Observation 167528: Panaeolus papilionaceus (Bull.) Quél.
When: 2014-06-15
No herbarium specimen

Proposed Names

Tao
-64% (4)
Recognized by sight: I see an annulus ring on the stem of two of the specimens in the second image. The spores collect on the very flimsy annulus, other wise the spores would not form a ring at one point on the stipe. The pitted caps look like P. semiovatus.
67% (5)
Eye3 Eyes3
Recognized by sight: those are spore deposits, not a “ring.”
Used references: current name – http://www.indexfungorum.org/...

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Byrain
By: Eric Smith (esmith)
2014-06-20 03:19:21 NPT (+0545)

You’re right. The raised, net-like pattern on the caps seems to be morphologically negligible. I mistakenly thought it was a feature of var. parvisporus. I traced my misunderstanding to a Shroomery thread, a wiki photo and some bad assumptions. Thanks for the help!

Pitted caps?
By: Byrain
2014-06-19 07:30:43 NPT (+0545)

I’ve never heard that feature being helpful before? Where did you read about it? Several Panaeolus can have that feature, but I can’t say I ever payed attention to which ones in detail or if some don’t do it. You are right about the fugaceous veil, but I’m not sure how real the difference between the two varieties is to begin with so I’d rather not vote for or against them without a detailed examination, especially based on subtle differences from a single relatively variable feature such as the veil. I wouldn’t go as far as deprecating the name yet…

Also, its not micro over macro or dna over both of them, all of them are important and have their place.

Edit: I am a little curious? Why would you vote “Not likely” for P. semiovatus which this is certainly not when you would vote “As if” on P. papilionaceus which this probably is?

Micro
By: Eric Smith (esmith)
2014-06-19 07:15:51 NPT (+0545)

over macro again? What about the pitted caps and lack of teeth on the margin?

Eric
By: Byrain
2014-06-19 07:07:25 NPT (+0545)

Panaeolus papilionaceus varieties are distinguished mostly by micro, not really much reason to use it otherwise. Here is the key for reference.

“3 Spores about 15-18 Lim long; cap distinctly appendi-
culate Panaeolus papilionaceus var. papilionaceus (12)
- Spores about 13-16 μm long; cap indistinctly appen-
diculate, veil very fugaceous
. .Panaeolus papilionaceus var. parvisporus (13)”

P. semiovatus and Anellaria in general have very little pigment and should not have such a red stem.

So…
By: Eric Smith (esmith)
2014-06-19 07:01:46 NPT (+0545)

parvisporus is no longer a variety? What are the determining factors for variety-level classification?

Created: 2014-06-16 06:56:14 NPT (+0545)
Last modified: 2014-06-20 03:48:46 NPT (+0545)
Viewed: 144 times, last viewed: 2016-11-26 13:09:15 NPT (+0545)
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