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11-05-2026 12:32

Bernard CLESSE Bernard CLESSE

Pourriez-vous m'aider à identifier cette héloti

11-05-2026 20:22

Lothar Krieglsteiner Lothar Krieglsteiner

on attached twig of standing Ficus caricaquite uns

28-04-2026 20:07

Lothar Krieglsteiner Lothar Krieglsteiner

... on twig in the air at standing Ceratonia siliq

11-05-2026 13:22

Sylvie Le Goff

BonjourPuis avoir votre avis sur cet ascome, je vo

29-04-2026 10:44

Lothar Krieglsteiner Lothar Krieglsteiner

growing at moist, drying-out soil at the side of a

11-05-2026 13:47

Åge Oterhals

Does anyone have av copy of Hawksworth & Siva

05-04-2026 22:46

Lothar Krieglsteiner Lothar Krieglsteiner

on wood of Ceratonia, Algarve, 3.4.2026.The color

10-05-2026 16:18

brigitte vignot

bonjour trouvée  en Ariège sur bois une petite

10-05-2026 23:17

Andreas Gminder Andreas Gminder

Hello,today we found in a moist steep decidous for

27-04-2026 17:16

Lothar Krieglsteiner Lothar Krieglsteiner

.. Algarve, moist lying.The conidiomata look like

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Diatrype on Betula
Enrique Rubio, 04-09-2012 14:29
Enrique RubioCan this fungus be Diatrype undulata? I have collected it on Betula alba branches at 1600 m and I think could be this species but the macro/micro-differences with another Diatrype species as D. decorticata are very small. Off course, I don't know the conidia. Ostioles are conical, split and slightly protruding. Perithecia up to 500 microns long. I see any blue reaction of the apical pore in Mlz., IKI or KOH pret. (Rappaz says that the asci are I (+)!!)
What do you think?
Many thanks again
  • message #19622
  • message #19622
  • message #19622
Alain GARDIENNET, 04-09-2012 18:19
Alain GARDIENNET
Re : Diatrype on Betula
Dear Enrique,
We had a discussion on this forum, a apart of your answers are inside : http://www.ascofrance.fr/search_forum/16922
My personal opinion is that your fungus is very probably D. undulata. I recognize ondulate (ethymology of undulata) stromate that I regularly observe on Betula. But you are right,  teleomorphs are very close.
Very good photos, as usual !
Alain
Enrique Rubio, 04-09-2012 18:56
Enrique Rubio
Re : Diatrype on Betula
Cher Alain
J'avais lu la discussion que tu me dites mais les differences entre D. decorticata et undulata restent encore peu claires, au moin san practiquer les cultures.

Connais tu si quand Rappaz appele I(+) il pense a la refringence de l'aparail apicale ou il pense á son amyloidisme?
Merci beaucoup
Enrique