Hello,

I have found an lophiostomoid fungus on dead stems of Aruncus (dioicus) with the following macro- und microscopical features:

Fruitbody lophiostomoid, ca. 0,2-0,5x0,1-0,2 mm, black.
Spores 25-30x5-6,5 µm, with one central septe, each cell with 2-4 bigger and a few smaller guttules, hyaline with pale green-brownish color, endings pointed.
Asci 70-100x5-9 µm, with 8 spores (biseriate), bitunicate.
Paraphyses hyaline, 2-4 µm.

Perhaps someone can help with determination, I think it is Lophiostoma macrostomum, but is Aruncus a substrate for this species? I don't have any good literature about this dothideo-families :D

regards and thanks for help,
Kazuya