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05-03-2026 10:07

White apothecia on pine cone
Hulda Caroline Holte

Hello, I found and collected this species growing

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Phaeohelotium parasulphuratus ?
éric ROMERO éric ROMERO

Bonjour tous, Sur cône d'épicea fortement imbu,

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Hymenoscyphus?
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Bonjour à tousLe 24/02/2026 à Montmacq, devant m

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Helvella lacunosa
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Bonjour à tous,Sur 3 récoltes supposées de H. l

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Volutella?
Josep Torres Josep Torres

Hello.Some very tiny conidiomes collected in the D

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Orbilia?
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Good evening all,On March 4, 2026, I found the fol

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Is this Diaporthe rudis?
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Dear forum members, On the 2nd of February 2026,

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indian literature
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Hi forum, I'm now looking for another reference c

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Ciboria caucus?
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Good evening everyone,On March 4, 2026, I found th

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Xylaria grex oxyacanthae
Enrique Rubio, 11-06-2015 20:36
Enrique Rubio

Hi to everybody and specially Jacques Fournier


Today we have examined these gregarious stromata up to 40 mm high growing on buried seeds of Cornus sanguinea or Crataegus monogyna. We don't know what the host is because they are living together and the stromata were growing under both trees.


After reading wonderfull Fournier's keys we are observing that our ascospores are greater: 12-16 x 5-7 versus 11-13 x 4.6-5.9 sec. Jacques. Also we have seen that collections on Cornus seeds can be greater. The question is:  There is some innovation on this matter?


 


Many thanks in advance

  • message #36523
  • message #36523
  • message #36523
Enrique Rubio, 23-06-2015 20:08
Enrique Rubio
Re : Xylaria grex oxyacanthae
Since in this place there were only one Cornus mixed with a Crategus one, we gathered carefully only those that were growing on Crategus seeds. The result was surprising because the spores of these stromata growing on Crategus seeds show smaller ascospores according to the typical Xylaria oxyacanthae.
  • message #36673
Jacques Fournier, 26-06-2015 15:25
Jacques Fournier
Re : Xylaria grex oxyacanthae
Hola Enrique,
your observations are very interesting and strongly suggest that the Xylaria on Cornus fruits has larger ascospores than the one on Crataegus, as previously observed on the material collected by Peter Welt. I hope that will be sorted out on molecular grounds but it can be expected these fruit-inhabiting species are phylogenetically very closely related (see also X. delitschii). I have no new information so far.
Saludos,
Jacques
Enrique Rubio, 26-06-2015 17:02
Enrique Rubio
Re : Xylaria grex oxyacanthae

HI Jacques


Welcome from the Antillas. I wish that you have found nice fungi.


Well, we will analyze both collections and I will keep you informed.


Thanks a lot, jacques