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28-11-2020 19:54

Blasco Rafael Blasco Rafael

Hola, He recogido este Hypoxylon creo puede ser ru

24-11-2020 14:46

Thomas Læssøe

see: https://svampe.databasen.org/observations/101

28-11-2020 17:00

Edvin Johannesen Edvin Johannesen

Apothecia short-stipitate, pale yellow, 2-5 mm, or

26-11-2020 16:17

Blasco Rafael Blasco Rafael

Hola,  Alguno de Ustedes tiene documentación o a

27-11-2020 11:34

DirkW DirkW

salut a tous,on dead stem of indet. herbaceous pla

27-11-2020 16:48

Andgelo Mombert Andgelo Mombert

Bonsoir, Je suis intéressé par de la documentat

26-11-2020 17:58

Gérard MELARD

Bonjour à chacune et à chacun,Je vous soumets un

27-11-2020 11:16

Joaquin Martin

Hi,I found this little ascomycete on rubus, I thin

11-02-2017 13:39

Nihad Omerovic

Hello,Loking for confirmation or opinions on this

26-11-2020 20:43

Marek Capoun Marek Capoun

Hello everybody, I need help with the determinatio

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Cenangiaceae? on Swida
Viktorie Halasu, 22-11-2020 11:50
Viktorie HalasuHello, 

I would welcome any advice with this discomycete. Sessile, gray, ca. 0.5-0.75 mm diam, on attached dead < 1 cm thick twig of Swida sp. hanging about 1,75 m above ground, associated with a pyrenomycetous anamorph (?). Spores already 1-3-septate in asci, most of them germinating. 

Riparian forest (Populus, Salix, Tilia) along a larger river, rather shaded from draught. Czech Rep., 250 m a.s.l.  
I'm not sure where to place it, Cenangiaceae? 

Thanks a lot in advance. 
Viktorie
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Viktorie Halasu, 22-11-2020 12:10
Viktorie Halasu
Re : Cenangiaceae? on Swida
two forgotten photos of excipulum surface and marginal cells.
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Hans-Otto Baral, 22-11-2020 18:25
Hans-Otto Baral
Re : Cenangiaceae? on Swida
Ha, interesting!

I am sure this is something of the Belonioum betulinum group. With Swida you mean Cornus?

Which species occurs there?

It is a Pezizellaceae, and I have it in Calycellina. Earler I named it Calycellina "chalarae".

But the two folders show multiguttulate spores which get 3-septate at maturity (before discharge.

For the hemiamyloid one I have an unpzblished ITS sequence made by Joey Tanney, so if you triy one from your sample we could compare.

Zotto
Viktorie Halasu, 22-11-2020 23:19
Viktorie Halasu
Re : Cenangiaceae? on Swida
Dear Zotto,

thank you very much, that's exactly where I forgot to look, Calycellina. I still have this notion about Calycellina only having hairs with whip-like apex, yet I've already seen with "C". ochracea that it's not always the case. 

The spores are mostly 1septate, some 2s and I think one was 3s. I've also found that exudate on the hairs. 

Yes, Swida = Cornus now. I've only noticed the characteristic leaves and green bark in the field. Floristic database lists both C. mas and C. sanguinea within 3km range. I'll check the literature whether it's possible to distinguish them without flowers or fruits. As for DNA, the sample was rather contaminated byt various conidia, I plan to go there again so I'll try to recollect it in better shape. 

Thank you.
Viktorie
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Hans-Otto Baral, 23-11-2020 08:55
Hans-Otto Baral
Re : Cenangiaceae? on Swida
No, Phialina was that with whip-like hairs, and typical calycellina without.

I suppose your fungus ejects non-septate spores while the two in my folders eject 1-3-septate spores.

So Swida is an ancient name used in Czechia?
Viktorie Halasu, 23-11-2020 14:29
Viktorie Halasu
Re : Cenangiaceae? on Swida
Thank you for explanation.
 
Some Cornus species (C. sanguinea, alba etc.) used to be ordered systematically into genus Swida (several times in and out, during the history) and still in 1997 in the huge book series Flora of Czech Rep. it was recognised as separate genus (blueish or white fruits with globose pit = Swida, red fruits with ovoid to fusiform pit = Cornus + Cynoxylon). Although the wider concept of Cornus has probably been generally accepted by now, this distinction still exists in their czech botanical names. I just forgot that it's the same. 

There seem to be useful differences between species in the trichomes on leaf surface. I'll let you know if I'm able to determine the host better. 
Viktorie
Hans-Otto Baral, 23-11-2020 16:44
Hans-Otto Baral
Re : Cenangiaceae? on Swida
Maybe the nerves may aid in distinction.

Swida is possibly generally not edible?
Viktorie Halasu, 23-11-2020 16:47
Viktorie Halasu
Re : Cenangiaceae? on Swida
I don't know. At least Cornus mas should be, my granddad used to eat it as child (maybe they made a marmalade too). I didn't try it yet.
Hans-Otto Baral, 23-11-2020 16:49
Hans-Otto Baral
Re : Cenangiaceae? on Swida
There is a cultivated form of C. mas with rather large fruits. I detected it this year and we eat it since several weeks when it turned mature (deep red) :-)