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30-05-2026 21:12

Philippe PELLICIER

Sur branche de mélèze (Larix) près de la neige,

25-05-2026 16:35

Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,J'ai trouvé récemment,

29-05-2026 15:35

daniel FERRE

Bonjour à tous,Je voudrais votre aide pour cette

28-05-2026 16:15

James Mitchell

Hello,Does anyone have the original publication of

28-05-2026 11:06

Thomas Læssøe

https://svampe.databasen.org/observations/10596750

23-05-2026 11:44

Charles Grapinet Charles Grapinet

Hello, I am having trouble identifying this copro

25-05-2026 16:44

François Bartholomeeusen

Hi forum members,During an excursion organised by

26-05-2026 21:25

Dirk Gerstner

Hello everyone, I'm completely stumped by this li

26-05-2026 22:44

Ethan Crenson

Hi all, I think I have Incrucipulum capitatum her

22-05-2026 14:44

Lothar Krieglsteiner Lothar Krieglsteiner

in unripe condition citrine yellow, then soon fadi

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Valsa on Salix
Karl Soler Kinnerbäck, 30-01-2022 20:13
Hi! 

Need help with this Valsa on Salix, Uppsala, Sweden, 2022-01-29. 

Sp. 14-19 x 2,5-3.    Asci 8-spored.

No stromatic line as far as I can see. Was thinking about V. ambiens or sordida. 

Best regards
Karl
  • message #71663
  • message #71663
  • message #71663
  • message #71663
  • message #71663
Eduard Osieck, 31-01-2022 11:19
Re : Valsa on Salix
Hi,
Probably V. ambiens because V. sordida usually has much shorter ascospores: 8-12 (-15) x 1-3 um according to Hayova & Minter 1998.
Eduard
Karl Soler Kinnerbäck, 31-01-2022 13:30
Re : Valsa on Salix
Hi Eduard,

Thanks for your suggestion! It sounds resonable. I actually found V. ambiens on Acer during the same field visit but that specimen had clearly wider spores (3-4), which made me wonder if they were really the same. Is it a reasonable variation in spore size?

Best regards
Karl