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13-12-2019 20:42

Götz Palfner Götz Palfner

Bonjour tous,Sorry, but as my French is crap, I wi

14-12-2019 10:09

Marc Detollenaere Marc Detollenaere

Dear forum,   On a decorticated trunk of Populu

11-12-2019 22:21

BERNARD CLESSE BERNARD CLESSE

Bonsoir à toutes et tous,Pourriez-vous me confirm

11-12-2019 23:29

Juuso Äikäs

I found these in a Picea abies dominated forest in

08-12-2019 11:01

Gilbert MOYNE

Bonjour, Un petit champignon que m'a remis Andgel

13-12-2019 16:20

Chris Yeates Chris Yeates

Bonjour tous this is an area I feel rather ignora

12-12-2019 23:42

Maren Kamke Maren Kamke

Hello together, can someone provide me with this

12-12-2019 18:36

Roland Labbé

Bonjours ! Voici un Trichoderma (Hypocrea) inconn

07-12-2019 22:22

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos. Subo unas fotos de un asco que hemo

11-12-2019 23:25

Ethan Crenson

Hello all,This was found by a friend in New York C

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Asco on Potentilla erecta leaves
Enrique Rubio, 26-05-2009 19:35
Enrique RubioHi to all:
What's tour opinion about this small (up to 0.3 mm) ascomata, turbinate, witish, later yellowish brown, and finally greyish- blue by the existence of an exudate blueish?. I think could be a Calycellina species unknow for me.
They grew on overwintered leaves of Potentilla erecta.
Many thanks!
  • message #7945
Enrique Rubio, 26-05-2009 19:37
Enrique Rubio
Re:Asco on Potentilla erecta leaves
Spores.
They have a gel seath, are 2-guttulate and they have some little polar guttules
  • message #7946
Enrique Rubio, 26-05-2009 19:39
Enrique Rubio
Re:Asco on Potentilla erecta leaves
Asci IKI bb, with croziers, 8-spored, claviform. Paraphyses with clearly Vb's.
  • message #7947
Enrique Rubio, 26-05-2009 19:40
Enrique Rubio
Re:Asco on Potentilla erecta leaves
Hyphae of the apothecial margin have Vb's too
  • message #7948
Enrique Rubio, 26-05-2009 19:43
Enrique Rubio
Re:Asco on Potentilla erecta leaves
Hymenium at 400 x
  • message #7949
Enrique Rubio, 26-05-2009 19:43
Enrique Rubio
Re:Asco on Potentilla erecta leaves
Context textura angularis to prismatica
  • message #7950
Enrique Rubio, 26-05-2009 19:44
Enrique Rubio
Re:Asco on Potentilla erecta leaves
More context images
  • message #7951
Enrique Rubio, 26-05-2009 19:47
Enrique Rubio
Re:Asco on Potentilla erecta leaves
Blueish exudate seems to invade the texture of older ascomata and it does them to take greyish-blue hues.
Enrique Rubio, 26-05-2009 19:48
Enrique Rubio
Re:Asco on Potentilla erecta leaves
Images of exudate
  • message #7953
Hans-Otto Baral, 26-05-2009 21:51
Hans-Otto Baral
Re:Asco on Potentilla erecta leaves
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
  • message #7957
Enrique Rubio, 27-05-2009 11:20
Enrique Rubio
Re:Asco on Potentilla erecta leaves
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
Hans-Otto Baral, 27-05-2009 21:35
Hans-Otto Baral
Re:Asco on Potentilla erecta leaves
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
Enrique Rubio, 28-05-2009 20:25
Enrique Rubio
Re:Asco on Potentilla erecta leaves
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
Hans-Otto Baral, 28-05-2009 21:51
Hans-Otto Baral
Re:Asco on Potentilla erecta leaves
No problem!

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

Zotto