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24-03-2024 08:27

Thierry Blondelle Thierry Blondelle

HiOn Hedera helix fallen branchEcological habitat:

26-04-2024 10:07

Mathias Hass Mathias Hass

Hello, Does anyone know what this is? Found on J

24-04-2024 21:54

éric ROMERO éric ROMERO

Bonjour, J'ai trouvé ce Lasiobolus sur laissées

23-04-2024 15:18

Lothar Krieglsteiner Lothar Krieglsteiner

... but likely a basidiomycete. I hope it is o.k.

23-04-2024 13:17

Edouard Evangelisti Edouard Evangelisti

Bonjour à tous, Je viens de récolter ce que je

23-04-2024 21:49

Ethan Crenson

Hello all, A friend recently found this orange as

22-04-2024 11:52

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello,I made a loan of a collection of Microstoma

11-01-2022 16:36

Jason Karakehian Jason Karakehian

Hi does anyone have a digital copy of Raitviir A (

22-04-2024 08:54

Rafael Cabral

Bonjour à toutes et tous, Quelqu'un pourrait-il

22-04-2024 20:38

Miguel Ãngel Ribes Miguel Ángel Ribes

Good afternoon.Does anyone know this anamorph?It g

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Xylaria cinerea?
Lepista Zacarias, 29-05-2017 19:41
Hi everyone,
These specimens were growing on the remains of a tree (Quercus I believe). The appearance is similar to others found before and very similar to those of Xylaria cinerea as described in the paper:
Jacques Fournier, Fabienne Flessa, Derek Peršoh, and Marc Stadler: Three new Xylaria species from southwestern Europe, Mycol Progress 10 (1): 33–52, 2011.
However, the dimensions of the spores do not fit perfectly, since mainly their width are a bit bigger then expected; I measured
(14.1) 14.8 - 17.1 (19.5) × (5.4) 5.6 - 6.9 (7.6) µm
Q = (2.1) 2.3 - 2.9 (3.1) ; N = 37
Me = 16 × 6.2 µm ; Qe = 2.6
whereas the dimensions mentioned in the above cited reference are:
13–17 × 5–6 µm, (M=14.8 × 5.5 µm, n=30).
So, the question is: can this still be X. cinerea? If not, what species can be so similar?
I would appreciate if Jacques can say something; Any other opinion will be welcome as well.
Thanks in advance,
zaca
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Jacques Fournier, 29-05-2017 22:20
Jacques Fournier
Re : Xylaria cinerea?
Hi Zaca,
it's when ascospore size fits perfectly that you can have questions.
Dimensions are quite variable, you need to rely on other, less variable characters like the presence of minute black granulations on the surface of the stroma. It is the signature of X. cinerea and I am sure you will find them on your specimen.
Cheers,
Jacques
Lepista Zacarias, 29-05-2017 22:33
Re : Xylaria cinerea?
Hi Jacques,
Many thanks for your opinion.
As I not used to these characters, that's why I have questions. I think that what you call "minute black granulations on the surface of the stroma" can be already understood on the photo taken in loco, and very well visible with the hand lens. That, together with the whitish background, makes the very distinctive macro appearance of this species, kind of a reticulate with salient dots on the vertices of the reticulas. Is it?
Best regards,
zaca
Jacques Fournier, 29-05-2017 22:40
Jacques Fournier
Re : Xylaria cinerea?
the black dots you can see on your macro photo are the ostioles.
The minute granulations are located on the white scales, you need a good hand lens with good illumination or a stereomicroscope to see them.
See the attached photo
Jacques
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Lepista Zacarias, 29-05-2017 23:30
Re : Xylaria cinerea?
Hi again,
That's different from what I thought. Presently I have no stereomicroscope or hand lens appropriate, but I will try to see it anyway.
Thanks again and regards,
zaca
Lepista Zacarias, 30-05-2017 00:23
Re : Xylaria cinerea?
Hi Jacques,
I almost forgot the existence of my bad digital microscope. I attach two photo that NOW seem to correspond to your description of the back minute granulation on the white background.
Thanks and Best regards,
zaca

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Jacques Fournier, 30-05-2017 10:03
Jacques Fournier
Re : Xylaria cinerea?
yes it is.
Good luck,
Jacques