Hello everybody,

do not worry about the Lasionectria, I will make some sections tomorrow because I did not have the time for it today.

I had to look for something else growing on attached Rhododendron twigs. It has very small perithecia about 0,2-0,4 mm, which remind me on Cryptosporella species. It seems to be characteristic with its allantoid, diatrype-like but hyaline spores, lying in biseriate asci. First I thought the perithecia are immature because I had seen only very prominent paraphyses as you can see on the photos. But than I saw small asci between them, with even smaller spores inside. 

I did not see any apical structures of the asci and the spores seem to be non-septate. There is no reaction with Barals/Lugol.

Any idea?

regards,
björn