Observation 24845: Macrolepiota Singer

When: 2009-08-31

Collection location: Georgia, USA [Click for map]

Who: AmatoxinApocalypse (AmatoxinApocalypse)

No specimen available

YUM!!! Found 5 of these yesterday, ate them all…hehehe.


The stipe on this one was 8 inches long.

Proposed Names

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= Observer’s choice
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Macrolepiota procera is a European species with a white spore print
By: else
2009-09-02 14:53:36 CDT (-0400)

The name ‘procera’ is one of the most misapplied names in lepiotology – it has been applied to every big scaly Macrolepiota in all parts of the world, but in fact is restricted to Europe. How far east its distribution goes is unknown at this time.
The species (plural) in eastern North America are still nameless.
Big, showy, edible, and nameless.
Green spore prints are as far as i know restricted to Chlorophyllum. Some Macrolepiota species can have a pinkish to pink spore print.

By: Irene Andersson (irenea)
2009-09-02 14:17:37 CDT (-0400)

Where does Michael Kuo say procera it’s not a european name?
As far as I know, the name procera was created by Scopoli, who described species from his surroundings (Austria by that time – Slovenia today) in “Flora carniolica”.

Is it a European name?
By: AmatoxinApocalypse (AmatoxinApocalypse)
2009-09-02 13:30:03 CDT (-0400)
Common problem
By: walt sturgeon (Mycowalt)
2009-09-01 20:04:19 CDT (-0400)

Giving a European name to an American species.

My earlier comment
By: Paul Derbyshire (Twizzler)
2009-09-01 03:09:38 CDT (-0400)

was in response to:

“I have been told by a reliable source that a heavy spore print of our American Parasol is actually greenish!”

Independently of whether this observation is or is not of the American Parasol, regarding which I have no opinion at this time.

C. rhacodes
By: Irene Andersson (irenea)
2009-09-01 02:32:23 CDT (-0400)

was my first impression from the first two pictures, but there are other reddening species too. When I look at the added third picture, I’m pretty sure it’s something else.
I can see that this one is much smaller and more slender than procera, the shape reminding more of Macrolepiota mastoidea, but not the cap surface really. So I don’t have anything to propose here.

If you are right about procera, it has to be a very particular american variety that doesn’t occur in Europe..

spore print
By: AmatoxinApocalypse (AmatoxinApocalypse)
2009-08-31 23:43:11 CDT (-0400)

spore print on this one was white, just like the other four I found that day.

they were growing alone, scattered throughout the forest.

I used mushroom experts page to make sure of the species, M. procera was the only one that fit.

Is it OK to post this link?


Also the stipe was very long, another feature that points to M. procera.

C. rhacodes in my experience has a thicker stipe, ive never seen it with such a long slender one like on these.

The other four specimens did not show any reddening, just this one which was nibbled on by slugs.

Doesn’t that point to …
By: Paul Derbyshire (Twizzler)
2009-08-31 21:27:33 CDT (-0400)
American Macrolepiota
By: walt sturgeon (Mycowalt)
2009-08-31 19:26:20 CDT (-0400)

Irene, We have called our common species procera (it’s not) and other names like gracilenta. I have been told by a reliable source that a heavy spore print of our American Parasol is actually greenish!

Doesn’t look like procera at all
By: Irene Andersson (irenea)
2009-08-31 17:41:51 CDT (-0400)

Reddening – and no darker pattern on the stem.