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

Jacques Fournier, 24-07-2013 19:16

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

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

Re : Nemania on Salix

in fact they all look like N. serpens, this is why Nemania is great fun!