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04-07-2025 20:12

Black thready anamorph
Josep Torres Josep Torres

Hello.A fungus growing on the surface of a trunk o

20-06-2025 08:33

Ascomycete on a herbaceous stem.
Josep Torres Josep Torres

Hello.Small, blackish, mucronated surface grains s

28-06-2025 16:00

Salvia leaf parasite
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Hello.A tiny fungus shaped like globose black grai

04-07-2025 12:43

En tallo de herbaceas 1102
Castillo Joseba Castillo Joseba

me mandan el material seco de Galicia (España) 

03-07-2025 18:40

Melampsora ??? en Salix
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me mandas el material seco de Galicia (España) re

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Yellowish asco on submerged Larix needles
Francois Guay Francois Guay

I found this interesting yellowish asco growing on

01-07-2025 23:37

Help with a Pleosporal.
Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

02-07-2025 17:26

hymenoscyphus albidus
Yanick BOULANGER

BonjourRécolté sur une brindille au fond d'un fo

02-07-2025 18:45

Sur Osmunda regalis
Elisabeth Stöckli

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

02-07-2025 09:32

Searching of a paper from The Mycologist
Nicolas VAN VOOREN Nicolas VAN VOOREN

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

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yellow small disco
Masanori Kutsuna, 01-10-2013 10:28
Hello everyone.I found small disco on dead stems.

Disc yellowish, up to 2 mm., stalk whitish, smooth and slender.
Asci 142-160 x 12.8-14.4 microns, IKI+.
Ascospores 40-48.7 x 4.5-5.8 microns.
Paraphyses filled with refractive contents.
Ectal excipulum, parallel, thick-wall, gelatinous hyphae.


Is this a Crocireas?
I couldn't identify by Carpenter's monograph.


Best wishes,
Kutsuna

  • message #25315
  • message #25315
Hans-Otto Baral, 01-10-2013 12:52
Hans-Otto Baral
Re : yellow small disco
Hi Kutsuna

This is certainly a Hymenoscyphus in which the excipular cells are also somewhat gelatinized. Such strongly heteropolar spores are unknown in Crocicreas or Cyathicula.

This find is interesting, it reminds me of the N-American Hymenoscyphus dearnessii, a variant of which is known from Europe, here exclusively on Fallopia (Reynoutria). But the spores are not as big as you say, also they should have bristles at the ends.


Have you more microphotos? Ascus croziers?  In which part of thw wordl did you collect, and what could the substrate be?

Zotto
Masanori Kutsuna, 02-10-2013 01:40
Re : yellow small disco
Dear Zotto

Thank you for your reply.

This disco collected in bush near beech forest, Tottori, Japan, 22.Sept.2012.
Substrate uncertain herbaceous stem, I think Polygonaceae.


I have no more microphotos, but I couldn't observe coriziers and bristles.

Kutsuna   

Hans-Otto Baral, 02-10-2013 10:16
Hans-Otto Baral
Re : yellow small disco
There is a report of a Hymenoscyphus sp. from China, maybe it is this species, though the spores are not as attanuated at the base as in yours.

Yu et al. 2000, Mycotaxon 75: 395-408

This sounds like a new species.

Zotto
Masanori Kutsuna, 02-10-2013 10:23
Re : yellow small disco
Thank you again.

Kutsuna