23-09-2025 13:31
Thomas Læssøehttps://svampe.databasen.org/observations/10534623
15-10-2025 16:39
Edvin Johannesen
These tiny (0.2-0.6 mm), white, pulvinate apotheci
03-10-2025 13:44
Riet van Oosten
Hello, Found by Laurens van der Linde on Populus
13-10-2025 19:05
Louis DENYBonjour forumSur tronc décortiqué de feuillu x,
11-10-2025 20:27
Marcel Heyligen
Found on a barked branch, 14 mm in diameter, of Ro
09-10-2025 22:14
S. RebeccaWe just had the Bavarian Mycology Conference in Au
10-10-2025 00:49
Ethan CrensonHello all, This was found last weekend on a hardw
Hypoxylon rubiginosum?
Enrique Rubio,
18-07-2011 18:55
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?
Enrique Rubio,
18-07-2011 19:43
Re : Hypoxylon rubiginosum?
Dear René:
No smell I have noted, perithecia are 375-575 microns high and stromata are small (only 3-4 cm)
Enrique
No smell I have noted, perithecia are 375-575 microns high and stromata are small (only 3-4 cm)
Enrique
Jacques Fournier,
18-07-2011 20:59
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,
Jacques
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
Enrique Rubio,
19-07-2011 12:13
Re : Hypoxylon rubiginosum?
OK., Jacques. I will send you my material
Best wishes
Enrique
Best wishes
Enrique
Jacques Fournier,
28-09-2011 10:44
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,
Jacques
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 Rubio,
28-09-2011 12:31
Re : Hypoxylon rubiginosum?
Many thanks for your study, Jacques
Enrique
Enrique