Tên Khoa học: Plagiogyriaceae
Tên tiếng Anh:
Tên tiếng Việt: Ráng bình chu
Tên khác:

Plagiogyria is a genus of fern in family Plagiogyriaceae. Ferns of this genus present two kind of fronds, the fertile ones longer than the sterile. These ferns are found on forest soils in mountainous  areas of tropical and subtropical regions, mostly in Asia - but also in America.

The genus comprises about 50 species (according to Flora of Taiwan. Some other floras indicate lower figures) among which the following, assessed as endangered in the IUCN Red List:

    * Plagiogyria assurgens, H.Christ