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12-07-2020 17:42

Juuso Äikäs

I found a lot of these growing gregariously on dea

12-07-2020 21:17


Bonsoir à toutes et à tous,Que pensez-vous de ce

12-07-2020 19:23

Andgelo Mombert Andgelo Mombert

Bonsoir, Sur bois mort décortiqué, immergé dan

12-07-2020 16:30

Gilbert MOYNE

Bonjour, Une récolte qui me pose quelques probl

09-07-2020 00:39

Valencia Lopez Francisco Javier

Hola a todosEncontré este curioso ascomycete a me

07-07-2020 13:34

Sergey Markov

I found this peziza sp. on loamy soil - on the gro

10-07-2020 17:50

Garcia Susana

Hola, Me gustaría vuestra ayuda para identificar

08-07-2020 00:01

Shane John

I would ask the indulgence of the group to perhaps

08-07-2020 16:47

Chris Yeates Chris Yeates

Bonjour tous While searching for the downy mildew

10-07-2020 14:26

Thomas Læssøe

Anybody in the know of eg Pseudoneottispora?See: 

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Hypoxylon rubiginosum?
Enrique Rubio, 18-07-2011 18:55
Enrique RubioHi to all:

These resupinate stromata grow on wood of Fagus sylvatica. KOH 10% extractable pigments are orange red but peripherically purplish. Asci have an apical apparatus Mlz. negative but bluish in IKI.
Could be H. rubiginosum?

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Enrique Rubio, 18-07-2011 19:43
Enrique Rubio
Re : Hypoxylon rubiginosum?
Dear René:

No smell I have noted, perithecia are 375-575 microns high and stromata are small (only 3-4 cm)
Jacques Fournier, 18-07-2011 20:59
Jacques Fournier
Re : Hypoxylon rubiginosum?
Hi Enrique,
I guess  you studied it in detail because it seemed a bit strange to you. The results of your chromatography are indeed surprising.
I would be glad to see it and I will forward it to Marc to study its HPLC profile.
Thanks in advance,
Enrique Rubio, 19-07-2011 12:13
Enrique Rubio
Re : Hypoxylon rubiginosum?
OK., Jacques. I will send you my material

Best wishes
Jacques Fournier, 28-09-2011 10:44
Jacques Fournier
Re : Hypoxylon rubiginosum?
Dear Enrique,
I eventually received your specimen, thanks!
I wonder if two different Hypoxylons were not mixed up in your collection because I failed to see any purplish tinge around the orange pigments obtained on a paper with KOH, following your method.
Ascal rings also differ from what you observed in that they turn blue in Melzer and IKI as well.
I first though your fungus might be H. canariense, so far known only from Canary Islands where it is very common, in which I sometimes observed dubious reactions of ascal rings to iodine, but I do think the one you sent me is a depauperate form of H. rubiginosum.
Many undescribed species of Hypoxylon likely are still to be discovered, most of them  resembling H. rubiginosum in gross morphology. Keep on screening them!
With best wishes,
Enrique Rubio, 28-09-2011 12:31
Enrique Rubio
Re : Hypoxylon rubiginosum?
Many thanks for your study, Jacques