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22-04-2025 09:35

Anamorph on a seed-pod of Cytisus scoparius
François Bartholomeeusen

Dear forum members, Can someone help me!On April

22-04-2025 10:37

A second anamorph on seed-pod Cytisus
François Bartholomeeusen

Also found on April 18, 2025 on an old seed-pod of

29-03-2025 05:45

Ciboria / Rutstroemia (?)
Sebastien Basso

Hello, I'm conducting a mycological inventory in

21-04-2025 10:52

Ayuda con esta
Castillo Joseba Castillo Joseba

me mandan el material de Galicia (España), recole

18-04-2025 23:16

Mollisia
Robin Pétermann Robin Pétermann

Bonjour, Voici une probable Mollisia, genre que j

19-04-2025 20:48

Pyreno on Fagus sylvatica.
Per Marstad Per Marstad

Dear Ascofrance. I have not posted pyrenos for a l

19-04-2025 18:58

Korf & Lizon 2000
Michel Hairaud Michel Hairaud

Bonjour,Je recherche l'article suivant :  ... K

19-04-2025 08:51

Unknown pyrenomycetous fungus growing on cowberry
Henri Koskinen

Could you help me in the right direction with this

18-04-2025 21:54

Unknown aquatic pyrenomycete
Hartmut Schubert Hartmut Schubert

Hi Forum,I found this aquatic pyrenomycete a few d

16-04-2025 08:53

Anamorph on a leaf.
Josep Torres Josep Torres

Hello.An anamorph photographed under holm oaks thi

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Nectria mammoidea?
Björn Wergen, 14-12-2011 01:11
Björn WergenHi,

I just need a confirmation that I am on the right way with my new Nectria finding on Fraxinus. Perithecia 0,2-0,4mm, with distinct darker ostiole region, orangered to dark red. Spores smooth (?), up to 20x8µm, mostly with a single septa, but some spores with a second septa, thickwalled. Asci with 8 spores. Wall up to 40-50µm thick.

thanks and regards,
björn
  • message #16861
  • message #16861
  • message #16861
Christian Lechat, 14-12-2011 05:12
Christian Lechat
Re : Nectria mammoidea?
Dear Björn,
It could be Neonectria ditissima (Tul. & C. Tul.) Rossman & Samuels

Christian
Björn Wergen, 14-12-2011 09:59
Björn Wergen
Re : Nectria mammoidea?
Hi Christian,

yes, the ditissima was my second opinion, in Nordic Macromycetes (Vol 1) it seems not really clear what "Perithecia uniformly coloured" means (the perithecia were not uniformly coloured). If I select this way, I come directly to N. ditissima with spores around 14-21x5-8µm, which fits well to my finding. 

I know that I have some Nectria-keys somewhere on my PC. If you have some helpful docs, please let me know, I am very interested in pyrenos at all and especially Nectria, Valsa, Diaporthe, Pleospora and so on :D

regards,
björn