Acrostichum – Chi Acrostichum

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    Acrostichum - Chi Acrostichum Acrostichum genus freshwater aquarium plants 600 x 600
     
    Acrostichum – Chi Acrostichum
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    Species from this Genus – Các cây trong Chi này:

    Acrostichum

    From Wikipedia, the free encyclopedia
     
     
    Leather ferns
    Acrostichum aureum-wk-sori.jpg  Acrostichum - Chi Acrostichum 220px Acrostichum aureum wk sori
    Acrostichum aureum, showing sori
    Scientific classification
    Kingdom: Plantae
    Division: Pteridophyta
    Class: Pteridopsida
    Order: Polypodiales
    Family: Pteridaceae
    Subfamily: Ceratopteridoideae
    Genus: Acrostichum
    L.
    Synonyms
    Chrysodium Fée

    Acrostichum - Chi Acrostichum 220px Acros aure 080627 0097 smlu

     

    A. aureum growing in Indonesia

    Acrostichum is a fern genus in the Ceratopteridoideae subfamily of the Pteridaceae.[1] It was one of the original pteridophyte genera delineated by Linnaeus. 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 as Asplenium platyneuron in the genus, because the specimen he received had sori so crowded that it appeared acrostichoid.

    Since Acrostichum 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 genus Ceratopteris. They are collectively known as the leather ferns or leather swamp ferns, genus members commonly being found in swamps. The species of Acrostichum are massive ferns, with fronds up to 12 feet (3.5 meters) tall, that depend on a semi-aquatic existence. They do not withstand prolonged immersion, but require wet roots. The species Acrostichum aureum is known to have a high saltwater tolerance, growing in mangroves.

    Species

    • Acrostichum aureum L.
    • Acrostichum danaeifolium (Langsd.) Fisch.
    • Acrostichum speciosum Willd.
    • Acrostichum preaureum fossil plant.

    References

    1. Jump up^ Christenhusz et al., 2011 Maarten J. M. Christenhusz, Xian-Chun Zhang & Herald Schneider: “A linear sequence of extant families and genera of lycophytes and ferns,” Phytotaxa, 19: 7-54 (18 Feb. 2011)
    2. Jump up^ Coulter, John (1917). The Botanical Gazette (volume LXIV). p. 347. Retrieved 26 June 2016.
    • World species list for Acrostichum: http://homepages.caverock.net.nz/~bj/fern/acrostichum.htm
    • C.Michael Hogan. 2010. Fern. Encyclopedia of Earth. National council for Science and the Environment. Washington, DC