
03-09-2025 12:44
Hi to somebody.I would like to know your opinion o

03-09-2025 21:59
Philippe PELLICIERLa Léchère, Col de la Madeleine, alt 1970m, au s

31-08-2025 19:41
Hi to someone.I need to download this issue of Sve

02-09-2025 11:34
Thomas Læssøehttps://svampe.databasen.org/observations/10527903

31-08-2025 17:32

Bonjour, Pas d'identité trouvée pour cette réc

01-09-2025 08:42
François CorhayUn ami, conservateur d'une RN en Belgique, m'a adr

31-08-2025 14:34
Thomas FlammerI have found a Rutstroemia on abt. 2000 m on Alnus

29-08-2025 19:04
Thomas FlammerSpores 21.2 - 26.2 x 8.3 - 11.3 µm - Q: 2.20 - 2.
Nectria on Frangula alnus
Björn Wergen,
27-07-2011 13:59

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
Björn Wergen,
27-07-2011 15:01

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

Re : Nectria on Frangula alnus
Dear Kazuya,
could you please make a vertical section through ascomatal wall and stroma?
Conidia looks like Tubercularia.
Christian
could you please make a vertical section through ascomatal wall and stroma?
Conidia looks like Tubercularia.
Christian