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Carex praecox

Habitus and growth type

  • Height [m]: 0.05-0.4 ?
  • Growth form: clonal herb or dwarf shrub ?
  • Life form: hemikryptophyte (geophyte) ?
  • Life strategy: CSR - competitor/stress-tolerator/ruderal ?
  • Shoot metamorphosis: runner, rhizome ?

Leaf

  • Leaf presence and metamorphosis: leaves present ?
  • Leaf arrangement (phyllotaxis): alternate ?
  • Leaf type: simple ?
  • Simple leaf type: entire ?
  • Stipules: absent ?
  • Petiole: absent ?
  • Leaf persistence: summer green ?
  • Leaf anatomy: scleromorphic ?

Flower

  • Flowering period [month]: April-May ?
  • Flowering phase: 4 Fagus-Lamiastrum (start of mid-spring) ?
  • Flower colour: brown ?
  • Perianth: flower achlamydeous ?
  • Inflorescence type: spica e spiculis composita ?
  • Dicliny: monoecious ?
  • Generative reproduction mode: facultative allogamy ?
  • Pollen vector: wind ?

Fruit, seed and dispersal

  • Fruit type: dry fruit - nut enclosed in an utricle ?
  • Fruit colour: brown, yellow ?
  • Reproduction type: by seed/spores and vegetatively ?
  • Dispersal unit (diaspore): fruit, infrutescence or its part ?
  • Myrmecochory: 4 - non-myrmecochorous (a): elaiosome not present although reported as myrmecochorous in the literature or is a close relative of taxa considered myrmecochorous ?
  • Dispersal strategy: Allium ?

Belowground organs and clonality

  • Shoot life span (cyclicity): dicyclic or polycyclic shoots prevailing ?
  • Branching type of stem-derived organs of clonal growth: sympodial ?
  • Primary root presence: absent ?
  • Persistence of the clonal growth organ [year]: 4 ?
  • Number of clonal offspring: 2 ?
  • Lateral spreading distance by clonal growth [m]: 0.13 ?
  • Clonal index: 4 ?
  • Presence of freely dispersible organs of clonal growth: absent ?
  • Type of clonal growth organ: hypogeogenous rhizome ?
  •   Bud bank ?
  • 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 ?
  • Carnivory: no ?
  • Symbiotic nitrogen fixing: no nitrogen-fixing symbionts ?

Karyology

  • Chromosome number (2n): 58 ?
  • Ploidy level (x): 2 ?
  • 2C genome size (Mbp): 621.85 ?
  • 1Cx monoploid genome size (Mbp): 310.93 ?
  • Genomic GC content: 35.8 % ?

Taxon origin

  • Origin in the Czech Republic: native ?

Ecological indicator values

  • Hemeroby: oligohemerobic, mesohemerobic ?
  • Urbanity: urbanophobic ?
  •   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: 6 ?
  • Moisture indicator value: 4 - between 3 and 5 ?
  • Reaction indicator value: 6x - between 5 and 7 (generalist) ?
  • Nutrient indicator value: 4 - between 3 and 5 ?
  • Salinity indicator value: 1 - salt tolerant, mostly on low-salt to salt-free soils, but occasionally on slightly salty soils ?
  •   Indicator values for disturbance ?
  • Whole-community disturbance frequency indicator value: 0.69
  • Herb layer disturbance frequency indicator value: 0.39
  • Whole-community disturbance severity indicator value: 0.28
  • Herb layer disturbance severity indicator value: 0.3
  • Whole-community structure based disturbance indicator value: 0.53
  • Herb layer structure-based disturbance indicator value: 0.63

