Hi,

here I'd need help because I have never seen a pyrenomycet with a combination of these characters. It is a pyrenomycet which I found twice: the first time on 19/2/2010 and the second time four days ago. Both times it grew on the bark of living Salix, some 150 cm above the ground. The first collection was immature and had only hyaline spores while the second collection had brown, two celled spores. However, I observed asci only in the first collection while in the second collection there were only spores.
I am quite sure that these two collections are the same species because they had exactly the same ecology and macroscopical appearance. Furthermore, the immature spores of the second collection looked like the spores of the first collection. The asci (of the first collection) were up to 120 x 30 µm, unitunicate and clavate, without a visible apical apparatus and 8-spored. The spores were always two celled except of one spore with two septa, primarily hyaline, then brown with a darker septum, 32-37,5 x 9,5-12(14) µm. The ascomata were free, rough, black and very soft when wet.

Best wishes and many thanks

Gernot

Here is a picture of the perithecia (of the first collection but they actually looked the same):