256 times, last viewed: 2018-05-29 17:17:53 EDT (-0400)
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