Observation 92761: Xylaria Hill ex Schrank
When: 2012-04-14
Who: zaca
No herbarium specimen


The original photo of the specimens and the corresponding photo of the exsicata;
The KOH test to see if there exist any pigment soluble;
Microscopy: Hymenium views (x400, in KOH and in cresyl blue);
Microscopy: Asci (x400, in KOH); a photo with spores was superimposed, one shows “clearly” a straight germ slit.

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Curiosity and new data:
By: zaca
2017-03-22 21:50:20 WIB (+0700)

This observation goes back to almost five years ago. It happened by hazard that recently I saw in my desorganized “herbarium” the exsicata of some specimens and recalled this observation. Then I decided to see if microscopy will give any relevant information about it. Quite recently I also got a paper (from 2011) about some new species in this region:
Jacques Fournier, Fabienne Flessa, Derek Peršoh, and Marc Stadler, Three new Xylaria species from southwestern Europe, Mycol Progress 10 (1): 33–52, 2011;
and I was curious about if this could be any of those new species. There is one, X. cinerea, that was already mentioned by Roo Vandegrift (Werdnus) in one of my observations (observation 47616), that morphologically seemed promising.
I was not lucky with the microscopy, since only a few mature spores were observed and these inside the asci. Thus, the dimensions obtained are not fully representative:
(14.3) 15.2 – 17 (17.6) × (5.4) 5.7 – 6.7 (7.5) µm
Q = (2.1) 2.3 – 2.9 (3) ; N = 25
Me = 16.2 × 6.2 µm ; Qe = 2.6;
and another important feature, the germ slit, could be observed in just one spore (a photo of it was superimposed to the photo of the asci attached). Nevertheless, at the end, it seems that X. cinerea is a truly candidate for the classification. I already attached to this observation the new photos with the material mentioned above.

Created: 2012-04-15 00:22:18 WIB (+0700)
Last modified: 2017-03-22 21:48:56 WIB (+0700)
Viewed: 31 times, last viewed: 2017-07-25 02:49:36 WIB (+0700)
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