15-02-2026 04:32
Tomaz Vucko
One more specimen that is giving me some descent a
17-02-2026 17:26
Nicolas Suberbielle
Bonjour à tous, Je recherche cette publication :
08-12-2025 17:37
Lothar Krieglsteiner
20.6.25, on branch of Abies infected and thickened
17-02-2026 13:41
Isabelle CharissouBonjour, est-ce que quelqu'un pourrait me fournir
16-02-2026 18:34
Thierry Blondelle
Bonjour,La micro de cet anamorphe de Hercospora su
16-02-2026 21:25
Andreas Millinger
Good evening,failed to find an idea for this fungu
16-02-2026 17:14
Joanne TaylorLast week we published the following paper where w
16-02-2026 16:53
Isabelle CharissouBonjour, quelqu'un pourrait-il me transmettre un
Hello Everyone,
I would appreciate some help with a delightful minute species of probably Calycellina.Found in abundance on decaying leaves of Alnus glutinosa from a very wet location in North Argyll.Apothecia very small, ranging from 100µm to about 1 mm. brown . Sessile with a marked basal ring of dark cells. Excipular structure of thin-walled rounded cells, almost 'prismatica' Apothecium surrounded be a very variable fringe of delicate hairs, mostly very short, occasionally clearly visible as ion the photo. Asci with pore that is Iodine +ve, Spores narrowly elliptical about 8 x 3. Paraphyses slender. Hairs, paraphyses and spores mostly without inclusions. Pictures taken from fresh material in water.
Apologies fro the lack of scale bars: at the time the measurement system was not functioning.
Reagrds to all, Peter Wilberforce
do you also have a photo of the more basal excipulum? The absence of elongate VBs in the paraphyses and hairs excludes a Calycellina. My idea on this substrate is Pyrenopeziza betulina (on Betula leaves) or the similar P. fuckelii (= Microscypha monticola) on Salix leaves.
But I might be wrong ....
Alnus is certain?
Zotto
Dear Zotto,
Many thanks for commenting on this unusual species. There is no doubt at all about the identitiy of the host leaves: Alnus glutinosa. The location is a very wet and midge-ridden area in a narrow glen alongside a stream.
I tried at the time to get sections, but found the apothecia very fragile. This was using a freezing stage. I have quite a bit of dried material, I'll try soaking a bit up and try sections again.
The hairs were generally very short and only visible under a stereo mic. The picture shows a most unusual long-haired sprecimen. In all cases the hairs seem to be 2-celled: a basal squat cell and an apical elongated finger-like cell. Always hyaline with few inclusions.
Thanks for trying to help with this interesting fungus.
In a few weeks time Ill try and collect more material.
Very kind regards,
Peter W