I think your fungus bears some resemblance to Oviascoma paludosum in that it has pale ascomata, globose ascospores with spines and grows on wet, graminicolous substrate. However, that species should have ± ovoid ascomata and an ascus wall that does not stain blue in IKI: "Oviascoma may be confused with Boudiera Cooke as both include species with globose asco­ spores having echinulate omament. However, the ascus wall of Boudiera staines blue in iodine, a crucial character which distinguishes Otideaceae from Pezizaceae. Ecology may, also, serve to distinguish these two genera, as species of Boudiera grow directly on soil (Dissing & Schumacher, 1979)." (from the protologue by Yao & Spooner 1996).

Best wishes,
Gernot

merci beaucoup pour votre aide, je ne connaissais pas le genre Oviascoma, je
viens juste de lire le papier de Yao et Spooner et j'ai aussi retrouvé sur le
forum la récolte de Lothar Kriegelsteiner du 24/08/2010. Ma récolte est bien
Oviascoma paludosum, toutefois j'ai une remarque à propos du bleuissement de la
paroi des asques car j'ai noté ce bleuissement avec observation d'abord
dans le liquide de Baral, ensuite traitement à la potasse et de nouveau liqUide
de Baral, voir les photos jointes.

André

Dear Gernot and Björn,

many thanks for your help, I didn't know the genus Oviascoma, I have just read Yao and Spooner's paper
and I also found on the forum Lothar Kriegelsteiner's collection of 24/08/2010.
Oviascoma paludosum is right, however I have a remark about the bluing of the
ascus walls ; I noted with observation at first in Baral's liquid, then
treatment in potassium and again Baral's liquid that ascus walls stain blue ! (new photos)