Accès membres

Mot de passe perdu? S'inscrire

23-12-2025 08:27

Hymenoscyphus?
Josep Torres Josep Torres

Hello.Small, yellowish ascomata, with very short a

07-03-2026 22:22

Volutella?
Josep Torres Josep Torres

Hello.Some very tiny conidiomes collected in the D

07-03-2026 13:06

Phaeohelotium parasulphuratus ?
éric ROMERO éric ROMERO

Bonjour tous, Sur cône d'épicea fortement imbu,

06-03-2026 17:51

Orbilia?
William Slosse William Slosse

Good evening all,On March 4, 2026, I found the fol

05-03-2026 16:30

Is this Diaporthe rudis?
François Bartholomeeusen

Dear forum members, On the 2nd of February 2026,

06-03-2026 09:41

indian literature
Alain GARDIENNET Alain GARDIENNET

Hi forum, I'm now looking for another reference c

28-02-2026 11:05

Peziza
Yanick BOULANGER

Bonjour à tousLe 24/02/2026 à Montmacq, devant m

05-03-2026 10:07

White apothecia on pine cone
Hulda Caroline Holte

Hello, I found and collected this species growing

05-03-2026 19:29

Ciboria caucus?
William Slosse William Slosse

Good evening everyone,On March 4, 2026, I found th

19-02-2026 17:49

Ayuda con Tarzetta sp
Salvador Emilio Jose

Hola buenas tardes!! Necesito ayuda para la ident

« < 1 2 3 4 5 > »
Black erumpent on Populus (Ascodichaenaceae?)
Edvin Johannesen, 30-06-2025 12:09
Edvin JohannesenThis tiny, rather "rough" erumpent asco was found on a decorticated twig of Populus tremula. Less than 1 mm in diameter. Spores ca. 10-11 x 3-4 µm, slightly bent (allantoid), hyaline, 1-celled. Asci IKI-. Paraphyses filiform, guttulate, somewhat branched. Greeninsh "resinous" substance in hymenium (KOH) - bluish green in Lugol. I'm thinking Rhytismatales/Ascodichaenaceae, possibly Pseudophacidium. P. ledi does not grow on Populus, does it?

Any suggestions?
  • message #83033
  • message #83033
  • message #83033
  • message #83033
  • message #83033
  • message #83033
  • message #83033
  • message #83033
Adam Polhorský, 30-06-2025 22:11
Re : Black erumpent on Populus (Ascodichaenaceae?)
Hi Edvin!

Interesting, is this from the monitored Populus log?

I think it could be related to Starbaeckia pseudotryblidioides, which is however only known from Pinus. The macro and micro resemblance is great. I have similar collections from Picea and Larix.

This sample would be interesting to sequence too.

Adam
Edvin Johannesen, 01-07-2025 00:09
Edvin Johannesen
Re : Black erumpent on Populus (Ascodichaenaceae?)
Thanks, Adam. Yes, it's from the same Populus log. There is one specimen of S. pseudotryblidioides from Norway (Nordén 2020), but I haven't checked on what substrate. I'll get back to you.

Cheers!
Edvin Johannesen, 01-07-2025 13:06
Edvin Johannesen
Re : Black erumpent on Populus (Ascodichaenaceae?)
Adam,

It turns out Mathias Andreasen (NINA in Oslo) would very much like to try to sequence it as part of ongoing work. However, it seems like we have more and can find even more material, so it should be possible to send to you, if you're interested.

Cheers and thanks for the response/interest!

Edvin
Adam Polhorský, 01-07-2025 21:04
Re : Black erumpent on Populus (Ascodichaenaceae?)
Ha, that is a really special tree:). Hmm, if the material is not too rich it is perhaps better not to split it and I can later contact Mathias to compare our data.
If it is truly no problem to collect more, I'm really interested. Later I will send you pics of similar colls.
Thank you again:)!!
Edvin Johannesen, 01-07-2025 23:35
Edvin Johannesen
Re : Black erumpent on Populus (Ascodichaenaceae?)
We'll see. Two attempts to sequence are better than one :-)