Eusporangiate ferns include the adderstongues (Ophiogossales), Marattiales, and royal ferns (Osmundales), which are to some extent intermediate between leptosporangiate and eusporangiate ferns.

• 厚囊蕨包括蛇舌蕨(箭蕨ophioglossales)，莲座蕨目以及在某种程度上介于薄囊蕨和厚囊蕨之间的皇家蕨（紫萁目osmundales）。