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07-12-2025 17:43

Helvella
Malcolm Greaves Malcolm Greaves

This Helvella was in mixed woodland. Uniform cupul

07-12-2025 16:07

Ascomycet mit Sammelfruchtkörper.
Arnold Büschlen

Hallo, ich habe in einer Moos-Aufsammlung (epiohy

05-12-2025 17:33

Lachnum sur feuille de chêne
Bruno Coué Bruno Coué

Bonjour, je serais heureux de recueillir votre avi

07-12-2025 09:24

Una Dacrymycetaceae
Castillo Joseba Castillo Joseba

De la pasada semana en Galicia EspañaEn el suelo

06-12-2025 00:19

Literature search (Raitviir Galán)
Viktorie Halasu Viktorie Halasu

Hello, would anyone have this article, please? An

04-12-2025 23:53

Anthracobia key
Malcolm Greaves Malcolm Greaves

Is there an up to date Anthracobia key available?T

04-12-2025 21:30

literature search
Ethan Crenson

Hello all, I am looking for the following:  Bar

02-12-2025 18:59

Round spores asco
Malcolm Greaves Malcolm Greaves

This pair of ascos 2.5cm across were on recently b

03-12-2025 20:02

Godronia sp.
Buckwheat Pete

Hello everyone, does anyone know the genus Godroni

02-12-2025 19:25

Lasiosphaeriaceae
Buckwheat Pete

Hello, can anyone identify this hairy fungus growi

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Asco on Himalayan Balsam
Malcolm Greaves, 04-06-2020 18:28
Malcolm GreavesHello
Can someone help with this long necked flask found on a dead Himalayan Balsam stem.
Only 1/3mm with spores 5.3 x 2.5. The spores look to be developing a septa but I could find none with a fully developed one so migh just be the internal structure.
Thanks
Mal
  • message #63549
  • message #63549
  • message #63549
Guy Buddy, 04-06-2020 23:25
Re : Asco on Himalayan Balsam
Hey Mal
I will take a guess and say something in the ophiostomatales but with only the anamorph it’s hard to narrow it down.
Devin
Malcolm Greaves, 05-06-2020 08:42
Malcolm Greaves
Re : Asco on Himalayan Balsam
Ok thanks for that Devin.
Mal
Paul Cannon, 05-06-2020 18:12
Re : Asco on Himalayan Balsam
Hello Mal

It's possible that this could be Arxiomyces vitis (syn. Phaeostoma vitis), which has evanescent asci with ascospores about the size that you give. They have a single large germ pore (large in comparison to the spore width) at one end of the ascospore - I wasn't sure whether I could see that in your image. It would only be the second GBI collection, to my knowledge, and if you have more material I'd be interested to see it.

There's not much published info on the genus but I'll send you a paper that treats the species (as Phaeostoma).

Best wihes

Paul
Malcolm Greaves, 06-06-2020 22:23
Malcolm Greaves
Re : Asco on Himalayan Balsam
Thanks I will get it in the post.
Paul Cannon, 14-06-2020 17:02
Re : Asco on Himalayan Balsam
I've looked at the specimen that Mal kindly sent me. I think it is a species of Arxiomyces, but it is a little different from A. vitis and is probably undescribed.