Observation 184777: Agaricus xanthodermus Genev.
When: 2014-10-21
No herbarium specimen
0 Sequences

Growing under redwoods in various places around campus. Odor phenolic. White and cap smooth when young, developing faint brown fibrils and faint brown spot in middle. Not yellowing.

Proposed Names

27% (1)
Recognized by sight
Used references: Mushrooms of WNA, Mykoweb
55% (1)
Recognized by sight: A. californicus tends to be a grass lawn species that tends to be less robust, less lobed, and with a straighter stipe without the crooked base shown here. Did you scrape the stipe base? That’s the portion that yellows most intensely. The strong phenolic odor is also a pointer towards A. xanthodermus (which is now one of the most common mushrooms in the state, unlike A. californicus which appears to be increasingly uncommon and local)

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Connor Adams (CLAdams)
2014-10-22 00:19:55 CDT (-0500)

Thanks for your input,

I’ve been finding these a lot these past few weeks, sometimes they have a strong odor, sometimes not. I have never thought of them as staining yellow, at least not like I’ve seen with pictures of A. xanthodermis.

I just scratched the stipe and it did immediately change color to a pale pale yellow, and then turned a strong reddish brown.

I’ll get another picture when they are more mature in a few days, anything else I should check?

Created: 2014-10-21 22:48:45 CDT (-0500)
Last modified: 2014-10-21 23:07:33 CDT (-0500)
Viewed: 16 times, last viewed: 2017-06-19 03:36:17 CDT (-0500)
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