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28-10-2025 19:33

Nicolas Suberbielle Nicolas Suberbielle

Bonjour à tous,Je voudrais votre avis sur cette r

30-10-2025 03:53

Ethan Crenson

Hi all,  I would like an opinion on whether this

29-10-2025 19:02

Castillo Joseba Castillo Joseba

De la pasada semana en rama posiblemente de hayaPi

25-11-2016 13:54

Stephen Martin Mifsud Stephen Martin Mifsud

Hi, I found numerous seeds of Washingtonia robusta

28-10-2025 22:22

Bernard Declercq Bernard Declercq

Hello.I'm searching for the following paper:Punith

27-10-2025 19:51

Peter Welt Peter Welt

Who has this article? Doveri, F. 2007. Sporormiel

28-10-2025 15:37

Carl Farmer

I'd be grateful for any suggestions for this strik

28-10-2025 11:29

Tanja Böhning Tanja Böhning

Hello, I found this very small (ca 0,5mm) yellow

27-10-2025 00:34

Francois Guay Francois Guay

I found this strange species in Québec,Canada, gr

27-10-2025 15:29

Michel Hairaud Michel Hairaud

Bonjour à tous, Avec Elisabeth Stöckli nous avo

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Nectria on Frangula alnus
Björn Wergen, 27-07-2011 13:59
Björn WergenHi,

yesterday I have found a new Nectria on dead Frangula-twigs. It has very large spores with a length sometimes over 25 µm. The fruitbodies are clustered on a Stroma which seems not to be well developed, perithecia are about 0,2-0,4 mm and pale red to orange-red oder orange-brown. 

The interesting fact is, that the asci have almost only 4 or 6 spores. I didn't see any asci with 8 spores. Spore ornamentation seems to be smooth, without striae. I will add some photos here, perhaps someone can help me with this or at least with a good nectria-key (I have only one key with striae-spored nectria...)

best regards,
kazuya
  • message #15985
  • message #15985
Björn Wergen, 27-07-2011 15:01
Björn Wergen
Re : Nectria on Frangula alnus
note: I think the small spores are "secondary spores", aren't they? I had called them "conidia spores"...
Christian Lechat, 27-07-2011 20:37
Christian Lechat
Re : Nectria on Frangula alnus
Dear Kazuya,
could you please make a vertical section through ascomatal wall and stroma?
Conidia looks like Tubercularia.

Christian