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Ombrophiloid fungus on peat-bog soil
Enrique Rubio, 21-07-2012 14:09
Enrique RubioHi to everybody:
Yesterday we have seen this lenticular to pulvinate totally whitish ascomata up to 5-6 mm in diam. that grows on Eriophorum angustifolium old leaves (and ericaceous host too) on very wet acid soil.
The ascomata are sessile on a very broad base and they are glabrous.


The medullary excipulum has a loose textura intricata without crystals that becomes very gelified at the cortex. I think the asci are IKI negative (or very faintly positive?). Croziers positive. The spores have a faintly gel sheath around them.
I think is not an Hymenoscyphus species but I don't know a good genus for it
What's your opinion?  
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Uwe Lindemann, 21-07-2012 14:15
Uwe Lindemann
Re : Ombrophiloid fungus on peat-bog soil
What about the Genus Cudoniella? That would be my first guess...
Best, Uwe
Hans-Otto Baral, 21-07-2012 16:35
Hans-Otto Baral
Re : Ombrophiloid fungus on peat-bog soil
Strange thing! The gelified ectal excipulum of very narrow hyphae and the eguttulate paraphyses exclude Cudoniella in my opinion, though other characters resemble it when taken in a wider sens. Ombrophila is a choice, but I never saw such an excipulum. O. pileata has also the medulla strongly gelatnious with arrow hyphae, and the spores are much narrower.

No idea.

Zotto
Enrique Rubio, 21-07-2012 16:51
Enrique Rubio
Re : Ombrophiloid fungus on peat-bog soil
Many thanks to Uwe and Zotto.

I will wait to my next life for to know his name
Raúl Tena Lahoz, 21-07-2012 17:03
Raúl Tena Lahoz
Re : Ombrophiloid fungus on peat-bog soil
Pezoloma? Saludos
Enrique Rubio, 21-07-2012 17:42
Enrique Rubio
Re : Ombrophiloid fungus on peat-bog soil
Hi Raúl
I have considered this possibility but I don't know well this genus and in García & Van Vooren's keys i don't see 'my fungus'
Enrique
Hans-Otto Baral, 22-07-2012 09:48
Hans-Otto Baral
Re : Ombrophiloid fungus on peat-bog soil
Pezoloma is a good idea, but it is heterogeneous (includea Cudoniella species such as imberbis/kathiae).

The distribution of gel would quite well fit Pezoloma, yes. And the occurrence in a bog with Ericaceae also.

A quite distinct t. prismatica or t. globulosa is seen in section of P. marchantiae and P. ciliifera. This +/- thick layer delimits the outer gel layer and the inner t. intricata.  I completely miss such a layer in Enrique's specimen.

Zotto
Enrique Rubio, 22-07-2012 11:53
Enrique Rubio
Re : Ombrophiloid fungus on peat-bog soil
Zotto and Raúl
I have seen any textura prismatica or globulosa in the excipulum, that is made of cylindrical or slightly inflated elements

Enrique
Hans-Otto Baral, 22-07-2012 12:02
Hans-Otto Baral
Re : Ombrophiloid fungus on peat-bog soil
Yes, I see on your pics a hyphoid medulla of loose upwards oriented elongate cells, and an intricata of narrow hyphae towards the excetrior, where it changes to a very loose covering layer with ample gel between the narrow hyphae. That covering layer is typical of Pezoloma, but inside this layer there are large cells in Pezoloma.

That these inflated cells are not really globulose but mainly also elongate and intricata-like is seen on the attached images. of P. ciliifera. So i think there is no strong difference to your species, and the genus Pezoloma quite probable.

Zotto
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Enrique Rubio, 22-07-2012 13:54
Enrique Rubio
Re : Ombrophiloid fungus on peat-bog soil
In fact Pezoloma ciliifera grows at the same place together with 'my fungus'. But I think the excipulum is quite different without rounded or polygonal cells.
By the other hand I have seen inmature ascus IKI red in Pezoloma ciliifera as you show in HB-3074. Mature asci seems to have ascus IKI negative?
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Hans-Otto Baral, 22-07-2012 15:31
Hans-Otto Baral
Re : Ombrophiloid fungus on peat-bog soil
I think the IKI-reaction is variable rather than dependent on maturity. In 8927b I saw it also mature (photo, not very clear), and in 2344 I wrote very faint or almost negative.

