Isoëtes echinospora

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Habitus and growth type

  • Height [m]: 0.05–0.15
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  • Growth form: polycarpic perennial non-clonal herb
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  • Life form: hydrophyte
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Leaf

  • Leaf presence and metamorphosis: leaves present, not modified
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  • Leaf arrangement (phyllotaxis): rosulate
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  • Leaf shape: simple – entire
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  • Stipules: absent
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  • Petiole: absent
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Flower

  • Flowering period [month]: September–October
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Fruit, seed and dispersal

  • Dispersal unit (diaspore): spore
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  • Dispersal strategy: Wolffia (mainly hydrochory)
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  • Myrmecochory: non-myrmecochorous (b)
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Belowground organs and clonality

  • Primary root: absent
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  • Bud bank

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  • Number of buds per shoot at the soil surface (root buds excluded):
  • Number of buds per shoot at a depth of 0–10 cm (root buds excluded):
  • Number of buds per shoot at a depth greater than 10 cm (root buds excluded):
  • Size of the belowground bud bank (root buds excluded):
  • Depth of the belowground bud bank (root buds exluded) [cm]:
  • Number of buds per shoot at the soil surface (root buds included):
  • Number of buds per shoot at a depth of 0–10 cm (root buds included):
  • Number of buds per shoot at a depth greater than 10 cm (root buds included):
  • Size of the belowground bud bank (root buds included):
  • Depth of the belowground bud bank (root buds included) [cm]:

Trophic mode

  • Parasitism and mycoheterotrophy: autotrophic
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  • Carnivory: non-carnivorous
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  • Symbiotic nitrogen fixation: no nitrogen-fixing symbionts
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Taxon origin

  • Origin in the Czech Republic: native
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Ecological indicator values

  • Ellenberg-type indicator values

  • Light indicator value: 7 – half-light plant, mostly occurring at full light, but also in the shade up to about 30% of diffuse radiation incident in an open area
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  • Temperature indicator value: 3 – cool indicator, occurring mainly in subalpine areas
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  • Moisture indicator value: 12 – permanently or almost permanently submerged aquatic plant
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  • Reaction indicator value: 6 – transition between values 5 and 7
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  • Nutrient indicator value: 1 – occurring at nutrient-poorest sites
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  • Salinity indicator value: 0 – not salt tolerant, glycophyte
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Habitat and sociology

  • Occurrence in habitats

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  • 3 Aquatic vegetation

  • 3C Macrophytic vegetation of oligotrophic lakes and pools: 2 – optimum
  • Affinity to the forest environment

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  • Affinity to the forest environment in Thermophyticum: 0 – taxon that does not spontaneously occur in Czech forests
  • Affinity to the forest environment in Mesophyticum and Oreophyticum: 0 – taxon that does not spontaneously occur in Czech forests
  • Diagnostic taxon

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  • Diagnostic taxon of classes: VD Littorelletea uniflorae
  • Diagnostic taxon of alliances: VDA Littorellion uniflorae
  • Diagnostic taxon of associations: VDA01 Isoëtetum echinosporae
  • Constant taxon

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  • Constant taxon of alliances: VDA Littorellion uniflorae
  • Constant taxon of associations: VDA01 Isoëtetum echinosporae

Distribution and frequency

  • Distribution range extension along the continentality gradient: 6
    ?
  • Occurrence frequency in the basic grid mapping cells and quadrants of the basic grid mapping cells: 1, 1
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  • Number of habitats with taxon occurrence in the Czech Republic

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  • Number of narrow habitats in which the taxon occurs: 1
  • Number of narrow habitats in which the taxon has its optimum: 1
  • Number of broad habitats in which the taxon occurs: 1
  • Number of broad habitats in which the taxon has its optimum: 1

Threats and protection

  • Red List 2017 (national categories): C1r – critically threatened taxon, rare
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  • Red List 2017 (IUCN categories): CR – critically endangered
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  • Legal protection: critically threatened taxon
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