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17-07-2019 21:35

Joop van der Lee

I am looking for the following documentation.Richa

17-07-2019 18:10

Jac Gelderblom

Hello On culms of Typha I found a small mollisia

10-07-2019 17:53

Andgelo Mombert

Bonjour, Fructifications érumpantes atteignant 4

17-07-2019 15:12

Thomas Læssøe

Has anyone Remler or the part that contains Belono

14-07-2019 10:38

Markus Wilhelm

Bonjour, je visite récente le forêt tropicale d

14-07-2019 19:14

Rubén Martínez-Gil Rubén Martínez-Gil

Boudier in 1917 describes Lamprospora lutziana and

16-07-2019 16:53

Elisabeth Stöckli

Bonjour, Sur feuilles mortes de Sempervivum à 2'

12-07-2019 14:29

Alessandro Fellin

Habitat: in torbiera a sfagni su steli guasti e im

16-07-2019 18:21

Michel RIMBAUD

Bonjour,Quelqu'un peut-il me fournir une clé actu

16-07-2019 12:37

Blasco Rafael Blasco Rafael

Hola.Tienen Ustedes alguna idea de que genero mira

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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