Habitat and sociology

  •   Occurrence in habitats ?
  •   5 Vegetation of springs and mires
  • 5D Calcareous fens: 1 - rare occurrence
  •   6 Meadows and mesic pastures
  • 6A Mesic Arrhenatherum meadows: 2 - optimum
  • 6C Pastures and park grasslands: 1 - rare occurrence
  • 6D Alluvial meadows of lowland rivers: 2 - optimum
  • 6F Intermittently wet Molinia meadows: 2 - optimum
  •   7 Acidophilous grasslands
  • 7B Submontane Nardus grasslands: 1 - rare occurrence
  •   8 Dry grasslands
  • 8A Hercynian dry grasslands on rock outcrops: 1 - rare occurrence
  • 8B Submediterranean dry grasslands on rock outcrops: 1 - rare occurrence
  • 8C Narow-leaved sub-continental steppes: 2 - optimum
  • 8D Broad-leaved dry grasslands: 1 - rare occurrence
  • 8E Acidophilous dry grasslands: 2 - optimum
  • 8F Thermophilous forest fringe vegetation: 1 - rare occurrence
  •   9 Sand grasslands and rock-outcrop vegetation
  • 9B Open vegetation of acidic sands: 1 - rare occurrence
  • 9C Festuca grasslands on acidic sands: 2 - optimum
  • 9D Pannonian sand steppes: 2 - optimum
  • 9E Acidophilous vegetation of spring therophytes and succulents: 1 - rare occurrence
  • 9F Basiphilous vegetation of spring therophytes and succulents: 1 - rare occurrence
  •   11 Heathlands and scrub
  • 11L Tall mesic and xeric shrub: 1 - rare occurrence
  • 11N Low xeric scrub: 1 - rare occurrence
  •   12 Forests
  • 12C Oak-hornbeam forests: 1 - rare occurrence
  • 12H Peri-Alpidic basiphilous thermophilous oak forests: 1 - rare occurrence
  • 12I Sub-continental thermophilous oak forests: 1 - rare occurrence
  • 12K Acidophilous oak forests: 1 - rare occurrence
  • 12W Pinus and Larix plantations: 1 - rare occurrence
  •   13 Anthropogenic vegetation
  • 13D Perennial thermophilous ruderal vegetation: 2 - optimum
  •   Affinity to the forest environment ?
  • Affinity to the forest environment in Thermophyticum: 2.2 - taxon occurring partly in the forest, but mainly in open vegetation
  • Affinity to the forest environment in Mesophyticum and Oreophyticum: 2.2 - taxon occurring partly in the forest, but mainly in open vegetation
  •   Diagnostic taxa ?
  •   Constant taxa ?
  •   Ecological specialization indices ?
  • Ecological specialization index for all vegetation types: 4.1
  • Ecological specialization index for non-forest vegetation: 4.2
  • Ecological specialization index for forest vegetation: 4.6

Distribution and frequency

  • Floristic zone: northern temperate, southern temperate, submeridional ?
  • Floristic region: Europe, Asia ?
  • Continentality degree: 6 ?
  • Distribution range extension along the continentality gradient: 6 ?
  • Altitudinal belt in the Czech Republic: lowlands, colline belt ?
  • Occurrence frequency in the basic grid mapping cells and in quadrants of the basic grid mapping cells: 303, 660 ?
  •   Commonness in vegetation plots from the Czech Republic ?
  • Occurrence frequency in vegetation plots: 0.5 %
  • Occurrence frequency in vegetation plots with a cover above 5%: 24 %
  • Occurrence frequency in vegetation plots with a cover above 25%: 2.6 %
  • Occurrence frequency in vegetation plots with a cover above 50%: 1.3 %
  • Mean percentage cover in vegetation plots: 5.7 %
  • Maximum percentage cover in vegetation plots: 63 %
  •   Number of habitats with taxon occurrence in the Czech Republic ?
  • Number of narrow habitats in which the taxon occurs: 25
  • Number of narrow habitats in which the taxon has its optimum: 8
  • Number of broad habitats in which the taxon occurs: 8
  • Number of broad habitats in which the taxon has its optimum: 4

Threats and protection

  • Legal protection: not protected by law ?

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