Observation 44560: Pluteus cervinus (Schaeff.) P. Kumm.
When: 2010-04-22
Collection location: Slovenia [Click for map]
No herbarium specimen

Notes: Max cap diameter 15 cm. On pile of humuous dirt.

Images

83910
84411
There were only 2 -3 mushrooms last week, now there is a whole bunch. Here are additional images. Figured out that this must be edible, as local experts clamis that can’t be mistaken for other poisonous mushrooms.
84412
There were only 2 -3 mushrooms last week, now there is a whole bunch. Here are additional images. Figured out that this must be edible, as local experts clamis that can’t be mistaken for other poisonous mushrooms.
84413
There were only 2 -3 mushrooms last week, now there is a whole bunch. Here are additional images. Figured out that this must be edible, as local experts clamis that can’t be mistaken for other poisonous mushrooms.

Proposed Names

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Recognized by sight
34% (4)
Recognized by sight

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Eye3 = Observer’s choice
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Comments

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Thanks Douglas!
By: Irene Andersson (irenea)
2010-04-23 07:37:50 CDT (-0500)

The links from Michael Wood was exactly what I had been searching for without succeding.. Perhaps they should be included in the description of Pluteus magnus too?

I wasn’t sure how to interprete the description of the cystidia, “with one or two triangular points”, but Singer’s drawings and your micro shots of the cystidia were enlightening.
Well, this really shows the importance of microscopy. This genus is difficult enough with a microscope.

Some more info…
By: Douglas Smith (douglas)
2010-04-23 06:44:00 CDT (-0500)

Also in the “Pluteus of the Midwest” article, it says this under P. cervinus:

“surface often wrinkled at first but becoming even in age”.

So, do with that as you will…

And was discussed before that.
By: Douglas Smith (douglas)
2010-04-23 06:41:17 CDT (-0500)

I had discussed it rather early on in this obs.

http://mushroomobserver.org/6783

And there are some ref. there supplied by Mike Wood. It think if you do a search on Google Books you might be some more info. Oh, also there is this:
“The Genus Pluteus section Pluteus in the Midwestern US”, P. Banerjee and W. J. Sundberg, Mycotaxon vol. LIII pp189-246. I found this online somewhere…
P. magnus is on p.214.

But I put these under the scope there, and I think the important fact is that the cystidia do not have “hooks” on the end, like P. cervinus. I have a photo of this on the obs., although it was one of the first tries at those types of photos when I first got the scope… not very good, but you can see the cystidia without the “hooks” of P. cervinus. Still pointed and thick-walled, but no hooks.

The wrinkled cap
By: Irene Andersson (irenea)
2010-04-23 06:13:01 CDT (-0500)

is a given character for cervinus. Pluteus magnus is not known from Europe.

The descriptions of Pluteus magnus are very confusing, because McClatchie originally described it as a large and sturdy mushroom with a white to greyish cap with scales, while many others describe it with a nearly black and wrinkled cap, resembling atromarginatus.
I don’t know how well his type collection has been studied, and I can’t see any evidence that its DNA has been sequensed and compared to others. From the original description, it seems to me like a species closer to Pluteus petasatus than to cervinus.

I also find it very strange that there are no pictures to be found on the web of Pluteus magnus – except from the ones here at MO.
Well, I saw that the species has been discussed here before..
http://mushroomobserver.org/22291?q=FNV

Not sure -
By: Douglas Smith (douglas)
2010-04-23 00:25:16 CDT (-0500)

I don’t think that the coarsely wrinkled hypothesis is really proven as a unique character of that species. You really need to look and see if it has hooked cystidia. It would be good if some more people did, and we could tell if the wrinkles are really a good feature of the species or not…

Confirmed hypotesis
By: BubikolRamios
2010-04-23 00:06:39 CDT (-0500)

According to another image in galery, and this text:
“An edible agaric found in piles of hardwood sawdust; the caps are black and coarsely wrinkled.”
found on net I would confirm your hypotesis.

Is my hypothesus
By: Johannes Harnisch (Johann Harnisch)
2010-04-22 19:32:07 CDT (-0500)

of Pluteus magnsu having a wrinkled cap and P cervinus as smooth one right?

Created: 2010-04-22 15:47:05 CDT (-0500)
Last modified: 2012-01-16 08:46:51 CST (-0600)
Viewed: 133 times, last viewed: 2016-05-13 10:02:52 CDT (-0500)
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