Drynarioideae is a

subfamily In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end subfamily botanical names with "-oideae", and zoologi ...

of the

fern A fern (Polypodiopsida or Polypodiophyta ) is a member of a group of vascular plants (plants with xylem and phloem) that reproduce via spores and have neither seeds nor flowers. The polypodiophytes include all living pteridophytes except t ...

family

Polypodiaceae Polypodiaceae is a family of ferns. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), the family includes around 65 genera and an estimated 1,650 species and is placed in the order Polypodiales, suborder Polypodiineae. A broader ...

in the

Pteridophyte Phylogeny Group The Pteridophyte Phylogeny Group, or PPG, is an informal international group of systematic botanists who collaborate to establish a consensus on the classification of pteridophytes (lycophytes and ferns) that reflects knowledge about plant relation ...

classification of 2016 (PPG I). The subfamily is also treated as the tribe Drynarieae within a very broadly defined family Polypodiaceae '' sensu lato''. In either case, it includes the previously separated tribe Selligueeae. Drynarioideae combines the drynarioid and selligueoid ferns, which have been considered to be tribes (Drynarieae and Selligueeae) when the family Polypodiaceae was very broadly circumscribed. The genus count of neither of original tribes was certain, but the combined total could be at least nine.Christenhusz ''et al.'': A linear sequence of extant families and genera of lycophytes and ferns
''Phytotaxa'' 19: 7-54. (18 Feb. 2011) The

classification of 2016 (PPG I) recognizes six genera. Other sources accept fewer. , the ''Checklist of Ferns and Lycophytes of the World'' (''CFLW'') sank ''Arthromeris'', ''Paraselliguea'' and ''Polypodiopteris'' into a more broadly

circumscribed In geometry, the circumscribed circle or circumcircle of a polygon is a circle that passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius. Not every polyg ...

''Selliguea''. ''

Plants of the World Online Plants of the World Online (POWO) is an online database published by the Royal Botanic Gardens, Kew. It was launched in March 2017 with the ultimate aim being "to enable users to access information on all the world's known seed-bearing plants by ...

'' in addition placed the sole species of ''Gymnogrammitis'' in ''Selliguea'', and recognized ''Drynaria'' rather than ''Aglaomorpha''. The table below summarizes these approaches.

References

* Plant subfamilies {{polypodiaceae-stub