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07-03-2012 12:13

Dragiša Savic

Hi everyone,I know for this forum for some time bu

25-03-2012 19:03

Björn Wergen Björn Wergen

Hiyesterday I have found a completely immersed pyr

12-03-2012 13:44

Alex Akulov Alex Akulov

Dear colleaguesI am very interested in the bookArx

22-03-2012 00:38

Roland Labbé

Bonjour ! Voici une planche d'un Ascobolus lineol

26-03-2012 22:54

Björn Wergen Björn Wergen

Hi,does anybody have this paper:SHOEMAKER R. A. 19

27-03-2012 22:14

Roland Labbé

Bonjour !Voici une planche et une photo macro de c

24-03-2012 12:57

Yannick Mourgues Yannick Mourgues

Hi. Macro : apo with a red to dark red hymenium,

26-03-2012 22:52

M Jonathan M Jonathan

J'ai trouvé un Chlorociboria Sp mais je n'arrive

06-03-2012 13:12

Stefan Blaser

Hello everybody I hope that anyone can help me wi

20-03-2012 17:40

Michel RIMBAUD

Bonjour à tous,Sur la paroi'intérieure d'une gro

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Nectria-like
Bernard Declercq, 03-07-2016 18:29
Bernard DeclercqHi,

Collected in October 1992 on decaying petioles of Petasites hybridus:
Perithecia superficial, gregarious, subglobose, flattened upper part, 0.3-0.4(0.5) mm diam., indistinct papillate, yellow-orange, with a crown of spreading, hyaline hairs.
Asci 8-spored, 73-83x9-10 µm.
Spores narrowly ellipsoid, 18-23(25)x5.5-7 µm, 1-septate, filled with 1-2 µm diam. guttules, smooth, hyaline.
Perithecial wall of textura angularis. Processes tapering, up to 115x13 µm, composed of agglutinated 2 µm diam. hyphae, hyaline.
Only a drawing available. Any idea? Thanks in advance.

  • message #43625
Christian Lechat, 03-07-2016 21:09
Christian Lechat
Re : Nectria-like
Hi Bernard,
Description of ascomatal wall, colour of perithecia in KOH as well as in lactic acid are required.
If there is no changing colour, you have choice among four genera:
Lasionectria, Lasionectriella, Ijuhya and Hydropisphaera, which are separated by characteristics of the cells composing the wall.
Did you see some orange, oily droplets in ascomatal wall or in hymenium?

Good luck
Christian