Monotypic fern genera

Matteuccia is a genus of ferns with one species: Matteuccia struthiopteris (common names ostrich fern, fiddlehead fern, or shuttlecock fern). The species epithet struthiopteris comes from Ancient Greek words () "ostrich" and () "fern".

Didymochlaena is a genus of ferns. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is the only genus in the family Didymochlaenaceae. Alternatively, the family may be placed in a very broadly defined family Polypodiaceae sensu lato as the subfamily Didymochlaenoideae.

Onoclea is a genus of plants in the family Onocleaceae, native to moist habitats in eastern Asia and eastern North America. They are deciduous ferns with sterile fronds arising from creeping rhizomes in spring, dying down at first frost. Fertile fronds appear in late summer. Depending on the authority, the genus contains one to five species.

Mankyua is a monotypic genus and fern in the Ophioglossales. Its only species, M. chejuense, grows only on Jeju Island of South Korea. While this plant is clearly ophioglossoid in the broad sense, its precise cladistic position is uncertain. It has a fused sporangial structure similar to Ophioglossum, but a vegetative structure, with palmately-radiating pinnae, reminiscent of Helminthostachys. It may be a basal offshoot of the ophioglossoid clade sensu stricto.

left|thumb Thyrsopteris is a genus of tree fern. It contains a single living species, Thyrsopteris elegans, endemic to the Juan Fernandez Archipelago off the coast of Chile.

Regnellidium is a monotypic genus of ferns of family Marsileaceae.

Cheiloplecton is a genus of ferns in the subfamily Cheilanthoideae of the family Pteridaceae with a single species Cheiloplecton rigidum, native to Mexico, Guatemala, El Salvador and Honduras.

Pleurosoriopsis is a genus of ferns in the family Polypodiaceae, subfamily Polypodioideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). The genus has only one species, Pleurosoriopsis makinoi, native to China (north-central, south-central and Manchuria), Japan, Korea, and Primorsky Krai in Russia.

Scoliosorus is a genus of ferns in the subfamily Vittarioideae of the family Pteridaceae with a single species, Scoliosorus ensiformis. The species is native to Mexico and Central America.

Loxsoma is a terrestrial fern genus endemic to New Zealand with a single species, Loxsoma cunninghamii.

thumb | right | Hemidictyum marginatum plant Hemidictyum is a genus of ferns with a single species, Hemidictyum marginatum, commonly known as the marginated half net fern. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is the only genus in the family Hemidictyaceae. Alternatively, the family, along with Aspleniaceae sensu stricto, may be placed in a much more broadly defined family Aspleniaceae as the subfamily Asplenioideae.

Xyropteris is a genus of ferns in the family Lindsaeaceae. It has a single described species, Xyropteris stortii, native to Sumatra and Borneo. Some sources do not recognize the genus Xyropteris, placing the species in Lindsaea as Lindsaea stortii.

Neoblechnum is a genus of ferns in the family Blechnaceae, subfamily Blechnoideae, with a single species Neoblechnum brasiliense, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). The genus is accepted in a 2016 classification of the family Blechnaceae, but other sources sink it into a very broadly defined Blechnum, equivalent to the whole of the PPG I subfamily; the species is then known as Blechnum brasiliense. It is called Brazilian dwarf tree fern, red Brazilian tree fern, and red dwarf tree fern.

Gleichenella is a genus of ferns in the family Gleicheniaceae with a single described species, Gleichenella pectinata.

Claytosmunda is a genus of fern. It has only one extant species, Claytosmunda claytoniana (synonym Osmunda claytoniana), the interrupted fern, native to Eastern Asia, Eastern United States, and Eastern Canada.

Brainea is a genus of ferns in the family Blechnaceae, subfamily Blechnoideae, with a single species Brainea insignis, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). The genus is accepted in a 2016 classification of the family Blechnaceae, but other sources sink it into a very broadly defined Blechnum, equivalent to the whole of the PPG I subfamily.

Stromatopteris is a genus of ferns in the family Gleicheniaceae, endemic to New Caledonia. The only species in the genus is Stromatopteris moniliformis. Its closest relative is the more widespread genus Gleichenia.

Llavea is a monotypic genus of fern in the family Pteridaceae. The sole species is Llavea cordifolia. It is often cultivated as an ornamental foliage plant. The genus was named in honour of Pablo de La Llave, a Mexican naturalist.

Cosentinia is a genus of ferns in the subfamily Pteridoideae of the family Pteridaceae with a single species Cosentinia vellea. Its native distribution ranges from the Canary Islands through Europe, northern Africa and Western Asia to the west Himalayas in the Indian subcontinent.