Elodea nuttallii

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Habitus and growth type

  • Height [m]: 0.3–1.5
    ?
  • Growth form: clonal herb
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  • Life form: hydrophyte
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Leaf

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

  • Flowering period [month]: June–September
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  • Flower colour: white
    ?
  • Perianth type: reduced or absent
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  • Perianth fusion: reduced
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  • Calyx fusion: aposepalous
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  • Inflorescence type: flores solitarii
    ?
  • Dicliny: dioecious
    ?
  • Generative reproduction type: allogamy
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  • Pollination syndrome: water-pollination
    ?

Fruit, seed and dispersal

  • Fruit type: dry fruit – capsule
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  • Reproduction type: only vegetatively
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  • Dispersal unit (diaspore): turion, shoot fragment
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  • Dispersal strategy: Wolffia (mainly hydrochory)
    ?
  • Myrmecochory: non-myrmecochorous (b)
    ?

Belowground organs and clonality

  • Shoot metamorphosis: turion
    ?
  • Storage organ: turion
    ?
  • Type of clonal growth organ: turion
    ?
  • Freely dispersible organs of clonal growth: present
    ?
  • Shoot life span (cyclicity): monocyclic shoots prevailing
    ?
  • Branching type of stem-derived organs of clonal growth: sympodial
    ?
  • Primary root: absent
    ?
  • Persistence of the clonal growth organ [year]: 1
    ?
  • Number of clonal offspring: 6
    ?
  • Lateral spreading distance by clonal growth [m]: 0
    ?
  • Clonal index: 7
    ?
  • Bud bank

    ?
  • Number of buds per shoot at the soil surface (root buds excluded): 3
  • 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): 3
  • Depth of the belowground bud bank (root buds exluded) [cm]: 1
  • Number of buds per shoot at the soil surface (root buds included): 3
  • 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): 3
  • Depth of the belowground bud bank (root buds included) [cm]: 1

Trophic mode

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

  • Origin in the Czech Republic: neophyte
    ?
  • Invasion status: casual
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  • Geographic origin: North America
    ?
  • Year of the first record in the wild: 1988
    ?
  • Introduction pathway: deliberate introduction
    ?

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
    ?
  • Temperature indicator value: 6 – transition between values 5 and 7
    ?
  • Moisture indicator value: 12 – permanently or almost permanently submerged aquatic plant
    ?
  • Reaction indicator value: 7x – indicator of slightly acidic to slightly basic conditions, never occurring in very acidic conditions (generalist)
    ?
  • Nutrient indicator value: 7 – occurring at nutrient-rich sites more often than at average sites and only exceptionally at poor sites
    ?
  • Salinity indicator value: 0 – not salt tolerant, glycophyte
    ?

Habitat and sociology

  • Affinity to the forest environment

    ?
  • 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

Distribution and frequency

  • Floristic zone: northern temperate, southern temperate, submeridional
    ?
  • Floristic region: Europe, Asia, Americas
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  • Continentality degree: 6
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  • Distribution range extension along the continentality gradient: 5
    ?
  • Occurrence frequency in the basic grid mapping cells and quadrants of the basic grid mapping cells: 22, 30
    ?

Threats and protection

  • Red List 2017 (national categories): taxon is not on the Red List
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  • Red List 2017 (IUCN categories): LC(NA) – least concern (taxon is not on the Red List)
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  • Legal protection: not protected by law
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