Accès membres

Mot de passe perdu? S'inscrire

29-03-2024 09:21

Michel Hairaud Michel Hairaud

Bonjour, Je recherche la description du genre Mac

26-03-2024 17:14

Juuso Äikäs

These little black ascos were growing on a dead, d

28-07-2011 18:31

Alex Akulov Alex Akulov

Dear FriendsToday I made the pdf file of Velenovsk

27-03-2024 22:53

Charles Aron Charles Aron

Hi All,Recently I came across these minute, setose

25-03-2024 13:41

B Shelbourne B Shelbourne

• Hyaloscyphaceae (no VBs), Hyaloscypha: Macro a

25-03-2024 21:27

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, March 2024

26-03-2024 14:37

DAVID MARCOS DAVID MARCOS

Spores (telles qu'elles apparaissent à l'intérie

24-03-2024 08:27

Thierry Blondelle Thierry Blondelle

HiOn Hedera helix fallen branchEcological habitat:

26-03-2024 11:06

michel bertrand

Bonjour, Malgré de nombreuses recherches, je n'a

25-03-2024 14:08

Ursula Kozik

Bonjour et bonne journée, On m'a envoyé une tro

« < 1 2 3 4 5 > »
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

  • message #24519
  • message #24519
  • message #24519
  • message #24519
  • message #24519
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!