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15-10-2019 21:47

Stephen Mifsud Stephen Mifsud

Hi, my eye fell on a dead stalk of a herbaceous pl

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Alessio Pierotti Alessio Pierotti

Happy new year to all friends of the forumSomeone

15-10-2019 05:23

Yulia Lytvynenko

Dear friends.Looking for a copy of the following w

14-10-2019 16:02

Yulia Lytvynenko

Dear friends.Looking for a copy of the following w

14-10-2019 20:00

Michael Haldeman

This collection is from bark at the base of a dead

12-10-2019 22:16

Michael Haldeman

I found this fungus on the thallus of Ochrolechia

12-10-2019 22:06

Mirek Gryc

Hello all.A few days ago I found Peziza which I in

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Thorben Hülsewig

Hi there, I have here a Calycina sp. which I cann

13-10-2019 18:13

Riet van Oosten Riet van Oosten

Hello, On the culm of Phragmites australis (on th

13-10-2019 18:42

Ethan Crenson

Does anyone have: Liew, E.C.Y.; Aptroot, A.; Hyde

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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,
  • 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.