Elatine alsinastrum

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Habitus and growth type

  • Height [m]: 0.1–0.8
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  • Growth form: annual herb
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  • Life form: therophyte (hydrophyte)
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  • Life strategy: SR – stress-tolerator/ruderal
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Leaf

  • Leaf presence and metamorphosis: leaves present, not modified
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  • Leaf arrangement (phyllotaxis): verticillate
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  • Leaf shape: simple – entire
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  • Stipules: present
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  • Petiole: absent
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  • Leaf life span: evergreen
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  • Leaf anatomy: helomorphic
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Flower

  • Flowering period [month]: June–September
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  • Flower colour: green
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  • Flower symmetry: actinomorphic
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  • Perianth type: calyx and corolla
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  • Perianth fusion: free
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  • Calyx fusion: synsepalous
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  • Inflorescence type: flores solitarii
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  • Dicliny: synoecious
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  • Generative reproduction type: facultative autogamy
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  • Pollination syndrome: selfing
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Fruit, seed and dispersal

  • Fruit type: dry fruit – capsule
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  • Fruit colour: brown
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  • Reproduction type: by seed/spores and vegetatively
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  • Dispersal unit (diaspore): seed
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  • Dispersal strategy: Sparganium (mainly autochory and hydrochory)
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  • Myrmecochory: non-myrmecochorous (b)
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Belowground organs and clonality

  • Shoot metamorphosis: stolon
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  • Storage organ: stolon
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  • Shoot life span (cyclicity): monocyclic shoots prevailing
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  • 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): 10
  • Number of buds per shoot at a depth of 0–10 cm (root buds excluded): 0
  • Number of buds per shoot at a depth greater than 10 cm (root buds excluded): 0
  • Size of the belowground bud bank (root buds excluded): 10
  • Depth of the belowground bud bank (root buds exluded) [cm]: 1
  • Number of buds per shoot at the soil surface (root buds included): 10
  • Number of buds per shoot at a depth of 0–10 cm (root buds included): 0
  • Number of buds per shoot at a depth greater than 10 cm (root buds included): 0
  • Size of the belowground bud bank (root buds included): 10
  • Depth of the belowground bud bank (root buds included) [cm]: 1

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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Karyology

  • Chromosome number (2n): 36
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  • Ploidy level (x): 4
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  • 2C genome size [Mbp]: 801.2
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  • 1Cx monoploid genome size [Mbp]: 200.3
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  • Genomic GC content: 40.2 %
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Taxon origin

  • Origin in the Czech Republic: native
    ?

Ecological indicator values

  • Ellenberg-type indicator values

  • Light indicator value: 8 – light plant, only exceptionally occurring at less than 40% of diffuse radiation incident in an open area
    ?
  • Temperature indicator value: 7 – heat indicator, occurring in relatively warm lowlands
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  • Moisture indicator value: 9 – wetness indicator, focus on often soaked, poorly aerated soils
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  • Reaction indicator value: 5 – indicator of moderate acidity, occurring rarely in strongly acidic as well as in neutral to alkaline conditions
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  • Nutrient indicator value: 6 – transition between values 5 and 7
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  • Salinity indicator value: 1 – salt tolerant, mostly on low-salt to salt-free soils, but occasionally on slightly salty soils
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Habitat and sociology

  • Occurrence in habitats

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  • 4 Wetland and riverine herbaceous vegetation

  • 4H Vegetation of low annual hygrophilous herbs: 1 – rare occurrence
  • 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
  • Colonization ability

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  • Index of colonization success (ICS): 1

Distribution and frequency

  • Floristic zone: northern temperate, southern temperate, submeridional, meridional
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  • Floristic region: Europe, Western Asia
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  • Continentality degree: 6
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  • Distribution range extension along the continentality gradient: 5
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  • Elevational belt in the Czech Republic: lowlands, colline belt
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  • Occurrence frequency in the basic grid mapping cells and quadrants of the basic grid mapping cells: 30, 42
    ?
  • Commonness in vegetation plots from the Czech Republic

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  • Occurrence frequency in vegetation plots: 0 %
  • Occurrence frequency in vegetation plots with a cover above 5%: 100 %
  • Occurrence frequency in vegetation plots with a cover above 25%: 100 %
  • Occurrence frequency in vegetation plots with a cover above 50%: 0 %
  • Mean percentage cover in vegetation plots: 38 %
  • Maximum percentage cover in vegetation plots: 38 %
  • Number of habitats with taxon occurrence in the Czech Republic

    ?
  • Number of narrow habitats in which the taxon occurs: 1
  • Number of narrow habitats in which the taxon has its optimum: 0
  • Number of broad habitats in which the taxon occurs: 1
  • Number of broad habitats in which the taxon has its optimum: 0

Threats and protection

  • Red List 2017 (national categories): C1t – critically threatened taxon, declining
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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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