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09-02-2026 22:01

ruiz Jose

Hola, me paso esta colección en madera de pino, t

09-02-2026 20:10

Lothar Krieglsteiner Lothar Krieglsteiner

The first 6 tables show surely one species with 2

09-02-2026 14:46

Anna Klos

Goedemiddag, Op donderdag 5 februari vonden we ti

09-02-2026 11:42

Åge Oterhals

Hi forum, I found this Lachnum on old hardwood tw

02-02-2026 21:46

Margot en Geert Vullings

On a barkless poplar branch, we found hairy discs

25-01-2026 23:23

Tomaz Vucko Tomaz Vucko

Hello! I found this species that resembles Delitsc

06-02-2026 01:14

Tomaz Vucko Tomaz Vucko

Hello!How would you name this species? Most perith

04-08-2014 17:35

Leandro Sánchez Leandro Sánchez

Sur branche de feuillus, jusqu'à 22 mm diamètre,

05-02-2026 15:07

Vasileios Kaounas Vasileios Kaounas

Found on a fallen needle of Pinus halepensis, diam

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White asco on Fagus grandifolia leaf
Francois Guay, 03-10-2025 22:17
Francois GuayHi everyone,
 

I found this white, star-shaped asco on a Fagus grandifolia leaf in Quebec, Canada.

Spores: 15–16.6 × 3.5–4.3 µm

Asci: IKI+

Here’s the iNat link with photos and microscopy:


Any idea what it could be?

Thanks!
Hans-Otto Baral, 04-10-2025 08:41
Hans-Otto Baral
Re : White asco on Fagus grandifolia leaf
I do not understand the macroscopy. Are the apos stalked or sessile and what about the toothed receptacle? What are the teeth composed of?

Microscopy recalls H. caudatus agg.
Francois Guay, 05-10-2025 21:28
Francois Guay
Re : White asco on Fagus grandifolia leaf
Yes, the apothecia were short-stalked. I think the "star shape" is just an unusual shape; next to them were some other apothecia with a regular form like other Hymenoscyphus. The teeth were just like the rest of the hymenium.
Thanks Zotto