Spores.
They have a gel seath, are 2-guttulate and they have some little polar guttules

Asci IKI bb, with croziers, 8-spored, claviform. Paraphyses with clearly Vb's.

Hyphae of the apothecial margin have Vb's too

Hymenium at 400 x

Context textura angularis to prismatica

More context images

Blueish exudate seems to invade the texture of older ascomata and it does them to take greyish-blue hues.

Images of exudate

Hi Enrique

wonderful! This reminds me of an unsolved find I made on an unidentified plant (?Cyperaceae) in the subalpine Pinus mugo vegetation (the drawing is also on the DVD, in dir. Calycellina). Now with your substrate it might be possible to identify this, in case it is host-specific.
In my database I see a Naeviopsis artcica on Potentilla leaves: spores 11-18 x 5-6 (too big), also asci inamyloid.
Even when I search for Rosaceae leaves I find nothing. A Psilocistella alchemillae with spores 9.5-12 x 4-4.5 µm (Raitviir 2003) would probably hardly fit.

Sorry, no idea. I also think it is a Calycellina. But I did not note any bluish tint in my find.
If you wish you can send me your images in a somewhat higher resolution (1.5-2x). Was it also at high altitude?
Zotto

Hi Zotto. I already had seen your drawings of HB 5850b, but I think that the distribution of polar guttules is very different. Those of my collection seem to be constant and very peculiars, not as that you show in your drawings.
By the other hand, Psilocistella alchemillae is in Raitviir's description (2004) a IKI and Mlz. (-) species.
Our collection was made at 650 m of altitude.
I send you my images at bigger resolution and many thanks again.
Enrique

Hi Enrique

it is good that you pay so much attention to guttules! You may be right, they are often very constant, but sometimes the next collection deviates a bit, and is anyhow the same species. But in my case I think the substrate must be very different (I noted the stem to be triangular), so most probably a monocot. On the leaf there was also a ?Moellerodiscus.

This is one of many collections where I did not have enough time for a thorough study (and no camera yet). Too many finds to study at one day. When I had read the Raitviir paper on Greenland ascos, I compared my find with Psilocistella macrospora. That species is treated after P. alchemillae, and is IKI deep blue. However, I did not see any haírs.

Raitviirs comment to alchemillae reads "IKI and MLZ not blue". This is a strange phrase. Better would have been "negative" because IKI-red is also not blue.

I feel Raitviir's taxa must be recollected from similar habitats in order to clarify their generic relation. We have no info on the paraphysis and hair contents, particularly. His comments on ascus croziers are also not fully trustworthy. If he was right then the two Psilocistellas differ by simple septate asci.

Zotto

Hi, Zotto:
I understand that your time is valuable, and I do not want to overload you of work. I understand perfectly that you cannot have seen all the fungi that our we show. I asked you about this fungus because its habitat and aspect are very peculiars.
By the other hand, I think you are right.:Raitviir's descriptions are not very satisfactory in many aspects.
Many thanks
Enrique

No problem!

Calycellina is one of the many genera that need monographic revision. Surely there are many un- or badly described species.

Zotto