Observation 26951: Agaricus L.

I’m not much of a systematist, but there were enough specimens at different stages of emergence that a couple really struck me as amanitas, though possibly not the one or two deadly species that I’m vaguely familiar with.

[admin – Sat Aug 14 02:04:10 +0000 2010]: Changed location name from ‘Olema Valley, Pt. Reyes National Seashore’ to ‘Olema Valley, Point Reyes National Seashore, Marin Co., California, USA’


Specimens at various stages of emergence; note esp. specimens at top of frame, just to left and right of center.

Proposed Names

-10% (2)
Recognized by sight
28% (1)
Recognized by sight
53% (3)
Recognized by sight: gotta flip over a mushroom and check the gills!
12% (3)
Recognized by sight: Based solely on the growth on a well-rotting log (61394) plus fibrils on the cap. Specimens look quite young. Would have needed to get photos of the gills, especially the gill coloration for better identification. A spore print would have been nice, too.

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= Observer’s choice
= Current consensus


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Appreciate the helpful feedback
By: Jonathan King (buckyboy)
2009-10-22 14:50:19 EDT (-0400)

Thanks all for the education re both this shroom in particular and website preferences in general. Will attempt to learn how to take & interpret spore prints, I reckon … and to remember to shoot more and better pix!

Agaricus sp. ?
By: Patrick Harvey (pg_harvey)
2009-10-22 10:41:50 EDT (-0400)

Next time dig a couple out completely (including all of the base) and get shots of the top, side, and underside. That will give us more to go on for ID. A spore print will also help.

Nice photos in the original setting!

By: Alan Rockefeller (Alan Rockefeller)
2009-10-22 00:05:16 EDT (-0400)

I don’t think the mushrooms in the first photo are the same species as the ones in the second photo. The first photo looks like Tricholoma to me and the second is clearly Agaricus.

I don’t think so…
By: R. E. Tulloss (ret)
2009-10-21 13:01:04 EDT (-0400)

I don’t think these are amanitas.

Nice photo.

Very best,