Herbario Virtual del Mediterráneo Occidental

Àrea de Botànica, Departament de Biologia, Universitat de les Illes Balears

Isoetes histrix Bory


Genus : Isoetes

Isoetes histrix Bory

    Province distribution : Balearic Islands. Gerona.

    Distribution in the islands : Mallorca. Minorca.

    General distribution : Holoartica

    Flowering time : January. February. March. April. May.

    Life-forms : Geophyte.

    Habitat : Ponds on siliceous substrates.

    IUCN Category : En peligro

    Characteristics : A small plant without visible stems forms a leaf rosette with linear leaves that grow prostrate along the ground; underground forms a small trunk from which emerge the roots and roots. Given that this is a terraphyte, it forms no kind of flower, at the leaf base forms a sort of small cavities in which the sporangium can be found. Identification has to be observing the resulting spores, which for these species are spinulate. This character permits it to be differentiated from Isoetes duriei, which is morphologically similar, but has alveolate spores (the Isoetes have two spore types, this character refers to the female spores, which are large, up to 0,8 mm, and such can be seen by the naked eye). Lives in wet areas on substrates absent in carbonates.

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Patrocinador: Fundació Sa Nostra