Pilularia – Chi Pilularia

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

    Pilularia

    From Wikipedia, the free encyclopedia
     
     
    Pilularia
    Pilularia globulifera - Thomé.jpg  Pilularia - Chi Pilularia 240px Pilularia globulifera   Thom C3 A9
    Pillwort, Pilularia globulifera
    Scientific classification
    Kingdom: Plantae
    Division: Pteridophyta
    Class: Polypodiopsida /
    Pteridopsida (disputed)
    Order: Salviniales
    Family: Marsileaceae
    Genus: Pilularia
    L.
    Species
    See text

    Pilularia or pillworts is a genus of unusual ferns of family Marsileaceae distributed in North Temperate regions, Ethiopian mountains, and the southern hemisphere in Australia, New Zealand, and western South America.

    Depending on the taxonomic revisor, the genus contains between 3 and 6 species of small plants with thread-like leaves, and creeping rhizomes. The sporangia are borne in spherical sporocarps (“pills”) which form in the axils of leaves. Pilularia minuta from SW Europe is one of the smallest of all ferns.

    List of species

    Recent work from Pryer Lab[1] accepted four species of Pilularia, with a fifth, P. novae-zealandiae, being conspecific with P. novae-hollandiae. In addition, another species, P. dracomontana, has been described from South Africa.[2]

    • Pilularia americana A.Braun (American pillwort)
    • Pilularia globulifera L. (pillwort)
    • Pilularia minuta Durieu (least pillwort)
    • Pilularia novae-hollandiae A.Braun (austral pillwort)
    • Pilularia dracomontana N. R. Crouch & J. Wesley-Smith (Dragon-Mountain pillwort)

    References

    1. Jump up^ Nagalingum, Nathalie S.; et al. (2008). “Assessing phylogenetic relationships in extant heterosporous ferns (Salviniales), with a focus on Pilularia and Salvinia” (PDF). Botanical Journal of the Linnean Society. 157 (4): 673–685. doi:10.1111/j.1095-8339.2008.00806.x. Retrieved 8 October 2014.
    2. Jump up^ Crouch, N. R. & J. Wesley-Smith. “Pilularia dracomontana, a new species of pillwort from the Kwazulu-Natal Drakensberg, South Africa”. Retrieved 8 October 2014.
    • UK Biodiversity Action Plan
    • Preston, C.D. & Croft, J.M. (1997). Aquatic Plants in Britain and Ireland. Harley Books, pp. 31–32.

    External links[edit]

    • Pilularia globulifera UK distribution