Carex oederi

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Habitus and growth type

  • Height [m]: 0.05–0.25
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  • Growth form: clonal herb
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  • Life form: hemicryptophyte
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  • Life strategy: S – stress-tolerator
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  • Life strategy (Pierce method based on leaf traits): SR/CSR
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  • Life strategy (Pierce method, C-score): 16.4 %
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  • Life strategy (Pierce method, S-score): 44.4 %
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  • Life strategy (Pierce method, R-score): 39.3 %
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Leaf

  • Leaf presence and metamorphosis: leaves present, not modified
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  • Leaf arrangement (phyllotaxis): alternate
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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
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  • Leaf anatomy: mesomorphic, helomorphic
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Flower

  • Flowering period [month]: June
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  • Flower colour: green
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  • Perianth type: flower achlamydeous
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  • Inflorescence type: spica e spiculis composita
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  • Dicliny: monoecious
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  • Generative reproduction type: facultative autogamy
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  • Pollination syndrome: wind-pollination, selfing
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Fruit, seed and dispersal

  • Fruit type: dry fruit – nut enclosed in an utricle
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  • Fruit colour: green, yellow, brown
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  • Reproduction type: by seed/spores and vegetatively
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  • Dispersal unit (diaspore): fruit, infrutescence or its part
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  • Dispersal strategy: Allium (mainly autochory)
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  • Myrmecochory: probably myrmecochorous
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Belowground organs and clonality

  • Shoot metamorphosis: rhizome
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  • Storage organ: rhizome, tuft
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  • Type of clonal growth organ: epigeogenous rhizome
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  • Freely dispersible organs of clonal growth: absent
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  • Shoot life span (cyclicity): dicyclic or polycyclic shoots prevailing
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  • Branching type of stem-derived organs of clonal growth: sympodial
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  • Primary root: absent
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  • Persistence of the clonal growth organ [year]: 4
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  • Number of clonal offspring: 1
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  • Lateral spreading distance by clonal growth [m]: 0.01
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  • Clonal index: 3
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  • Bud bank

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  • Number of buds per shoot at the soil surface (root buds excluded): 5
  • Number of buds per shoot at a depth of 0–10 cm (root buds excluded): 15
  • 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): 20
  • Depth of the belowground bud bank (root buds exluded) [cm]: 4
  • Number of buds per shoot at the soil surface (root buds included): 5
  • Number of buds per shoot at a depth of 0–10 cm (root buds included): 15
  • 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): 20
  • Depth of the belowground bud bank (root buds included) [cm]: 4

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): 70
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  • Ploidy level (x): 2
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  • 2C genome size [Mbp]: 695
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  • 1Cx monoploid genome size [Mbp]: 347.5
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  • Genomic GC content: 35.9 %
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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: 8 – light plant, only exceptionally occurring at less than 40% of diffuse radiation incident in an open area
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  • Temperature indicator value: 5 – moderate heat indicator, occurring from lowland to montane belt, mainly in submontane-temperate areas
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  • Moisture indicator value: 9 – wetness indicator, focus on often soaked, poorly aerated soils
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  • Reaction indicator value: 7x – indicator of slightly acidic to slightly basic conditions, never occurring in very acidic conditions (generalist)
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  • Nutrient indicator value: 2 – transition between values 1 and 3
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  • Salinity indicator value: 3 – β-mesohaline, mostly on soils with low salt content
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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
  • 4 Wetland and riverine herbaceous vegetation

  • 4H Vegetation of low annual hygrophilous herbs: 1 – rare occurrence
  • 5 Vegetation of springs and mires

  • 5C Alpine and subalpine soft-water springs: 1 – rare occurrence
  • 5D Calcareous fens: 2 – optimum
  • 5E Acidic moss-rich fens and peatland meadows: 1 – rare occurrence
  • 5F Transitional mires: 1 – rare occurrence
  • 5H Wet peat soils and bog hollows: 1 – rare occurrence
  • 6 Meadows and mesic pastures

  • 6G Vegetation of wet disturbed soils: 2 – optimum
  • 10 Saline vegetation

  • 10I Inland saline meadows: 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
  • Ecological specialization indices

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  • Ecological specialization index for all vegetation types: 4.3
  • Ecological specialization index for non-forest vegetation: 4.3
  • Colonization ability

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  • Index of colonization success (ICS): 2
  • Index of colonization potential (ICP): 7
  • Optimum successional age [years]: 20

Distribution and frequency

  • Floristic zone: boreal, northern temperate, southern temperate, submeridional, meridional, austral or antarctic
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  • Floristic region: circumpolar
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  • Distribution range extension along the continentality gradient: 6
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  • Elevational belt in the Czech Republic: lowlands, colline belt, submontane belt
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  • Occurrence frequency in the basic grid mapping cells and quadrants of the basic grid mapping cells: 154, 242
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  • Commonness in vegetation plots from the Czech Republic

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  • Occurrence frequency in vegetation plots: 0.1 %
  • Occurrence frequency in vegetation plots with a cover above 5%: 27.8 %
  • Occurrence frequency in vegetation plots with a cover above 25%: 11.1 %
  • Occurrence frequency in vegetation plots with a cover above 50%: 0 %
  • Mean percentage cover in vegetation plots: 8.2 %
  • Maximum percentage cover in vegetation plots: 42 %
  • Number of habitats with taxon occurrence in the Czech Republic

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  • Number of narrow habitats in which the taxon occurs: 9
  • Number of narrow habitats in which the taxon has its optimum: 3
  • Number of broad habitats in which the taxon occurs: 5
  • Number of broad habitats in which the taxon has its optimum: 3

Threats and protection

  • Red List 2017 (national categories): C2b – endangered taxon, rare and declining
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  • Red List 2017 (IUCN categories): VU – vulnerable
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  • Legal protection: not protected by law
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