''Oeosporangium'' 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 except t ...

s in the subfamily

Cheilanthoideae Cheilanthoideae is one of the five subfamilies of the fern family Pteridaceae. The subfamily is thought to be monophyletic, but some of the genera into which it has been divided are not, and the taxonomic status of many of its genera and species ...

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 ...

. The genus has not always been recognized. 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) it was included in ''Allosorus'' (a genus since subsumed into ''

Aleuritopteris ''Aleuritopteris'' is a genus of ferns in the Cheilanthoideae subfamily of the Pteridaceae. As with some other genera of the Cheilanthoideae, molecular phylogenetic studies have suggested that it is not monophyletic, and so may need to be circ ...

''). It was accepted by the ''Checklist of the Ferns and Lycophytes of the World'' . As

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 ...

there, the genus is native to the

Old World The "Old World" is a term for Afro-Eurasia that originated in Europe , after Europeans became aware of the existence of the Americas. It is used to contrast the continents of Africa, Europe, and Asia, which were previously thought of by the ...

Species

, the ''Checklist of Ferns and Lycophytes of the World'' recognized the following species: *'' Oeosporangium belangeri'' (Bory) Fraser-Jenk. *'' Oeosporangium chinense'' (Baker) Fraser-Jenk. *'' Oeosporangium chusanum'' (Hook.) Fraser-Jenk. *'' Oeosporangium contiguum'' (Baker) Fraser-Jenk. *'' Oeosporangium coriaceum'' (Decne.) Fraser-Jenk. & Pariyar *'' Oeosporangium delicatulum'' (Tagawa & K.Iwats.) Fraser-Jenk. & Pariyar *'' Oeosporangium elegans'' (Poir.) Fraser-Jenk. & Pariyar *'' Oeosporangium fragile'' (Hook.) Fraser-Jenk. *'' Oeosporangium guanchicum'' (Bolle) Fraser-Jenk. & Pariyar *'' Oeosporangium hancockii'' (Baker) Fraser-Jenk. *'' Oeosporangium hispanicum'' (Mett.) Fraser-Jenk. & Pariyar *'' Oeosporangium insigne'' (Ching) Fraser-Jenk. *'' Oeosporangium kuhnii'' (Milde) Fraser-Jenk. *''

Oeosporangium mairei ''Oeosporangium'' is a genus of ferns in the subfamily Cheilanthoideae of the family Pteridaceae. The genus has not always been recognized. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I) it was included in ''Allosorus'' (a ge ...

'' (Brause) Fraser-Jenk. *'' Oeosporangium nitidulum'' (Hook.) Fraser-Jenk. *'' Oeosporangium pteridioides'' (Reichard) Fraser-Jenk. & Pariyar *'' Oeosporangium patulum'' (Baker) Fraser-Jenk. *''

Oeosporangium pauperculum ''Oeosporangium'' is a genus of ferns in the subfamily Cheilanthoideae of the family Pteridaceae. The genus has not always been recognized. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I) it was included in ''Allosorus'' (a ge ...

'' (Christ) Fraser-Jenk. & Pariyar *'' Oeosporangium persica'' (Bory) Vis. *'' Oeosporangium pulchellum'' (Bory ex Willd.) Fraser-Jenk. & Pariyar *''

Oeosporangium smithii ''Oeosporangium'' is a genus of ferns in the subfamily Cheilanthoideae of the family Pteridaceae. The genus has not always been recognized. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I) it was included in ''Allosorus'' (a ge ...

'' (C.Chr.) Fraser-Jenk. & Pariyar *''

Oeosporangium stramineum ''Oeosporangium'' is a genus of ferns in the subfamily Cheilanthoideae of the family Pteridaceae. The genus has not always been recognized. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I) it was included in ''Allosorus'' (a ge ...

'' (Ching) Fraser-Jenk. *'' Oeosporangium subvillosum'' (Hook.) Fraser-Jenk. & Pariyar *'' Oeosporangium nudiusculum'' (R.Br.) comb. ined. *'' Oeosporangium tenuifolium'' (Burm.f.) Fraser-Jenk. & Pariyar *'' Oeosporangium thwaitesii'' (Mett. ex Kuhn) Fraser-Jenk. *'' Oeosporangium tinaei'' (Tod.) Fraser-Jenk. *'' Oeosporangium tirajanae'' (T.S.Velázquez) comb. ined. *'' Oeosporangium trichophyllum'' (Baker) Fraser-Jenk. *'' Oeosporangium velutinum'' (Tardieu & C.Chr.) Fraser-Jenk. *'' Oeosporangium viride'' (Forsk.) Fraser-Jenk. & Pariyar *'' Oeosporangium yunnanense'' (Ching) Fraser-Jenk. & Pariyar

References

Pteridaceae Fern genera {{Pteridaceae-stub