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09-07-2020 00:39

Valencia Lopez Francisco Javier

Hola a todosEncontré este curioso ascomycete a me

08-07-2020 19:01

Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonjour.Je ne remets plus la main sur mon tiré-à

08-07-2020 20:29

Juuso Äikäs

These were growing on a dead grass stalk in a fore

08-07-2020 16:47

Chris Yeates Chris Yeates

Bonjour tous While searching for the downy mildew

08-07-2020 18:21

Castillo Joseba Castillo Joseba

me mandan el material seco recolectado en mdera si

08-07-2020 10:59

Joanne Taylor

Hi there,Does anyone have a copy of the following

07-07-2020 21:07

Lieve Deceuninck Lieve Deceuninck

Dear members of this forumCould this find be Cheil

08-07-2020 16:41

Thomas Læssøe

Suggestions on this one would be very welcomesee:

06-07-2020 17:11

Thomas Læssøe

see: https://svampe.databasen.org/observations/10

02-04-2007 01:16

Patrice TANCHAUD

Bonsoir, Si on prend "Nordic Macromycètes" (tom

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A bright colour Alpine Helotiale
Michel Hairaud, 07-01-2014 23:04
Michel HairaudBonjour à tous, Hi to all. 

This tiny bright yellow disco was discovered in an Alpine zone on previous year's Cirsium stems lying on ground. I had already seen it in French Alps several times long ago but I must admit I still cannot give an name to it. Any help will be welcome. 

J'ai récolté ce petit disco cet été en zone alpine sur vieilles tiges de Cirsium au sol . C'est une espèce que j'ai déjà rencontrée dans les Alpes françaises il y a longtemps mais ne sais toujours pas comment le nommer. Merci de votre aide.

Apothécies sessiles, jaune d'or, à marge méchulée , < 0,4 mm
Le pigment jaune contenu dans les poils réagit fugacement en rouge vif à KOH

Asques H+, IKI + Bleun Calycina type. 65-70 x (6)8-9 µm PS 28-30
Spores 13,5-16 x 2,5-3 , cylindriques , légèrement courbes OCI 0,5 , parfois 1 septa 
Poils de marge llisses, fascilulés en mèches  --> 70µm , dernier article 35 µm x 3,5-4,5 Vacuoles réfringentes homogènes jaune d'or 
Paraphyses droites, apex  parfois subconiques, VBs jaune 
EE globulosa angularis évoluant vers prismatica vers l'extérieur où les cellules contiennent des vacuoles comme dans les poils. CRB - 


Amitiés

Michel

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Hans-Otto Baral, 08-01-2014 18:10
Hans-Otto Baral
Re : A bright colour Alpine Helotiale
Hi Michel
did you test  image 6 with NH4OH?

The fungus reminds me of Psilachnum rubrotinctum and ERD 5740 (Tilia bark), but those have much smaller spores.

I have no idea otherwise.

Zotto
Michel Hairaud, 08-01-2014 18:52
Michel Hairaud
Re : A bright colour Alpine Helotiale
Hi zotto, 
Thank you for your interest for this post.

I have in memory P. rubrotinctum found by the Master of Asturiana (Enrique)! I think it was also collected during last year Somiedo congress .  This fungus is first white and gets the very same colour as mine with NH4OH
I did not test NH4OH and the colour you see here is natural. The red violent reaction was  produced by KOH 5% and lasts a few seconds 
Besides, as you notice, spores are quite different . Paraphyses might belong to Psilachnum as shown on the fllowing picture. I am not sure . I first thought of Calycellina but the CRB reaction in vacuoles does not match, neither the spore envelop .

Amitiés
Michel
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Hans-Otto Baral, 08-01-2014 20:27
Hans-Otto Baral
Re : A bright colour Alpine Helotiale
Psilachnum is perhaps not the good genus for rubrotictum either. The genera that exist are perhaps not enough to cover these klinds of fungi.

I instantly hope that more and more sequencing working groups will get interested in all the various groups of Helotiales...

So keep this material safely in your herbarium.

Zotto