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02-04-2015 22:41

Jenny Seawright Jenny Seawright

Hello all, I found a patch of Nectria on a living

03-04-2015 18:08

Alain GARDIENNET Alain GARDIENNET

Bonjour à tous, Périthèces sphériques noirs s

01-04-2015 22:04

Bernard CLESSE Bernard CLESSE

Sur écorce vivante de saule.Au microscope, des co

01-04-2015 19:05

Gernot Friebes

Hi, I have got material of two Helicogermslita spe

02-04-2015 21:38

Castillo Joseba Castillo Joseba

Me envian desde Galicia una muestra de este hongo.

01-04-2015 17:58

Bernard CLESSE Bernard CLESSE

Sur hépatique à feuilles (Calypogeia), sur talus

29-03-2015 23:46

Jenny Seawright Jenny Seawright

Hi all, From appearance and conidia size (4-5 x 1.

28-03-2014 23:13

Nick Aplin

Salut à tous, On 26/3/2014 I found some little p

30-03-2015 14:15

Enrique Rubio Enrique Rubio

Hi to all This Anthostomella grew on wet dead ste

01-04-2015 18:09

Bernard CLESSE Bernard CLESSE

Une espèce commune (si je l'ai bien reconnue !) m

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Nectria on Salix
Jenny Seawright, 02-04-2015 22:41
Jenny SeawrightHello all,

I found a patch of Nectria on a living branch of Salix cinerea in damp woodland - perithecia yellow becoming orange and then red, slightly darker at the apices, the surfaces appearing rough but not strongly warted. Spores were hyaline, 1-septate, (15)17-20 x 7µm. 

Using Ellis & Ellis Nectria veuillotiana seemed a good possibilty until I compared the perithecia with those shown here:
http://www.ascofrance.fr/search_recolte/2149

Once again assistance appreciated!
With regards,
Jenny

  • message #34935
  • message #34935
  • message #34935
Christian Lechat, 03-04-2015 06:42
Christian Lechat
Re : Nectria on Salix
Hi Jenny,

 Are the ascospores ornamented or smooth?
Your fungus fits better Thelonectria discophora.

Best wishes,
Christian
Jenny Seawright, 03-04-2015 23:44
Jenny Seawright
Re : Nectria on Salix
Hi Christian - my first reply disappeared so this is the next attempt!

Thank you - the texture and apices of the AscoFrance images of Thelonectria discophora correspond perfectly with what I was seeing down the microscope.

"Are the ascospores ornamented or smooth"
I wasn't quite sure what I should be looking for but have added some images in Cotton Blue.
Attempted images of a perithecia section - fortunately someone has kindly offered to do a 'proper' section for me......

With regards,
Jenny




  • message #34949
  • message #34949
Christian Lechat, 04-04-2015 06:03
Christian Lechat
Re : Nectria on Salix
Jenny,
your image (from left) suggests that the ascospores observed in water are spinulose. This characteristic fits well to T. discophora.
Best gegards,
Christian
Jenny Seawright, 04-04-2015 09:53
Jenny Seawright
Re : Nectria on Salix
Thank you very much Christian
Jenny