Oleandra

Oleandra is a genus of ferns. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is the only genus in the family Oleandraceae, which is placed in suborder Polypodiineae, order Polypodiales.[1] Alternatively, the family may be placed in a very broadly defined family Polypodiaceae sensu lato as the subfamily Oleandroideae.[2]

Oleandra
Oleandra distenta
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Division: Polypodiophyta
Class: Polypodiopsida
Order: Polypodiales
Suborder: Polypodiineae
Family: Oleandraceae
Ching ex Pic.Serm.
Genus: Oleandra
Cav.
Type species
Oleandra neriiformis
Cavanilles
Synonyms
  • Ophiopteris Reinwardt 1824
  • Neuronia Don 1825

The genus contains about 15 species.[1] Most are erect ground ferns or scandent epiphytes that start from the ground. The lamina (leafy area of the fronds) are simple or pinnate, and the individual pinnae are articulate to the rachis. The sporangia are contained in discrete round sori in a single row on either side of the midrib of the fronds.

Phylogeny

The following cladogram for the suborder Polypodiineae (eupolypods I), based on the consensus cladogram in the Pteridophyte Phylogeny Group classification of 2016 (PPG I),[1] shows a likely phylogenetic relationship between Oleandraceae and the other families of the clade.

External phylogeny[1] Internal phylogeny[3][4]
Polypodiineae (eupolypods I)

Didymochlaenaceae

Hypodematiaceae

Dryopteridaceae

Nephrolepidaceae

Lomariopsidaceae

Tectariaceae

Oleandraceae

Davalliaceae

Polypodiaceae

Oleandra

O. distenta

O. articulata

O. decurrens

O. pilosa

O. neriiformis

O. pistillaris

O. sibbaldii

O. wallichii

O. cumingii

O. musifolia

References

  1. PPG I (2016), "A community-derived classification for extant lycophytes and ferns", Journal of Systematics and Evolution, 54 (6): 563–603, doi:10.1111/jse.12229, S2CID 39980610
  2. Christenhusz, Maarten J.M. & Chase, Mark W. (2014). "Trends and concepts in fern classification". Annals of Botany. 113 (9): 571–594. doi:10.1093/aob/mct299. PMC 3936591. PMID 24532607.
  3. Nitta, Joel H.; Schuettpelz, Eric; Ramírez-Barahona, Santiago; Iwasaki, Wataru; et al. (2022). "An Open and Continuously Updated Fern Tree of Life". Frontiers in Plant Science. 13: 909768. doi:10.3389/fpls.2022.909768. PMC 9449725. PMID 36092417.
  4. "Tree viewer: interactive visualization of FTOL". FTOL v1.3.0. 2022. Retrieved 12 December 2022.


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