Observation 134833: Agaricus augustus Fr.

When: 2013-05-29

Collection location: Muddy Creek Rd., Yamhill Co., Oregon, USA [Click for map]

45.0° 123.0° 237m

Who: V. Berthelsdorf (Berthelsdorf)

Specimen available

Found below a sequoia planted by a stream.
The cap on the largest is about 23cm’s wide with fine scales and a yellow,red golden color on the older specimens.. In the photo of the ones picked, all but the top of one were below the thich matted sequoia needle duff. These were trying to emerge from the heavy layer of needles and had twisted together and lifted the needle mat up. The stipes were quite long, up to 25cm, scaley, and had a swelling at the very base. The annulus are fragile and thin.
You can sort of see that there is a sort of bulb on the base of the upper left specimen in the harvested picture. These broke off of most of them when I harvested them as they were tight in the soil.
The spore print looked initially blackish, but with enough spores it was clearly dark chocolate brown.
No noticeable almond odor on the specimens that were above the duff, or when cooked, but slightly licorice-like to my nose, from the group that were opening below the thick duff of sequoia needles.


first guess id’d as A.augustus
also guess id as A.smithii
as first seen. sequoia needle matted Duff 10 to 15cm deep

Proposed Names

24% (3)
Used references: Arora. web
30% (2)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: christopher hodge (christopher hodge)
2013-05-29 17:42:03 PDT (-0700)

I just trusted Kuo in his description of the species distribution that it is restricted to california and the eastern US


Given your mushrooms were in duff of a Sequoiadendron fits more the habitat of A. augustus.

But then i saw this observation of a similar subfurescens-esque mushroom.


Guess it doesn’t matter what you call it as long as it tastes good!

By: V. Berthelsdorf (Berthelsdorf)
2013-05-29 09:22:02 PDT (-0700)

Considered A.augustus and smithii. Augustus seems to have larger scales on the cap, and it’s the wrong season for A.smithii.

By: V. Berthelsdorf (Berthelsdorf)
2013-05-29 09:12:13 PDT (-0700)

They were delicious with elkburger!

Created: 2013-05-29 08:50:36 PDT (-0700)
Last modified: 2017-07-10 11:56:23 PDT (-0700)
Viewed: 104 times, last viewed: 2018-01-09 13:17:16 PST (-0800)
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