''Cyclosorus'' is a genus of

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 exce ...

s in the family

Thelypteridaceae Thelypteridaceae is a family of about 900 species of ferns in the order Polypodiales. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is placed in the suborder Aspleniineae. Alternatively, the family may be submerged in a ...

, subfamily Thelypteridoideae, 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 relatio ...

classification of 2016 (PPG I). Other sources sink ''Cyclosorus'' into a very broadly defined genus ''

Thelypteris ''Thelypteris'' (maiden ferns) is a genus of ferns in the subfamily Thelypteridoideae, family Thelypteridaceae, order Polypodiales. Two radically different circumscriptions of the genus are in use . In the Pteridophyte Phylogeny Group classific ...

'', or expand the genus to include other genera which PPG I keeps separate. Thus the online ''Flora of China'' suggests there are about 250 species compared to the two species suggested in PPG I. There are also fossil species known from the Eocene of South China and the Quaternary of Australia. The genus is named from the Greek, referring to the circular sori.Les Robinson - Field Guide to the Native Plants of Sydney, page 320

Species

, the ''Checklist of Ferns and Lycophytes of the World'' accepted the following extant species, although noting that only two to four probably belonged in the genus '' sensu stricto'', the rest needing in future to be distributed among other genera. *'' Cyclosorus angustipinnatus'' C.Chr. & Tardieu ex Tardieu *'' Cyclosorus attenuatus'' Ching ex K.H.Shing *'' Cyclosorus cuneatus'' Ching ex K.H.Shing *'' Cyclosorus exindusiatus'' (W.H.Wagner) W.H.Wagner *''

Cyclosorus interruptus ''Cyclosorus interruptus'', the Hottentot fern or swamp shield-fern, is a fern in the family Thelypteridaceae. It is native to the tropics and subtropics in many parts of the world. In the New World, it is found from Mexico to Argentina, and in t ...

'' (Willd.) H.Itô *'' Cyclosorus jinghongensis'' Ching ex K.H.Shing *'' Cyclosorus lenormandii'' (C.Chr.) Ching *''

Cyclosorus molundensis ''Cyclosorus'' is a genus of ferns in the family Thelypteridaceae, subfamily Thelypteridoideae, in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). Other sources sink ''Cyclosorus'' into a very broadly defined genus ''Thelypteris' ...

'' (Brause) Pic. Serm. *'' Cyclosorus nanxiensis'' Ching ex K.H.Shing *'' Cyclosorus parvifolius'' Ching *'' Cyclosorus pygmaeus'' Ching & C.F.Zhang *'' Cyclosorus shimenensis'' K.H.Shing & C.M.Zhang *'' Cyclosorus striatus'' (Schum.) Ching *''

Cyclosorus subacutus ''Cyclosorus'' is a genus of ferns in the family Thelypteridaceae, subfamily Thelypteridoideae, in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). Other sources sink ''Cyclosorus'' into a very broadly defined genus ''Thelypteris' ...

'' Ching *''

Cyclosorus thailandicus ''Cyclosorus'' is a genus of ferns in the family Thelypteridaceae, subfamily Thelypteridoideae, in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). Other sources sink ''Cyclosorus'' into a very broadly defined genus ''Thelypteris' ...

'' S.Linds. *''

Cyclosorus tottus ''Cyclosorus'' is a genus of ferns in the family Thelypteridaceae, subfamily Thelypteridoideae, in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). Other sources sink ''Cyclosorus'' into a very broadly defined genus ''Thelypteris' ...

'' (Thunb.) Pic. Serm. *''

Cyclosorus wulingshanensis ''Cyclosorus'' is a genus of ferns in the family Thelypteridaceae, subfamily Thelypteridoideae, in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). Other sources sink ''Cyclosorus'' into a very broadly defined genus ''Thelypteris' ...

'' C.M.Zhang

References

External links

* *
''Cyclosorus''
at Tropicos Thelypteridaceae Ferns of Asia Ferns of Australasia Fern genera {{Polypodiales-stub