''Tryonia'' 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 subfamily Pteridoideae of the family

Pteridaceae Pteridaceae is a family of ferns in the order Polypodiales, including some 1150 known species in ca 45 genera (depending on taxonomic opinions), divided over five subfamilies. The family includes four groups of genera that are sometimes recogni ...

. Species are native to the east of Brazil and to Uruguay. The genus was

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 ...

by Eric Schuettpelz, Jefferson Prado and Alyssa T. Cochran in

PhytoKeys ''PhytoKeys'' is a peer-reviewed, open-access online and print botanical journal. Its stated goal is "to support free exchange of ideas and information in systematic botany". Printed issues of the journal are available in the libraries of the Unit ...

vol.35 on page 35 in 2014. The genus name of ''Tryonia'' is in honour of Alice F. Tryon (1920–2009), who was an American botanist (mainly

pteridology 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 th ...

). She examined the taxonomy of the fern genera ''

Jamesonia ''Jamesonia'' is a genus of ferns in the subfamily Pteridoideae of the family Pteridaceae. It now includes the formerly separate genus ''Eriosorus''. Description Species of ''Jamesonia'' are terrestrial or grow on rocks. They vary considerably ...

''.

Species

, the ''Checklist of Ferns and Lycophytes of the World'' recognized the following species: *'' Tryonia areniticola'' (Schwartsb. & Labiak) Schuettp., J.Prado & A.T.Cochran *'' Tryonia macrophylla'' A.Rojas *'' Tryonia myriophylla'' (Sw.) Schuettp., J.Prado & A.T.Cochran *'' Tryonia schwackeana'' (Christ) Schuettp., J.Prado & A.T.Cochran *'' Tryonia sellowiana'' (Mett.) Schuettp., J.Prado & A.T.Cochran

References

Pteridaceae Fern genera {{Pteridaceae-stub