02-07-2025 18:45
Elisabeth StöckliBonsoir,Sur feuilles d'Osmunda regalis (Saulaie),
02-07-2025 17:26
Yanick BOULANGERBonjourRécolté sur une brindille au fond d'un fo
02-07-2025 09:32
Nicolas VAN VOOREN
Hello, bonjour.Here is the paper I'm searching for
30-06-2025 16:56
Lydia KoelmansPlease can anyone tell me the species name of the
01-07-2025 23:37
Josep Torres
Hello.A Pleosporal symbiotic organism located and
30-06-2025 12:09
Edvin Johannesen
This tiny, rather "rough" erumpent asco was found
30-06-2025 06:57
Ethan CrensonHi all, Another find by a friend yesterday in Bro
30-06-2025 14:45
Götz Palfner
This is a quite common species on Nothofagus wood
25-06-2025 16:56
Philippe PELLICIERBonjour, pensez-vous que S. ceijpii soit le nom co
Hi 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?
No smell I have noted, perithecia are 375-575 microns high and stromata are small (only 3-4 cm)
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,
Jacques
Best wishes
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,
Jacques
Enrique