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Aspleniaceae

 
Aspleniaceae

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Aspleniaceae



 
 
The Aspleniaceae (spleenworts) is a family of fern
Fern

A fern is any one of a group of about 20,000 species of plants classified in the phylum or division Pteridophyta, also known as Filicophyta....
s, included in the order Polypodiales
Polypodiales

The order Polypodiales encompasses the major lineages of polypod ferns, which comprise more than 80% of today's fern species. They are found in many parts of the world including tropical, semitropical and temperate areas....
 or in some classifications as the only family in the order Aspleniales.

Members of the family all have intramarginal, linear sori
Sorus

A sorus is a cluster of sporangium.In fungi and lichens, the sorus is surrounded by an external layer. In some red algae it may take the form of a depression into the thallus....
 with a flap-like indusium arising along one edge. Most pteridologists today consider this family of consisting of just one to three genera. Others still maintain segregate genera such as Phyllitis and Ceterach; however, the species segregated into these genera all hybridize readily with undisputed Asplenium species.






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Encyclopedia


The Aspleniaceae (spleenworts) is a family of fern
Fern

A fern is any one of a group of about 20,000 species of plants classified in the phylum or division Pteridophyta, also known as Filicophyta....
s, included in the order Polypodiales
Polypodiales

The order Polypodiales encompasses the major lineages of polypod ferns, which comprise more than 80% of today's fern species. They are found in many parts of the world including tropical, semitropical and temperate areas....
 or in some classifications as the only family in the order Aspleniales.

Members of the family all have intramarginal, linear sori
Sorus

A sorus is a cluster of sporangium.In fungi and lichens, the sorus is surrounded by an external layer. In some red algae it may take the form of a depression into the thallus....
 with a flap-like indusium arising along one edge. Most pteridologists today consider this family of consisting of just one to three genera. Others still maintain segregate genera such as Phyllitis and Ceterach; however, the species segregated into these genera all hybridize readily with undisputed Asplenium species. A recent phylogenenetic study of Aspleniaceae (Murukami et al. 1999) shows that species segregated as Camptosorus and Neottopteris are nested within Asplenium and recommends that they be included in that genus, but suggests that Hymenasplenium (including Boniniella) and Phyllitis are distantly related to other Asplenium species and should be recognized at the generic level.

Genera
  • Asplenium
    Asplenium

    Asplenium is a genus of about 700 species of ferns, often treated as the only genus in the family Aspleniaceae, though other authors consider e.g....
  • Hymenasplenium
  • Phyllitis