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26-02-2015 19:16

Literature aide on Pseudeurotium
Enrique Rubio Enrique Rubio

Please, can you help me for to obtain this papaer?

09-06-2020 20:15

Noir sur Acer
Andgelo Mombert Andgelo Mombert

Bonsoir, Sur branche morte d'Acer pseudoplatanus.

09-06-2020 07:27

Mollisia polygoni?
Juuso Äikäs

I thought I'll post one more species and then have

07-06-2020 21:11

On Larix decidua needles - Calycina/ Antinoa?
Pavol Palo

Hello friends, may I ask you for help ? I would n

04-06-2020 19:30

Diaporthe or related? On dogwood twig.
Edvin Johannesen Edvin Johannesen

I did not draw the black lines here - the fungus d

06-06-2020 17:17

Lachnum
Robin Pétermann Robin Pétermann

J'ai également trouvé ce Lachnum sur Filipendula

01-06-2020 15:51

Teichospora ?
Andgelo Mombert Andgelo Mombert

Bonjour, Sur branche morte décortiquée de Salix

08-06-2020 07:01

White and hairy on Equisetum
Juuso Äikäs

I found these on a piece of dead Equisetum (fluvia

01-06-2020 16:39

Pirottaea on Veratrum
Andgelo Mombert Andgelo Mombert

Bonjour, Un dernier pour aujourd'hui. Sur tige m

18-02-2017 20:37

Cheilymenia sp. on wooden chips possibly mixed with excreta
Stephen Martin Stephen Martin

Hi, I found clusters of amber=yellow discoid ascom

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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.