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25-03-2026 13:54

Enrique Rubio Enrique Rubio

Does anyone know where I could download the work b

25-03-2026 10:35

Hulda Caroline Holte

Hello,I collected this species growing on a dead b

24-03-2026 19:59

William Slosse William Slosse

Hello everyone,On 23/03/26, I found the following

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Lepista Zacarias

Hello everyone, Does any one know of any literatu

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Elisabeth Stöckli

Bonsoir,Sur bois (tronc) très pourri de conifère

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Hello all, A friend collected this asco in a wood

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Miguel Ãngel Ribes Miguel Ángel Ribes

Good eveningI'm unable to identify this Coprotus o

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Paul Cannon

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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