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Published In: Species Plantarum 2: 1099. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 11/30/2011)
Acceptance : Accepted
Project data     (Last Modified On 12/7/2011)
Notes:

About 60 species in tropical and temperate zones.


 

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Perennial. Rhizome slender, rooting at nodes. Sterile leaves fasciculate, long-petioled; blade of 2 contiguous pairs of opposite, obovate-cuneate leaflets with flabellate anastomosing venation. Sporocarp leathery, sessile or stipitate, globular-ovoid to compressed, with truncate base, divided by membranous partitions (indusia) into two series of transverse compartments, each with a single sorus. Macro- and microsporangia intermixed in the same sorus; mature sporocarp dehiscent under water along the ventral suture into 2 valves and liberating a gelatinous ring which opens and turns into a long filament, bearing the sori.

 

 
 
 
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