Topic summary
Pseudothecium
Extracted from the Wikipedia article Ascocarp.
Pseudothecium
This is similar to a perithecium, but the asci are not regularly organised into a hymenium and they are bitunicate, having a double wall that expands when it takes up water and shoots the enclosed spores out suddenly to disperse them. Example species are apple scab (Venturia inaequalis) and the horse chestnut disease Guignardia aesculi.