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06-06-2025 12:12

S. capillipes
Hans-Otto Baral Hans-Otto Baral

Dear all I want to ask you if you have any recent

04-06-2025 15:10

Hairy disco on ?Aegopodium
Stefan Jakobsson

Hi forum, On a herbaceous stem, possibly Aegopodi

03-06-2025 20:52

±hyaline, dictyosporous
Stefan Blaser

Hello everybody, I didn't get anywhere with this

04-06-2025 14:02

Spiky Asco
Matthew Rozanoff

Good morning,I was wondering if anyone recognizes

01-06-2025 09:37

Octospora
Charles Aron Charles Aron

Hi All, I found this Octospora growing with liver

30-05-2025 10:20

Velutarina
Elisabeth Stöckli

Bonjour, Sur branches mortes de Salix en place (m

20-05-2025 22:15

Asco at the base of decaying fern
Francois Guay Francois Guay

I found this ascomycete at the base of a dead fern

30-05-2025 17:54

Petit disque poilu sur Urtica
Louis DENY

Hello forum!Touvé près de Belfort, altitude 350m

31-05-2025 00:51

Orbilia with fusiform spores
Ethan Crenson

Hello, Last week in New York City this Orbilia wa

30-05-2025 14:40

Black ascomycete.
Josep Torres Josep Torres

Hello.An ascomycete from last May 10th, sprouting

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Clusters of small fungi on bark of Alnus
Dmitry Gavryushin, 21-12-2006 18:36
Dec. 14, 2006, town park, Naro-Fominsk, Moscow region, Russia. Clusters projected from cracks in the bark, size up to 5 mm, separate fruitbodies around 0.5 mm across.
  • message #1158
Dmitry Gavryushin, 21-12-2006 18:37
Re:Clusters of small fungi on bark of Alnus
A more general view.
  • message #1159
Dmitry Gavryushin, 21-12-2006 18:38
Re:Clusters of small fungi on bark of Alnus
What I saw in the microscope (1).
  • message #1160
Dmitry Gavryushin, 21-12-2006 18:38
Re:Clusters of small fungi on bark of Alnus
What I saw in the microscope (2).
  • message #1161
Jacques Trimbach, 21-12-2006 21:15
Re:Clusters of small fungi on bark of Alnus
cf. Tympanis alnea
Dmitry Gavryushin, 21-12-2006 21:33
Re:Clusters of small fungi on bark of Alnus
Many thanks Jacques, I think you are quite right. I have also found out that it occurs on Duschekia fruticosa (Betulaceae) in Taimyr Peninsula (Checklist of fungi and lichenicolous fungi of the Russian Arctic, http://www.binran.ru/infsys/ra_fun/ ).
Hans-Otto Baral, 21-12-2006 22:42
Hans-Otto Baral
Re:Clusters of small fungi on bark of Alnus
Yes that´s a Tympanis. In the case you find living asci (in a section) then you see that the conidia are aggregated in 8 roundish balls in the upper half of the ascus, and so they are ejected. But when you kill the asci then this peculiar arrangement is completely distorted and the conidia fill the whole ascus.

Zotto
Dmitry Gavryushin, 22-12-2006 08:40
Re:Clusters of small fungi on bark of Alnus
Thanks a lot for your comment Zotto. It's said in Nordic Macromycetes that there's another sp. on Alnus, T. hysterioides, but I think it would be difficult to say whether it's T. alnea or T. hysterioides.
Hans-Otto Baral, 22-12-2006 22:18
Hans-Otto Baral
Re:Clusters of small fungi on bark of Alnus
Tympanis is a very difficult genus. The best paper I know is that from Ouelette & Pirozynski. To identify species it is necessary to study the ascospores from which the conidia emerge (septation, germ tubes), which are rather difficult to see within the premature asci - when asci are dead then only by staining.