Observation 23109: Agaricus xanthodermus Genev.
When: 2009-07-11
No herbarium specimen

Notes:

[admin – Sat Aug 14 02:01:58 +0000 2010]: Changed location name from ‘Laguna @ Chestnut St., San Francisco, CA USA’ to ‘Laguna St. and Chestnut St., San Francisco, California, USA

Proposed Names

71% (4)
Eye3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Also stains differently…
By: Nathan Wilson (nathan)
2009-07-13 06:45:18 SAST (+0200)

Agaricus arvensis stains yellow which darkens slightly to an orange tone, but still with a lot of yellow. A. xanthodermus usually stains more quickly to a brighter yellow which then darkens to a light brown. The staining colors I see on the stipe look like the typical color of A. xanthodermus after the stain has darkened.

It differs first of all by the smell which is almond-like or anisette-like in A.arvensis
By: Gerhard Koller (Gerhard)
2009-07-13 00:56:00 SAST (+0200)

and nauseous and hospital-like in A.xanthodermus.

Yellowing
By: Micah Courteau (waynegrompsky)
2009-07-12 18:28:04 SAST (+0200)

Yes, when I split the mushroom down the center the outer side of the base of the stem stained yellow

How does it……….
By: Johannes Harnisch (Johann Harnisch)
2009-07-12 17:36:41 SAST (+0200)

differ from Agaricus arvensis

Did it stain yellow in the base of the stalk?
By: Gerhard Koller (Gerhard)
2009-07-12 17:07:16 SAST (+0200)
Looks like A. xanthodermus
By: Nathan Wilson (nathan)
2009-07-12 06:38:02 SAST (+0200)

I can’t tell for sure without seeing a fresh bruise of the edge of the cap and/or knowing that if it’s odor is phenolic (unpleasant) or sweet. However, the brownish stains, the pure white cap and the look of the veil make me think it’s probably A. xanthodermus. Without these extra details it’s probably best to just call it Agaricus sp..

BTW, big improvement on the photos!

Created: 2009-07-12 02:59:14 SAST (+0200)
Last modified: 2011-09-30 23:23:56 SAST (+0200)
Viewed: 92 times, last viewed: 2016-04-07 11:58:53 SAST (+0200)
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