21-12-2025 09:32
Josep Torres
Hello.A tiny ascomycete found embedded in wood in
21-12-2025 21:32
Pol DebaenstHello, Garden, Burgweg 19, Veurne, BelgiumOn 10/1
22-12-2025 23:38
Patrice TANCHAUDBonsoir, récolte sur un mur en pierre, apothéci
22-12-2025 00:47
Patrice TANCHAUDBonsoir, récolte à proximité du milieu dunaire
21-12-2025 21:40
Isabelle CharissouBonjour, j'aimerais connaitre les références de
20-12-2025 23:08
Patrice TANCHAUDBonsoir, récolte sur sol sablonneux dans l'arriÃ
Bonjour à tous,
Voici une récolte d'hélotiale sur feuilles de bouleau en zone de tourbière pour laquelle je ne trouve pas d'identité. Merci de vos remarques. Â
Here is an ombrophiloid helotiale  collection on Betula leaves in peat-bogs . Any help will be appreciated
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Apos : up to 0.5 cm, nearly translucent white at first , then greyish , rather fleshy , wrapped in a gelatinous gangue at first.
Ascus 105-115 (125) x 9-10,5, IKI -, H+, Spores 9,5-11,5 (13) x 4,5-5
Paraphyses x 2µm with few small VBs
No cristals seen
Ombrophila translucent would suit the substrate but doesn't match several major caracters such as IKI negative reaction.
Amitiés. Michel
I don't have an idea... "Mollisia" spectabilis seems excluded too.
Zotto
Bien que la longueur sporale moins longue, ta collection doit être proche des récoltes citées sur ce même forum à ce lien
http://www.ascofrance.fr/search_forum/19272
Amitiés, Guy
 Je viens de faire une recherche dans la révision des British Helotiaceae de Dennis et je trouve page 164 dans le texte concernant Ombrophila obstricta mention de O. umbonata (Pers.) Karst. avec des spores de la dimension qui correspondent 7-12 x 3-5 µm
Ombrophila umbonata (Pers.) P. Karst., Bidr. Känn. Finl. Nat. Folk 19: 89 (1871) f. umbonata, dont le nom actuel serait Niptera umbonata (Pers.) Fuckel, Jb. nassau. Ver. Naturk. 23-24: 292 (1870) [1869-70] (Index Fungorum)
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Je viens de trouver ceci: http://ascofrance.fr/forum/24425/une-idee
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Pezoloma ou Ombrophila obstricta
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Amitiés
Brigitte
I am not sure if Michel's apothecia have that thick external gel layer of thin hyphae on the excipulum? O your section, Michel., I am not sure. it should be obvious, at least at the lower flanks.
Zotto
Quel magnifique forum que cet Ascofrance ! Merci à chacun d'entre vous pour vos réponses Â
My fungus was collected at 30 km from Jean Louis Jalla's collecting site(http://ascofrance.fr/forum/24425/une-idee) and on the very same substrate (I found it in two sites actually and each time on Betula leaves ). It is noticeable that I also found larger spores in more mature apos (11-13 µm long versus 9,5-10,5 in others and both ''types'' with free (thus mature) spores measurements)  Â
Yes Zotto, as seen on macro pics, a gel sheath wrapps the fresh apos , it leaves a thin membrane also on the hymenium , coloured in CRB . I admit it's not so readable on the section pic .
AMitiés Michel
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Hymenium-in-CRB-0001.jpg
So when this fungus might be restricted to Betula leaves then I am sure the following sample by Ruben Martinez Gil is also the same:
http://www.ascofrance.fr/forum?page=136
Spores of 10.5 to 13.5 x 4.5-5.5 microns fit very well, and his images show that they may but must nt contain a bigger drop at each end.
I would very much like you to send a portion of this sample for sequencing to Danny Haelewaters in Massachusetts. He might presently be on holidays as I got no response in another matter. I will tell you when he is back.
Zotto
Yes Zotto, good idea.
Ruben's post on Ascofrance  is http://www.ascofrance.fr/search_forum/29832
It would also be useful to compare with Enrique's find which I think different (spores much longer and differently shaped ) and Guy Garcia's which I think closer .
Amitiés
Michel
Guy Garcia's find on soil with rootlets (VII.2012) has spores with the bigger oil drops away from the poles, perhaps this has some meaning. Also spores are larger.
Enrique's sample Pezoloma, 20.VII.2012-1.jpg has much too long spores.