Zotto
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Enrique Rubio, 22-07-2012 21:11
Enrique Rubio
Re : Ombrophiloid fungus on peat-bog soil
Thanks!
Guy Garcia, 24-07-2012 13:22
Re : Ombrophiloid fungus on peat-bog soil
Bonjour Enrique, bonjours à tous,

J'ai plusieurs récoltes d'un champignon sans nom (publication en attente avec Zotto) qui me semble proche si ne n'est semblable au tien, mais avec une taille de spores plus courte. En voici la description et une photo macro.
Qu'en penses-tu ? 

GG06073002, GG06081303

Le 30-07-2006, Fraisse-sur-Agout, Col de La Bane, saulaie
tourbo-fangeuse en bord de ruisseau (après les méandres). Sur feuilles, débris
herbacés et algues collés à la terre dans une cuvette exondée.


Plusieurs apothécies, entièrement blanches, sessiles, à
marge concolore à peine différenciée au début (un peu enroulée), hyménium plat
puis un peu bombé. Diamètre 2 à 5 mm, de forme circulaire ou plus ou moins
déformé. Généralement en troupe de 4-5 spécimens mais isolés.


Flancs et marge finement villeux sous la bino.


Paraphyses nombreuses, droites, régulièrement linéaires,
1,5-2 µm de diamètre, à sommet non élargi et arrondi, multiseptées, sans
guttules réfringeantes, non exertes, formant un épithécium et ramifiées à la
base.


Asques cylindriques, rarement légèrement clavés dans la
partie haute, octospores (rarement tétraspores), IKI et Melzer négatifs,
pleurorynches (mais pas évident sur certains asques), 70-100 x 8-10-12 µm. Pars
sporifera 35-40 µm.


Sous-hyménium de textura angularis sur 3-4 rangées de
cellules superposées prismatiques.


Spores hyalines, lisses, non cloisonnées dans l'asque
(parfois un septum médian en fin de maturité hors de l'asque), contenu huileux
3-4(5), elliptiques, un peu courbées sur une face, avec un sommet légèrement apointi,
12-17 x 4-5 µm.


Poils courts, à sommet clavé
terminant un empilement de plusieurs petites cellules angulo-prismatiques.


Chair à tendance epidermoidea
constituée de cellules, parfois assez grandes, en forme de grosse saucisse. A
la base de l'apothécie, de fines hyphes cylindriques de texture intricata, à
peine gélifiées, adhèrent aux algues ou autres débris herbacés. Aucune réaction
au réactif de Melzer.


Pas de cristaux.


Commentaires : Me semble proche du genre Pezoloma !


Retrouvé au même emplacement le 05-08-2007, une dizaine
d'exemplaires. Sur cette récolte, les asques arrivent jusqu'à 125 µm de long et
l'insensibilité aux réactifs iodés est confirmée même après un passage à la
potasse. Récolte conservée sous GG07080503. Photos macro et micro.

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Hans-Otto Baral, 24-07-2012 16:57
Hans-Otto Baral
Re : Ombrophiloid fungus on peat-bog soil
Dear Guy

could well be the same. Looking forward for seeing microphotos

Zotto
Enrique Rubio, 24-07-2012 17:58
Enrique Rubio
Re : Ombrophiloid fungus on peat-bog soil
Dear Guy:
Can you send us your microphotos?

Enrique
Guy Garcia, 24-07-2012 20:57
Re : Ombrophiloid fungus on peat-bog soil
Oui voilà quelques photos
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Hans-Otto Baral, 24-07-2012 21:19
Hans-Otto Baral
Re : Ombrophiloid fungus on peat-bog soil
Yes I agree, looks very similar!

I suppose that the margin is characteristic, protruding, rather thick, of wide clavate cortical elelements.

And yes, I now realize that HB 5579 is probably the same fungus.


Zotto
Guy Garcia, 24-07-2012 21:49
Re : Ombrophiloid fungus on peat-bog soil
Yes here others photos of the elements of the margin and ectal excipulum
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Hans-Otto Baral, 24-07-2012 21:54
Hans-Otto Baral
Re : Ombrophiloid fungus on peat-bog soil
Good! Difficult to locate such a species in the literature, with no apparent binding to a special substrate.
Enrique Rubio, 25-07-2012 13:18
Enrique Rubio
Re : Ombrophiloid fungus on peat-bog soil
I think coul be the same fungus. The next week end I will go to the place for to try study better the apothecial margin