Observation 193947: Leucoagaricus Locq. ex Singer

When: 2014-12-17

Collection location: Oak Grove, Ripon, California, USA [Click for map]

Who: Randy Longnecker (Randy L.)

Specimen available

Growing under Valley Oak (Quercus lobata). Bruised red upon handling (even ring on stipe bruised), slowly fading to brown. Strong smell, almost fishy. Specimen very heavy, roughly 9-10 inches tall.

Proposed Names

-47% (2)
Recognized by sight
57% (1)
Recognized by sight: The habitat is different than i have ever seen it in, so i am not 100% sure (also microscopical data are necessary).

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Else and I had a brief exchange of email.
By: R. E. Tulloss (ret)
2014-12-18 08:56:55 PST (-0800)

She just wrote to say that she had proposed a name. There is no need to send me material. Thank you for being willing to do so.

Very best,


Yes the reaction was fast…
By: Randy Longnecker (Randy L.)
2014-12-17 21:49:15 PST (-0800)

I can send it to you if you really want to see it, I don’t want to waste your time though if it is just Leucoagaricus. This specimen was very heavy by the way, I have never felt any Leucoagaricus with that much weight to it. And although it was faded, the top of the stipe appeared to be pruinose and looked very Amanita-like.

The red bruising looks very bright red…
By: R. E. Tulloss (ret)
2014-12-17 17:01:16 PST (-0800)

Was it a very rapid reaction?

It does make me think of the blood red, rapid reaction that I see in the Leucoagaricus americanus that used to come up in my lawn in New Jersey. If the reaction is very rapid, that would not be what one normally sees in rubescent species of Amanita.

Very best,


A look at the stipe tissue and or gill tissue under the microscope…
By: R. E. Tulloss (ret)
2014-12-17 16:55:49 PST (-0800)

can resolve the issue. I’m willing to take a look if you are willing to send me all, or a part of, the dried specimen. A half of the fruiting body split vertically (even a quarter) would suffice for the basic check. Did the top surface of the partial veil have distinct raised, radial lines? Were the edges of the gills minutely decorated with a line of “fine fluffly stuff” running along the edge?

Very best,


I thought it might be an Amanita at first; however,
By: R. E. Tulloss (ret)
2014-12-17 16:22:40 PST (-0800)

a more careful look at the texture of the cap surface, made me think otherwise.

Very best,


Created: 2014-12-17 16:00:10 PST (-0800)
Last modified: 2017-01-18 10:35:59 PST (-0800)
Viewed: 117 times, last viewed: 2017-06-19 13:26:59 PDT (-0700)
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