| Leather ferns | |
|---|---|
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| Acrostichum aureum, showing sori | |
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| A. aureum growing in Indonesia | |
Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Order: | Polypodiales |
| Family: | Pteridaceae |
| Subfamily: | Parkerioideae |
| Genus: | Acrostichum L. |
| Type species | |
| Acrostichum aureum | |
| Synonyms | |
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Acrostichum is afern genus in theParkerioideae subfamily of thePteridaceae.[1] It was one of the originalpteridophyte genera delineated byLinnaeus. It was originally drawn very broadly, including all ferns that had sori apparently "acrostichoid", or distributed in a uniform mass across the back of the frond, rather than organized in discrete sori.[2] This led Linnaeus to include such species asAsplenium platyneuron in the genus, because the specimen he received had sori so crowded that it appeared acrostichoid.
SinceAcrostichum aureum is regarded as the type for the genus, it is now narrowly circumscribed only to the natural genus of three species, that are allied to the genusCeratopteris. They are collectively known as theleather ferns orleather swamp ferns, genus members commonly being found in swamps. The species ofAcrostichum are massive ferns, with fronds up to 3.7 m (12 ft) tall, that depend on a semi-aquatic existence. They do not withstand prolonged immersion, but require wet roots. The speciesAcrostichum aureum is known to have a high saltwater tolerance, growing inmangroves.
Phylogeny ofAcrostichum.
| Nitta et al. 2022[3] and Fern Tree of life[4] | |||||||||||||||
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Other species:
Classification ofArchaeplastida orPlantaes.l. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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