These dark, erumpent, somewhat flaky apothecia, 1-3 mm in diameter when dry, were growing on thin twigs of Salix at 1100 m alt. in Western Norway mid-June. They never opened, even after rehydration. Dark outer tissue layer (textura intricata/oblita) and a thicker, whitish middle layer. Asci with croziers, IKI-. I have not seen mature ascospores, but I think I saw small spherical spores (conidia or secondary ascospores) in a previous mount. Paraphyses filiform, extending far beyond the asci. Asci ca. 60-70 micr. long.

I am pretty sure I have seen this before, but I am not able to recall what it is.  Any suggestions?

(I have used phase contrast on three images in order to vizualise the ascus base.)

Thanks.