| Oleandra | |
|---|---|
 | |
| Oleandra distenta | |
Scientific 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 | |
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Oleandra is a genus offerns. In thePteridophyte Phylogeny Group classification of 2016 (PPG I), it is the only genus in the familyOleandraceae, which is placed in suborderPolypodiineae, orderPolypodiales.[1] Alternatively, the family may be placed in a very broadly defined familyPolypodiaceaesensu lato as the subfamilyOleandroideae.[2]
The genus contains about 15 species.[1] Most are erect ground ferns or scandentepiphytes that start from the ground. The lamina (leafy area of thefronds) are simple or pinnate, and the individual pinnae are articulate to the rachis. Thesporangia are contained in discrete round sori in a single row on either side of the midrib of the fronds.[citation needed]
The following cladogram for the suborderPolypodiineae (eupolypods I), based on the consensus cladogram in thePteridophyte Phylogeny Group classification of 2016 (PPG I),[1] shows a likelyphylogenetic relationship between Oleandraceae and the other families of the clade.
| External phylogeny[1] | Internal phylogeny[3][4] |
|---|---|
Classification ofArchaeplastida orPlantaes.l. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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