Hi Nicolas, G.ruscicola is different. By the way, it is very common in my area, it is easy to find, the first time I found it several years ago, Lechat told me that he was preparing a paper about it. I saw them now as well, but on a different branch.

Hi Savic,

I'm sure you are right with Fusicolla sp., but I cannot name the species - No collections are known from Ruscus as far as I know....

I found Fussicola ascomata on various substrates in the past (they seem to like it when other other Nectriaceae are present), but often I could not name them, even when I had a good quality ITS sequence. 
I guess the situation might be similar to Fusarium species with gibberella-like anamorphs, in that there could be more cryptic species in a wide range of ecological niches (and with overlapping teleomorph morphology) than have been described so far. There are also several species that are only known from their asexual states.

Sorry, I haven't been much help :(

Cheers,
Nick

Thanks Nick, you helped a lot, you confirmed what I thought :(