two forgotten photos of excipulum surface and marginal cells.

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

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

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.

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) :-)