royal fern

同根派生

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）。
The royal palace was filled with intrigue.
皇宫中充满了勾心斗角。
An area overgrown with this fern.
欧洲蕨林被这种蕨覆盖的地带
The trunk of a palm or tree fern.
棕榈树或树蕨的树干
This document carries the royal seal.
这份文件上盖有王室印章。