Overview
Eusporangiate ferns lack a specialised mechanism for opening the sporangium, in which the spores are made.
Eusporangiate ferns evolved before leptosporangiate ferns.
Eusporangiate ferns include some typical-looking ferns such as Ptisana (Marattia) alongside some rather odd-looking plants such as Tmesipteris (fork ferns), Psilotum (whisk ferns), Equisetum (horsetails), Botrychium, and Ophioglossum (adder's tongue ferns).