The general feature in all is the presence of a perithecium, which contains and encloses the hymenium, and at length opening by a pore or ostiolum at the apex.
"Fungi: Their Nature and Uses"
Mordecai Cubitt Cooke
The spores are produced on slender threads springing from the inner wall of the perithecium, and, when mature, are expelled from an orifice at the apex.
"Fungi: Their Nature and Uses"
Mordecai Cubitt Cooke
The hymenium lines the inner walls of the perithecium, and forms a gelatinous nucleus, consisting of asci and paraphyses.
"Fungi: Their Nature and Uses"
Mordecai Cubitt Cooke