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Translator’s Note

Colors from Agaricus

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Name: Agaricus californicus Peck

Rank: Species
Status: Accepted
Name: Agaricus californicus
Author: Peck
Citation:
Version: 2
Previous Version: 1
Genus: Agaricus L.


Description status: Unreviewed

Notes:

This is a very deceptive mushroom. It can look identical to Agaricus campestris, the common (and edible) meadow mushroom. But, this one is NOT edible. To distinguish it from A. campestris, put a drop of KOH (Potassium Hydroxide) solution on the cap or stem. If it turns yellow, it is A. californicus. The KOH reaction is very rapid with a fresh sample, but may take a few minutes with an older mushroom. The yellow can sometimes be seen just by scratching the cap or the base of the mushroom, but this sort of bruising reaction can be weak or absent in A. californicus. The most reliable field characteristic is the odor. A. campestris has a mild ‘mushroomy’ odor. A. californicus has a ‘phenolic’ odor which is much less pleasant and more chemically. Another indicator is where it is growing. A. campestris grows in fields (or lawns), as its name implies. A. californicus tends to grow in woods or in disturbed areas. [much of this entry is extracted from rpeters observation notes on specimens he found in Prior Lake, MN.]


 Review Authors
Description editors: Nathan Wilson, Alan Rockefeller



Observations:

62157
Agaricus californicus Peck (27315)
Point Reyes National Seashore, Marin Co., California, USA: Darvin DeShazer (darv)
Observation made: 2009-10-24
Community confidence: 85%
60906
Agaricus californicus Peck (26776)
Sebastopol, Sonoma Co., California, USA: Darvin DeShazer (darv)
Observation made: 2009-10-15
Community confidence: 85%
57462
Agaricus californicus Peck (25504)
Petaluma, Sonoma Co., California, USA: Darvin DeShazer (darv)
Observation made: 2009-09-17
Community confidence: 85%
48118
Agaricus californicus Peck (22505)
Petaluma, Sonoma Co., California, USA: Darvin DeShazer (darv)
Observation made: 2009-06-17
Community confidence: 85%
29280
Agaricus californicus Peck (14265)
Sebastopol, Sonoma Co., California, USA: Darvin DeShazer (darv)
Observation made: 2008-11-15
Community confidence: 85%
21975
Agaricus californicus Peck (11266)
Petaluma, Sonoma Co., California, USA: Darvin DeShazer (darv)
Observation made: 2008-09-17
Community confidence: 85%
17459
Agaricus californicus Peck (9384)
Sebastopol, Sonoma Co., California, USA: Darvin DeShazer (darv)
Observation made: 2008-08-16
Community confidence: 85%
16508
Agaricus californicus Peck (8725)
Petaluma, Sonoma Co., California, USA: Darvin DeShazer (darv)
Observation made: 2008-08-07
Community confidence: 85%
58668
Agaricus californicus Peck (25977)
Soquel, Santa Cruz Co., California, USA: Shane (Mushane)
Observation made: 2009-09-29
Community confidence: 83%
57320
Agaricus californicus Peck (25450)
Soquel, Santa Cruz Co., California, USA: Shane (Mushane)
Observation made: 2009-09-18
Community confidence: 83%
55362
Agaricus californicus Peck (24885)
Aptos, Santa Cruz Co., California, USA: Shane (Mushane)
Observation made: 2009-09-01
Community confidence: 83%
62024
Agaricus californicus Peck (27268)
Mendocino, Mendocino Co., California, USA: Ryane Snow (snowman)
Observation made: 2009-10-24
Community confidence: 83%


Similar Observations:
(Someone proposed Agaricus californicus Peck for these observations, but consensus hasn’t accepted it. Confidence value is for this name, not the consensus name.)

16740
Agaricus xanthodermus Genev. (8844)
Santa Rosa, Sonoma Co.,California, USA: Debbie Drechsler (debdrex)
Observation made: 2008-08-06
Community confidence: 55%

Name Created: Tue Jan 09 21:04:00 -0500 2007
Last Modified: Wed Sep 05 10:37:30 -0400 2007 by Nathan Wilson (nathan)
Viewed: 372 times, last viewed: Wed Mar 17 11:14:50 -0400 2010
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