Sentence Examples with the word perithecium

We find two chief types of fruit bodies in the lichens, the perithecium and apothecium; the first when the fungal element is a member of the Pyrenomycetes division of the Ascomycetes, the second when the fungus belongs to the Discomycetes division.

Ascus from perithecium containing six spores, X30o.

The perithecium is very constant in form and since the gonidia take no part variations are of value in classification some more details may be added.