05-07-2025 12:38
Åge OterhalsI found this pyrenomycetous fungi in pine forest o
04-07-2025 20:12
Josep Torres
Hello.A fungus growing on the surface of a trunk o
20-06-2025 08:33
Josep Torres
Hello.Small, blackish, mucronated surface grains s
28-06-2025 16:00
Josep Torres
Hello.A tiny fungus shaped like globose black grai
04-07-2025 12:43
Castillo Joseba
me mandan el material seco de Galicia (España)
03-07-2025 18:40
Castillo Joseba
me mandas el material seco de Galicia (España) re
03-07-2025 20:08
Francois Guay
I found this interesting yellowish asco growing on
01-07-2025 23:37
Josep Torres
Hello.A Pleosporal symbiotic organism located and
02-07-2025 17:26
Yanick BOULANGERBonjourRécolté sur une brindille au fond d'un fo
02-07-2025 18:45
Elisabeth StöckliBonsoir,Sur feuilles d'Osmunda regalis (Saulaie),
Discomycete on Quercus rubra branches
Alex Akulov,
14-08-2012 19:19
Dear FriendsCan you help me with identification of discomycete sample from Q. rubra branches?
When I collect it, I was sure that it is Pezicula sp., but I meet smaller and distinctly verrucose spores.
Grateful before,
Alex
Hans-Otto Baral,
14-08-2012 19:38
Re : Discomycete on Quercus rubra branches
Hi Alex
did you test with Lugol? I suppose it is a Pezicula which should show a deep red apical ring. Don't use Melzer 'cause that would resulat in no reaction at all.
Zotto
did you test with Lugol? I suppose it is a Pezicula which should show a deep red apical ring. Don't use Melzer 'cause that would resulat in no reaction at all.
Zotto
Alex Akulov,
14-08-2012 20:21
Re : Discomycete on Quercus rubra branches
Thank you, Zotto,
But I dont seen red apical ring in Lugol.
Alex.
But I dont seen red apical ring in Lugol.
Alex.
Alex Akulov,
14-08-2012 20:38
Re : Discomycete on Quercus rubra branches
Sligthly roseous tips can be considered in several asci, but it is not deep red.
Alex
Alex
Hans-Otto Baral,
14-08-2012 20:47
Re : Discomycete on Quercus rubra branches
Maybe you need to apply more of your solution. You are sure it does not contain chloralhydrate?
Zotto
Zotto
Alex Akulov,
14-08-2012 20:53
Re : Discomycete on Quercus rubra branches
Can it be immature Pezicula cinnamomea?
I used pure Lugol.
Alex
I used pure Lugol.
Alex
Hans-Otto Baral,
14-08-2012 20:58
Re : Discomycete on Quercus rubra branches
Yes, I suppose, but I would rather say dead instead of immature. The asci have their deep red apical ring already very early during development, when the spores are still not present.
Your Lugol should look honey-brown in the bottle, if yellow you need to add a few iodine crystals. But the pure red reaction in Pezicula (type rr) is shown with yellow Lugol also.
Your Lugol should look honey-brown in the bottle, if yellow you need to add a few iodine crystals. But the pure red reaction in Pezicula (type rr) is shown with yellow Lugol also.
Alex Akulov,
14-08-2012 20:58
Re : Discomycete on Quercus rubra branches
I try to prepare fresh Lugol solution tomorrow and to make photo again.
Alex
Alex
Alex Akulov,
14-08-2012 21:02
Re : Discomycete on Quercus rubra branches
Thank you for advise!
Really, I was able to see the redish color only in the very immature asci, where spores has only begun to take shape.
Alex
Really, I was able to see the redish color only in the very immature asci, where spores has only begun to take shape.
Alex