![](/images/nonlu.png)
19-07-2024 11:08
![Miguel Ãngel Ribes](/uploads/user_vgn/Ribes-0001.jpg)
Good morningThis Scutellinia from July 9 grew at 1
![](/images/nonlu.png)
16-07-2024 18:32
![Andgelo Mombert](/uploads/user_vgn/Mombert-0001.jpg)
Bonsoir, Un discomycète sur Liochlaena lanceolat
![](/images/nonlu.png)
17-07-2024 16:29
![Andgelo Mombert](/uploads/user_vgn/Mombert-0001.jpg)
Hello,A colleague found an unknown fungus on the s
![](/images/nonlu.png)
11-01-2022 16:36
Hi does anyone have a digital copy of Raitviir A (
Hypoxylon petriniae ?
Thierry Blondelle,
12-03-2023 10:11
![Thierry Blondelle](/uploads/user_vgn/-0211.jpg)
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
![Lothar Krieglsteiner](/uploads/user_vgn/Krieglsteiner-0001.jpg)
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
Jacques Fournier,
12-03-2023 15:53
![Jacques Fournier](/uploads/user_vgn/Fournier-0001.jpg)
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
![Thierry Blondelle](/uploads/user_vgn/-0211.jpg)
Re : Hypoxylon petriniae ?
Thanks Jacques for these additionnal informations.