
17-04-2025 15:37

Bonjour.Je suis à la recherche de collections (r

17-04-2025 13:23
Jan EcksteinHello,there is an interesting collection of a tiny

16-04-2025 08:53
Hello.An anamorph photographed under holm oaks thi

15-04-2025 15:06

I found this small white disco on decaying deciduo

13-04-2025 22:47
Bonjour, Je sollicite votre avis pour cette colle

15-04-2025 21:39

Dear all,struggeling as every year with the aquati

10-04-2025 10:09

Hi, Found in March on last years stick from Rubus

09-04-2025 19:37

Good afternoon This 1-2 mm Mollisia was growing o

14-04-2025 23:19

Hello, I've microscoped exsiccate of an Otidea wh

14-04-2025 15:11
Lennert GeesGreetings!For my master's dissertation I work on c
Phaeohelotium fagineum ?
Thierry Blondelle,
04-06-2024 21:26

Je vous soumets cette récolte sur faîne (cupules of Fagus) que j'ai déterminée comme étant Paeohelotium fagineum d'après la clé de Declercq (est-ce la dernier version pour les Hymenoscyphus ?)
J'ai tout de même quelques interrogations sur mon interprétation de la micro:
- Je distingue 3 couches succesives sous-hyméniales (une couche d'excipulum hymenial de type intricata, une couche intermédiaire de type porrecta, une couche d'excipulum ectal basale de type globulosa-angularis.
- Un OCI voisin de 2 plutôt que de 0-1
- des spores à 1-2 cellules. Est-ce un critère récurrent ?
Mes observations sont-elles suffisantes et confirment-elles l'espèce ?
Merci pour vos avis.
Salutations
Thierry
Hans-Otto Baral,
04-06-2024 23:14

Re : Phaeohelotium fagineum ?
P. fagineum is a species with a short stout stipe. The living paraphyses do not contain VBs in your case which excludes a lot of Hymenoscyphi. Important would be to clarfy whether the spores are ejected when non-septate or when septate. If you find living mature asci you will see that. Also iodine reaction and croziers are required.
Thierry Blondelle,
05-06-2024 07:28

Re : Phaeohelotium fagineum ?
Thanks Zotto for these new ways of research.
Thierry Blondelle,
05-06-2024 23:12
Hans-Otto Baral,
06-06-2024 08:50

Re : Phaeohelotium fagineum ?
The apical ring looks Hymenoscyphus-like, but that type occurs also elsewhere. I see no living asci, we cannot be sure about the expulsion. And for croziers I am similarly uncertain, one needs the cel below, unruptured from the ascus.
My first idea was H. varicosporoides, but I remembered that species only with a short stalk. Now when looking in my folder there are several with long stalks (e.g. 18.II.2015, J. Balda). Also the original description refers to a long-stalked fungus. So I think this is a good option. The fungus has an interesting anamorph adapted to running or standing water.
Thierry Blondelle,
06-06-2024 13:52

Re : Phaeohelotium fagineum ?
Thanks a lot. The fungus rised on beechnuts fallen to the edge of a little stream. This confirm it is a species of damp places.
I am going to try another micros. How to identify living asci ?
I am going to try another micros. How to identify living asci ?
Hans-Otto Baral,
06-06-2024 17:17

Re : Phaeohelotium fagineum ?
Well, sorry, I wrote this 100x in this forum. Please go to my old homepage, the front page illustrates without words.