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02-07-2025 18:45

Elisabeth Stöckli

Bonsoir,Sur feuilles d'Osmunda regalis (Saulaie),

02-07-2025 17:26

Yanick BOULANGER

BonjourRécolté sur une brindille au fond d'un fo

02-07-2025 09:32

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello, bonjour.Here is the paper I'm searching for

30-06-2025 16:56

Lydia Koelmans

Please can anyone tell me the species name of the

01-07-2025 23:37

Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

30-06-2025 12:09

Edvin Johannesen Edvin Johannesen

This tiny, rather "rough" erumpent asco was found

30-06-2025 06:57

Ethan Crenson

Hi all, Another find by a friend yesterday in Bro

30-06-2025 19:05

ALAIN BOUVIER

Bonjour à toutes et à tousJe cherche à lire l'a

30-06-2025 14:45

Götz Palfner Götz Palfner

This is a quite common species on Nothofagus wood

25-06-2025 16:56

Philippe PELLICIER

Bonjour, pensez-vous que S. ceijpii soit le nom co

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Black Asco Immersed in Stem of Carex
Peter Thompson, 29-06-2019 15:10
Hello Everyone,

I have found a puzzling ascomycete with tiny spheres embedded just beneath the surface of a sedge stem, within an alder and willow carr environment. The perithecia are scattered, with ostioles just piercing the surface of their host.

The spores begin hyaline, filled with drops and with one central septum. By the time that they mature they have  become olivaceous brown with three septa. They typically measure between 35 to 37.5 x 8 um. The 8-spored asci do not react to lugol.

I have attached a photo of the fruit bodies as seen, peppering their host. Also, a photo, under immersion oil, of immature spores contained in an ascus and another showing mature spores and the structure of the excipulum.

I wonder if anyone has any idea as to which species they might be?

Thank You,
With Best Wishes,
Peter.
  • message #58329
  • message #58329
  • message #58329
Peter Wilberforce, 09-07-2019 10:00
Re : Black Asco Immersed in Stem of Carex

Hello Peter,


The spores remind me of the genus Astrosphaerella.


I have seen only the species A.stellata from old bamboo.


Regards,


Peter