Observation 53469: Agaricus augustus Fr.
When: 2010-09-20
No herbarium specimen


Copyright © 2010 Adam S.
Copyright © 2010 Adam S.
Copyright © 2010 Adam S.
Copyright © 2010 Adam S.
2 days later, the gills have browned considerably – these are the same two mushrooms as originally posted.
Copyright © 2010 Adam S.

Proposed Names

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Eye3 Eyes3
Recognized by sight
-29% (3)
Recognized by sight

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Add Comment
looks good
By: caphillkid
2010-09-23 13:13:21 PDT (-0700)
Yeah those are enormous, sure looks like Augustus in the latest set of pics. Enjoy.
Thanks Adam
By: Christian (Christian Schwarz)
2010-09-23 11:52:59 PDT (-0700)

I can feel more confident about this one now. I interpret the lower stem texture as once-scaly but now old and smooshed/collapsed.

I am surprised
By: Christian (Christian Schwarz)
2010-09-22 09:55:34 PDT (-0700)

that this was called A. augustus at an MSSF meeting. I have to take that opinion seriously, because of the expertise and familiarity that those members have with this mushroom (and Agaricus as a whole).
But I’m still very skeptical – the lack of scales on the stems below the ring, the off-color cap (should be more golden-brown), and the gestalt of the gills just don’t add up in my mind.

confirmed it is Augustus
By: Adam Singer (adam)
2010-09-22 09:37:48 PDT (-0700)

The gills are not as pink as they look in the photo but more pinkish/brown and MD does say that they may be pinkish very briefly. Last night at the MSSF meeting it was confirmed by several experienced people that these are indeed Agaricus augustus.

pink gills
By: caphillkid
2010-09-21 21:44:36 PDT (-0700)
I do not think Augustus’ gills go through a pink stage. Both Mykoweb and Rogersmushrooms describe the gills as pale then chocolate brown/black. The orange forms of this mushroom that I have found in the PNW do not go through a pink stage either. I’m not sure what this is, but I do not think it is Augustus since your picture clearly shows a pinkish gill stage.
it was growing right next to the smooth capped Agaricus
By: Adam Singer (adam)
2010-09-21 16:40:50 PDT (-0700)

Is very possible I’ve misidentified this. There were growing within a foot or two of those I posted in http://mushroomobserver.org/53470?q=1nMH. Is there a species that can be smooth or scaly/fibrillose cap. Also upon re-reading Arora, the stalk should also be scaly and none of the stalks were scaly. There is a mild, sweet almond odour to them.

By: caphillkid
2010-09-21 16:31:01 PDT (-0700)

Color doesn’t seem brownish enough for Augustus, but the picture may be throwing me off.

Created: 2010-09-21 16:22:12 PDT (-0700)
Last modified: 2012-01-24 11:09:16 PST (-0800)
Viewed: 128 times, last viewed: 2016-09-06 20:30:36 PDT (-0700)
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