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27-04-2026 20:52

Mollisia or related genus from Portugal - with quite peculiar character
Lothar Krieglsteiner Lothar Krieglsteiner

Found on hanging tiwg of Olea europaea in dried-ou

27-04-2026 18:48

Micropodia pteridina?
Tony Moverley

Collected 23rd April 2026, Norfolk, EnglandSwarms

27-04-2026 17:41

another anamorph on monocotyleous remains from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

.. Algarve, same leaf than the last post. The con

27-04-2026 18:05

bright green minute anamorph on Citrus aurantius-twig from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

... still attached at standing tree. The green con

27-04-2026 17:16

anamorph on monocotyleous leaves from Portugal
Lothar Krieglsteiner Lothar Krieglsteiner

.. Algarve, moist lying.The conidiomata look like

27-04-2026 12:54

Spiral conidial crust
Steve Clements

Bonjour. Ce petit champignon blanc résupiné et

27-04-2026 09:59

Microdiplodia henningsii
Pauline. Penna

Bonjour Can anyone advise me on these pycnidia fo

26-04-2026 21:08

Ramularia sp ?
William Slosse William Slosse

Several species of Ramularia occur on Rumex that I

22-04-2026 20:54

Pyrenopeziza on monocot.
Enrique Rubio Enrique Rubio

Hi to everybody.This Pyrenopeziza grew in moist le

25-04-2026 11:34

lachnum pudicellum
Louis DENY

Bonjour forumdans la clé de Zotto, L. pudicellum

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Discomycete on wood with discoloration in red
Alex Akulov, 06-10-2013 15:35
Alex AkulovDear friends,
Today my wife find a Discomycete sample, which looks interesting. Its apothecia are formed on thin twigs of unknown deciduous tree with signs of discoloration in red. Young apothecia are yellow, but soon stay red as the wood .

Asci are 8 - sporous, very small, in average of 14 x 4.2 micrometers. Asci are both monostichous and distichous, but more frequently 6 spores at the top of ascus are placed in two rows, and the two spores near the ascus leg are placed in one row. The size of ascospores: 3.1-3.3 x 1.7-2.2 micrometer.


Please, tell me what is this species and whether it is the cause of red staining of wood or vice versa it absorbs red pigment from the wood.


Thanks in advance ,
Alex

  • message #25347
  • message #25347
Hans-Otto Baral, 06-10-2013 16:33
Hans-Otto Baral
Re : Discomycete on wood with discoloration in red
Hi Alex

it might be a Hyphodiscus, but to clarify you should lok for marginal hairs, and whether it has a gelatinized excipulum. 

H. hymenipohilus is known to stain the wood in red by its anamorph.

Do you have a photo of an ascus? is it amyloid?

Zotto
Alex Akulov, 06-10-2013 17:05
Alex Akulov
Re : Discomycete on wood with discoloration in red
Dear Zotto
Thanks for your advice! In the Lugol reagent apical apparatus of asci colored in blue. Most of the asci in my sample are immature, but as a whole the morphology of asci, spores and marginal hairs are very similar to those shown on the site: http://asco-sonneberg.de/pages/gallery/hyphodiscus-hymeniophilus-091227-mcol-0115551.php?group_id=15511&position=2

The legs of asci are enough long and their overall size, even in an immature state is 37 x 4.3 micrometer.


Probably I'm dealing with a young specimen of Hyphodiscus hymeniophilus.


Alex

Hans-Otto Baral, 06-10-2013 17:16
Hans-Otto Baral
Re : Discomycete on wood with discoloration in red
This species is quite variable, can be grey or white, and not easy to say if one species r perhaps several. But the genus is clear, and the red stain typical. Often it grows on remnants of Aphyllophorales.