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17-10-2025 18:45

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, Oct. 2025.

25-11-2016 13:54

Stephen Martin Mifsud Stephen Martin Mifsud

Hi, I found numerous seeds of Washingtonia robusta

19-10-2025 18:58

Bernard CLESSE Bernard CLESSE

Bonsoir à toutes et tous,Il y a un peu plus de de

20-10-2025 09:36

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello.I'm searching for the following article:Bene

19-10-2025 14:10

Camille Mertens

Bonjour à tous.Asco stipité 1mm de texture appar

23-09-2025 13:31

Thomas Læssøe

https://svampe.databasen.org/observations/10534623

15-10-2025 16:39

Edvin Johannesen Edvin Johannesen

These tiny (0.2-0.6 mm), white, pulvinate apotheci

03-10-2025 13:44

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde on Populus

13-10-2025 19:05

Louis DENY

Bonjour forumSur tronc décortiqué de feuillu x,

17-02-2013 21:11

Peter Welt Peter Welt

Jamoni, P.G. 1998. Un nuovo discomicete coprofilo

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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