Observation 278638: Agaricus L.

When: 2017-06-07

Collection location: Wilkes-Barre, Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

No specimen available

I think this is the same fruit body as the one seen (buried) here obs 278330. I had hoped it would have matured a bit further.

Orange spot on cap seen in last photo is the result of KOH.


90 minutes after sectioning

Proposed Names

58% (1)
Recognized by sight
55% (1)
Recognized by sight: All three obs. are agaricus bisporus imo. Habitat.

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= Observer’s choice
= Current consensus


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I don’t have Kerrigan’s Agaricus book yet.
By: Dave W (Dave W)
2017-06-11 22:38:23 CDT (-0500)

But, my understanding is that A. bisporus is unlikely to be found in nature in eastern NA. What source(s) are you using, Ryan?

These fruit bodies form underground and break through the surface just prior to maturity. This suggests something close to A. bitorquis. However, Agaricus species placed in a different section also exhibit this growth pattern. Previous micro-analysis appears to point toward something close to A. pilosporus.

Created: 2017-06-11 21:00:10 CDT (-0500)
Last modified: 2017-06-11 21:30:33 CDT (-0500)
Viewed: 34 times, last viewed: 2018-08-25 16:20:01 CDT (-0500)
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