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14-12-2019 10:09

Marc Detollenaere Marc Detollenaere

Dear forum,   On a decorticated trunk of Populu

13-12-2019 20:42

Götz Palfner Götz Palfner

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

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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Nemania on Salix
Enrique Rubio, 24-07-2013 18:47
Enrique RubioDear friends:

I need your help for to know this Nemania species that grew on the underside of a piece of wood of Salix alba in a very wet place periodically covered by the water of a lake.


The blackish multiperitheciate stromata are crust of 50 x 25 mm and 1 mm thick covered by a mass of olivaceous fresh discharged ascospores. Ostioles conspicually papillate. The perithecia are ellipsoid and 0.45-0.70 mm long. The tissue beneath the perithecial layer is whitish, soft,extending into the wood.


The asci are long stipitate, 180-207 x 8 microns, pars sporifera 98-107. The apical apparatus is IKI and Mlz. deep blue. Fresh ascospores, 12-17 x 5-6, are brownish olivaceous and they have a short, inconpicuous germ slit probably situated on the more convex side.


I think this fungus is close to Nemania aenea var. macrospora or the Nemania sp. leg. J. Vivant from the wonderfull Fournier's web page.


Have you any idea?


Thanks again

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Jacques Fournier, 24-07-2013 19:16
Jacques Fournier
Re : Nemania on Salix
Hola Enrique!
I find the germ slits on your photos fairly conspicuous, in my experience they are difficult to make out in the variety macrospora. I think it is the typical variety aenea, other features fit well, especially the ecology. Occurrence on periodically submerged wood is something I observed on several occasions for this species.
Anyhow I suggest you compare it with the typical aenea, I am sure you have it in your herbarium!
Cheers,
Jacques
Enrique Rubio, 24-07-2013 20:02
Enrique Rubio
Re : Nemania on Salix
Bonsoir Jacques


No. I have not Nemania aenea var. aenea in my herbarium because I have never gathered it! 
Yes. Maybe you are right and of course you know well this genus, much better than me!
Perhaps the subjective concept of the germ-slit: conspicuous/inconspicuous did me to be wrong.


Your description at the web page says: 'Macroscopically, N. aenea   is much like N. serpens, with which it is easily confused' and in this case it is true because in the field I took it by Nemania serpens.

Thanks a lot again!
Jacques Fournier, 24-07-2013 20:38
Jacques Fournier
Re : Nemania on Salix
in fact they all look like N. serpens, this is why Nemania is great fun!