12-06-2026 14:50
François Freléchoux
Bonjour, Voici la brève description d'une Mollis
10-06-2026 21:16
François Freléchoux
Bonsoir,Le dernier du jour, en attendant votre avi
11-06-2026 19:01
William Slosse
Hello all,In an attempt to make a culture of a sus
11-06-2026 19:03
Nicolas VAN VOOREN
Chers membres d'Ascofrance,Le site sera placé en
10-06-2026 23:08
éric ROMERO
Bonjour tous, Je vous propose un Mollisia trouvé
09-06-2026 18:32
Camille MertensSur morceau de roseau immergé 0,5 - 0,7 mm de dia
10-06-2026 12:54
Steve ClementsBonjour encore, Pouvez-vous m'aider, s'il vous pl
10-06-2026 21:07
François Freléchoux
Toutes les tiges de gentianes jaunes de l'an passÃ
10-06-2026 13:41
François Freléchoux
Bonjour à nouveau, Voici une trouvaille d'hier.
Phaeohelotium fagineum ?
Thierry Blondelle,
04-06-2024 21:26
Bonjour,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
Re : Phaeohelotium fagineum ?
Here are new élements of observation
- Spores are two-cells septated in both living asci and after expulsion.
- IKI+on asci
- For the croziers, i'm not sure. To confirm on the picture.
Can we always consider Hymenoscyphi ?
- Spores are two-cells septated in both living asci and after expulsion.
- IKI+on asci
- For the croziers, i'm not sure. To confirm on the picture.
Can we always consider Hymenoscyphi ?
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.