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02-08-2025 12:35

Hymenoscyphus albidus ?
éric ROMERO éric ROMERO

Bonjour tous, J'ai trouvé sur pétiole de Fraxin

02-08-2025 17:21

Pleomassaria protrusa description
Andgelo Mombert Andgelo Mombert

Bonjour,Je recherche la description et la planche

30-07-2025 20:52

apo on Pteridium aquilinum
Bohan Jia

Hi together,  I've been looking posts in AscoFra

30-07-2025 10:12

Asco1 sur crotte de mouton
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous m'aider à

31-07-2025 16:32

Carbophilous discomycete - Anthracobia pseudorehmii?
Andreas Gminder Andreas Gminder

Dear collegues,today I found on a very fresh fire

30-07-2025 18:06

Orbilia dryadum?
Stefan Jakobsson

On a decorticated twig of Alnus incana on moist so

29-07-2025 18:59

Ayuda con esta
Castillo Joseba Castillo Joseba

Me mandan el  material seco de Galicia, España,

28-07-2025 12:34

Capronia
Enrique Rubio Enrique Rubio

Hi to everybody.I would appreciate any ideas about

28-07-2025 04:59

identification?
Richard Droker

Growing on resin (over moss on Tsuga heterophyll)l

13-06-2025 09:41

Aquatic ascomycete.
Josep Torres Josep Torres

Hello.A cerebriform ascomycete sprouting scattered

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Orbilia on Quercus
Juuso Äikäs, 11-02-2020 22:15
These were growing on a thin, fallen branch of Quercus robur in an open, grassy area. The place wasn't particularly moist, no standing or running water nearby. The spores measure 10.5-14.1 x 2.3-2.7 um (water, spore print). Paraphyses variable in shape, most clavate, some cylindrical-spathulate-submoniliform. Some of them had some resin or something on the tips. I've been searching information but haven't found a species that fits this combination. What do you think? 
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Hans-Otto Baral, 11-02-2020 22:22
Hans-Otto Baral
Re : Orbilia on Quercus
Hi Juuso

where have you been seeking for a description? This is an interesting collection, and I am not able to tell you a name which I am happy about. You should try a median section and look for the margin if it is completely without any hair-like outgrowths. The microscopy recalls Orbilia carpoboloides (= Habrostictis rubra), but the substrate would be unusual and especially the margin should be distinctly fringed.

Also please look for contents in the living excipular cells .

Zotto
Juuso Äikäs, 12-02-2020 10:24
Re : Orbilia on Quercus
I'm quite bad at making sections but I tried to do some. The spores of O. carpoboloides would seem to fit quite well both in shape and size. I tried to search for paraphyses with mammiform tips (which would apparently be typical for that species) but didn't find any.
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Hans-Otto Baral, 12-02-2020 10:52
Hans-Otto Baral
Re : Orbilia on Quercus
Indeed this looks like hairs. In the excipular cells and also paraphyses I do not see the SCBs typical of carpoboloides. You are no able to photograph an apothecium at higher resolution in order to see if the margin is smooth or not?

Keep a herbarium specimen, maybe someone is interested.

Zotto
Juuso Äikäs, 12-02-2020 14:06
Re : Orbilia on Quercus
Here's a 40x image taken with my "ad hoc stereo microscope" :).
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Hans-Otto Baral, 12-02-2020 17:30
Hans-Otto Baral
Re : Orbilia on Quercus
Thanks! This clearly excludes O. carpoboloides.
Hans-Otto Baral, 14-02-2020 22:07
Hans-Otto Baral
Re : Orbilia on Quercus
Hi Juuso,

although I do not want to discuss this species in the monograph I would be glad to note the collection data (date, locality, ...). Do you keep a herbarium?

Zotto
Juuso Äikäs, 14-02-2020 22:51
Re : Orbilia on Quercus
I can certainly provide the data (I don't have it at hand at the moment, I can send an email a bit later). I could also post a sample if you'd be interested. I don't have a proper herbarium, just some samples in sealable plastic bags in a drawer.
Hans-Otto Baral, 15-02-2020 09:28
Hans-Otto Baral
Re : Orbilia on Quercus
Thanks. I have actually no time and at present no reson to study it, the finished monograph does not permit any further expansion. Maybe someone else is interested. A sequence would certianly be interesting.
Hans-Otto Baral, 09-11-2020 22:29
Hans-Otto Baral
Re : Orbilia on Quercus
For completion: The sequence that Guy gained just mow falls unmistakably to Orbilia obtusispora, which would fit in the spore characteristics.