12-03-2023 10:11
Thierry Blondelle
Hello !I'm a new member from France.I require your
12-03-2023 00:13
Alex Akulov
Dear colleaguesI need your advise about fimicolous
10-03-2023 21:20
Rubén Martínez-Gil
Hola a todos.Subo unas fotos de un asco que encont
11-03-2023 22:04
Lothar Krieglsteiner
.. this one we found repeatedly in the Algarve, he
06-03-2023 21:28
Lothar Krieglsteiner
... found in the Algarve, near Sao Bartolomeu Mess
10-03-2023 23:17
Dirk GerstnerHallo alle, Ich fand diese Orbilia an toten, bell
10-03-2023 13:17
carl van den broeck
Dear forumOn the west coast in Flanders (B) we fou
08-03-2023 23:06
Marc Detollenaere
Dear Forum,On Fraxinus I found some elongated blac
Hypoxylon petriniae ?
Thierry Blondelle,
12-03-2023 10:11
Hello !I'm a new member from France.
I require your advise for this sample of Hypoxylon found on a dead branch of Fraxinus.
I think to H. petriniae with these inconspicuous perithecal mouds.
Ascospores: 12-10 x 4-5 µm with double guttula in most of them.
Thanks
Thierry Blondelle
Lothar Krieglsteiner,
12-03-2023 10:21
Re : Hypoxylon petriniae ?
Hello Thierry,
can you tell us which color the pigment extracted with 10% KOH has?
Yours, Lothar
can you tell us which color the pigment extracted with 10% KOH has?
Yours, Lothar
Thierry Blondelle,
12-03-2023 10:39
Re : Hypoxylon petriniae ?
Hello Lothar,
Pigment seems to be orange.
Pigment seems to be orange.
Jacques Fournier,
12-03-2023 15:53
Re : Hypoxylon petriniae ?
Hi Thierry,
you are likely right, but H. petriniae may be highly variable in colour and external appearence, making its identification sometimes challenging.
A good discriminating character from other species with orange pigments is the relatively weak thickness of the stromata, rarely over 0.5 mm thick, combined ith the small diameter of perithecia, mostly 0.3-0.4 mm diam.
Cheers,
Jacques
you are likely right, but H. petriniae may be highly variable in colour and external appearence, making its identification sometimes challenging.
A good discriminating character from other species with orange pigments is the relatively weak thickness of the stromata, rarely over 0.5 mm thick, combined ith the small diameter of perithecia, mostly 0.3-0.4 mm diam.
Cheers,
Jacques
Thierry Blondelle,
12-03-2023 18:06
Re : Hypoxylon petriniae ?
Thanks Jacques for these additionnal informations.