Observation 80366: Agaricus californicus Peck

When: 2011-10-22

Collection location: Timber Cove Inn, Sonoma Co., California, USA [Click for map]

Who: Danny Newman (myxomop)

No specimen available

Taste nondescript, odor weakly phenolic. Material is obviously aged.



Proposed Names

29% (1)
Recognized by sight
-14% (3)
Recognized by sight
65% (3)
Eye3 Eyes3
Recognized by sight: latently lutescent, smaller & thinner annulus than A. xanthodermus.
Used references: ID confirmed by Dennis Desjardin

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
judging by the data
By: Danny Newman (myxomop)
2011-10-24 21:59:22 MDT (-0600)

in this observation and this observation alone, I completely agree that making a distinction between A. xanthodermus and A. californicus would be a bit of a shot in the dark. that said, with specimen in hand, Desjardin went to A. californicus straight away, indicating that even in aged fruit bodies exist one or more indications of one species versus any other. he ran off a list of what made my four decrepit, shriveled, reactionless Agarici A. californicus over any other phenolic, yellow-staining Agaricus, but I can’t recall what they were (the man has a tendency to speak at the speed of light). something to do with the grassy habitat beside a parking lot, i think, among other traits…

I never said it did
By: Byrain
2011-10-24 20:54:35 MDT (-0600)

Was just giving an example at how the annulus can degrade.

By: Danny Newman (myxomop)
2011-10-24 19:50:35 MDT (-0600)

does not yellow at all. It appears that someone tossed the material at the end of class. Otherwise it was second on my list for microscopy.

By: Byrain
2011-10-24 17:09:34 MDT (-0600)

The annulus on both A. xanthodermus and A. californicus can look like that in age or even be absent leading to confusion with A. campestris and similar species.

By: Byrain
2011-10-24 15:17:12 MDT (-0600)

You’re not going to get a good staining reaction from aged A. xanthodermus. Can you measure the spores?

Created: 2011-10-23 16:09:51 MDT (-0600)
Last modified: 2011-10-24 22:03:00 MDT (-0600)
Viewed: 95 times, last viewed: 2018-09-14 19:27:25 MDT (-0600)
Show Log