When: 2017-05-27

Collection location: Parque de Monsanto, Lisboa, Portugal [Click for map]

Who: zaca

No specimen available

This observation is very much related with Observation 92761, which I updated already this year.
I think to have found the original place of the above mentioned observation, of which I only remembered the zone of the park where it occurred. Let’s wait to see if the micro confirms.


Microscopy: Asci (x1000, in ammonia);
The host, the remains of a fallen tree.
Microscopy: Sections (x100, in ammonia);
Microscopy: Other sections (x100, in ammonia);
Microscopy: Asci (x400, in ammonia);
Microscopy: Asci (x400, in ammonia and lugol);
Microscopy: Free spores (x1000, in ammonia);
Microscopy: Spores exhibiting a germ slit (x1000, in ammonia); Note that for better seeing the slit it is convenient to slightly unfocus the spore, maybe due to optical reasons.
Stroma surface showing black granulation on a white background; photo taken with a digital microscope;
Stroma surface (little piece) showing black granulation on a white background; photo taken with a digital microscope;

Proposed Names

29% (1)
Recognized by sight
87% (1)
Recognized by sight: See the comments of observation 47616.
Used references: Jacques Fournier, Fabienne Flessa, Derek Peršoh, and Marc Stadler, Three new Xylaria species from southwestern Europe, Mycol Progress 10 (1): 33–52, 2011.
Based on microscopic features

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= Observer’s choice
= Current consensus


Add Comment
Ah, excellent!
By: Roo Vandegrift (Werdnus)
2017-10-03 18:02:23 CDT (-0400)

I’m glad you’ve collected it again, and a bit more of a typical specimen.

The key for the ID of this species is the stroma surface!
By: zaca
2017-05-30 05:12:59 CDT (-0400)

I posted a topic at AscoFrance with these specimens
where Jacques Fournier, the first author of my reference and to whom I thank the identification, promptly replied. Quoting from one of his messages, in relation to my strangeness about the spores dimensions:
“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”.
Then I observed the stroma surface (see the new attached photos) and … that’s it!

Created: 2017-05-27 19:29:22 CDT (-0400)
Last modified: 2017-05-30 05:10:21 CDT (-0400)
Viewed: 59 times, last viewed: 2019-08-12 23:59:15 CDT (-0400)
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