Observation 223880: Panaeolus (Fr.) Quél.
When: 2015-11-07
Who: zaca
No herbarium specimen

Notes: Growing on the banks of an artificial lake, among herbaceous plants and burried wood; cow dung is also common there.

Images

578695
578696
578697
578698
An older specimen nearby;
578699
An older specimen nearby.
579131
Microscopy: Spores;
579132
Microscopy: Basidia;
579133
Microscopy: (mainly) Basidioles;
579134
Microscopy: Cheilocystidia-1;
579135
Microscopy: Cheilocystidia-2;
579136
Microscopy: Cheilocystidia-3;
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Microscopy: Pileipellis-1;
579138
Microscopy: Pileipellis-2;
579139
Microscopy: Stiptipellis.

Proposed Names

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Comments

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Microscopy added.
By: zaca
2015-11-28 02:39:19 PST (-0800)
Yeah, it would be interesting…
By: zaca
2015-11-27 10:55:53 PST (-0800)

such study. Meanwhile, we have to classify our specimens with the existing tools, which give much weight to spore size.
I also can add now that, in the case od these specimens, I already look at the spores and got the following dimensions:
(9.9) 10.8 – 13 (15) x (6.4) 7.4 – 9.5 (11.7) µm
Q = (1.2) 1.3 – 1.6 (1.7) ; N = 49
Me = 11.8 × 8.3 µm ; Qe = 1.4 .
So, the same happened again. These dimensions " de per si" rule out the species mentioned before.
Maybe tomorrow I will be able to finish the micro observation and upload some photos from it then.

It would be interesting
By: Alan Rockefeller (Alan Rockefeller)
2015-11-26 18:06:20 PST (-0800)

to compare spore size with DNA sequences among various collections. Unless spore size correlated to a different sequence, I would hesitate to put much weight on the size.

Hi Alan,
By: zaca
2015-11-26 16:34:01 PST (-0800)

It is still to be proven the existence of undoubtful specimens of Panaeolus antillarum and of Panaeolus semiovatus var. phalaenarum at this place, where I have found last year a number of specimens of Panaeolus. Not that the macro features doesn’t fit, but at the end the spores are always too small for those species. I will try to observe it under the scope in the next days. Let´s wait and see …
Regards,
zaca

Created: 2015-11-26 12:32:22 PST (-0800)
Last modified: 2015-11-28 02:38:59 PST (-0800)
Viewed: 56 times, last viewed: 2015-12-28 09:37:47 PST (-0800)
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