Accès membres

Mot de passe perdu? S'inscrire

13-08-2020 19:44

Lothar Krieglsteiner Lothar Krieglsteiner

... last week in the Eifel (Germany). It looks mac

13-08-2020 21:47

Andgelo Mombert Andgelo Mombert

Bonsoir, Sur tige morte d'une plante suffrutescen

13-08-2020 21:33

Andgelo Mombert Andgelo Mombert

Bonsoir, Sur tige morte de Dryas octopetala, vers

13-08-2020 19:22

Pavol Palo

Hello friends, may I ask you for help ? I would n

09-08-2020 07:55

Lothar Krieglsteiner Lothar Krieglsteiner

... maybe Molinia, in an acid bog (near Narthecium

15-02-2018 08:09

BERNARD CLESSE BERNARD CLESSE

Sur tige morte de renouée du Japon.Aucune idée

09-07-2020 00:39

Valencia Lopez Francisco Javier

Hola a todosEncontré este curioso ascomycete a me

08-08-2020 20:54

Antonio Couceiro

Ascoma de 5cm, creciendo entre raices de Prunus la

09-08-2020 22:18

Lothar Krieglsteiner Lothar Krieglsteiner

... the spores of this find (today, in the Eifel,

09-08-2020 15:33

Eduard Osieck

Can somebody provide a copy of GÖRKE, C. & H

« < 1 2 3 4 5 > »
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