09-06-2026 18:32
Camille MertensSur morceau de roseau immergé 0,5 - 0,7 mm de dia
10-06-2026 12:54
Steve ClementsBonjour encore, Pouvez-vous m'aider, s'il vous pl
10-06-2026 23:08
éric ROMERO
Bonjour tous, Je vous propose un Mollisia trouvé
10-06-2026 21:16
François Freléchoux
Bonsoir,Le dernier du jour, en attendant votre avi
10-06-2026 21:07
François Freléchoux
Toutes les tiges de gentianes jaunes de l'an passÃ
10-06-2026 13:41
François Freléchoux
Bonjour à nouveau, Voici une trouvaille d'hier.
10-06-2026 11:53
Steve ClementsBonjour, This disco is abundant on dead stems of
10-06-2026 10:45
François Freléchoux
Bonjour à nouveau, Encore une détermination qui
08-06-2026 10:16
Spooren Marco
I don`t have a clou about this fungus,it is not in
10-06-2026 09:24
François Freléchoux
Bonjour, J'imagine que cette détermination ne do
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.Â
Alex
Really, I was able to see the redish color only in the very immature asci, where spores has only begun to take shape.Â
Alex