08-12-2025 17:37
Lothar Krieglsteiner
20.6.25, on branch of Abies infected and thickened
16-01-2026 00:45
Ethan CrensonHi all, On decorticated hardwood from a New York
10-01-2026 20:00
Tom SchrierHi all,We found picnidia on Protoparmeliopsis mur
13-01-2026 07:28
Danny Newman
Chlorociboria glauca on indet. decorticate logThe
15-01-2026 15:55
Lothar Krieglsteiner
this one is especially interesting for me because
13-01-2026 08:43
Danny Newman
Tricladium varicosporioides on indet. decorticate
07-01-2026 22:22
Danny Newman
Tatraea sp. on indet. hardwood The Swag, Great Sm
Red perithecia
Lepista Zacarias,
31-01-2020 22:16
I would like to know more about the fungus living on a young oak tree, which is dying. The bark of the tree is covered with black spot that here and there become redish, corresponding to the perithecia seen in the photos.
Measurements:
Asci ~230 x 20 µm
Spores 12-13 x 6 µm, hyaline, 1-septate
there eere also some big brown spores inside the perithecia with 25-35 x 20 µm
Thanks in advance,
zaca
Andreas Gminder,
01-02-2020 11:40
Re : Red perithecia
Hello,
a (decaying) species of Nectria sensu lato in my opinion.
best,
Andreas
a (decaying) species of Nectria sensu lato in my opinion.
best,
Andreas
Christian Lechat,
01-02-2020 11:56
Re : Red perithecia
Hi to all,
yes, Andreas is right, but the identity of the host fungus is essential to guide the research.
All the best,
Christian
Simon Kennedy,
01-02-2020 11:59
Re : Red perithecia
I agree, Andreas. The first thing that might narrow things down a bit, would be to identify the black stromatic material on which the Nectriaceous entiity sits and then look for an appropriate fungicolous species amongst the Nectriaceae. It would be helpful, indeed, to see if there are any mature asci in that black crust. Best of Luck,
Simon
Lepista Zacarias,
01-02-2020 18:10
Re : Red perithecia
My dears Andreas, Christian and Simon,
Thanks for your comments; That's the magic of AscoFrance: You can be lost, but you are not alone.
As I said I think that the host tree is a young oak tree; I will try to confirm that in situ. Meanwhile, I will try to find something on the black crust.
Kind Regards,
zaca
Thanks for your comments; That's the magic of AscoFrance: You can be lost, but you are not alone.
As I said I think that the host tree is a young oak tree; I will try to confirm that in situ. Meanwhile, I will try to find something on the black crust.
Kind Regards,
zaca