Iris sibirica

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Habitus and growth type

  • Height [m]: 0.5–1.2
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  • Growth form: clonal herb
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  • Life form: hemicryptophyte (geophyte)
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  • Life strategy: CS – competitor/stress-tolerator
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  • Life strategy (Pierce method based on leaf traits): CSR
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  • Life strategy (Pierce method, C-score): 36.5 %
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  • Life strategy (Pierce method, S-score): 38.2 %
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  • Life strategy (Pierce method, R-score): 25.4 %
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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: summer green
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  • Leaf anatomy: mesomorphic, helomorphic
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Flower

  • Flowering period [month]: May–June
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  • Flowering phase: 6 Cornus sanguinea-Melica uniflora (start of early summer)
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  • Flower colour: white, blue-violet
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  • Flower symmetry: actinomorphic
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  • Perianth type: homochlamydeous
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  • Perianth fusion: fused
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  • Shape of the sympetalous corolla or syntepalous perianth: special type
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  • Inflorescence type: rhipidium
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  • Dicliny: synoecious
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  • Generative reproduction type: allogamy self-incompatibility
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  • Pollination syndrome: insect-pollination
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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: Allium (mainly autochory)
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  • Myrmecochory: non-myrmecochorous (a)
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Belowground organs and clonality

  • Shoot metamorphosis: rhizome
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  • Storage organ: rhizome
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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: 0.8
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  • Lateral spreading distance by clonal growth [m]: 0.04
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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): 3
  • 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): 18
  • Depth of the belowground bud bank (root buds exluded) [cm]: 4
  • 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): 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): 18
  • 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): 28
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  • Ploidy level (x): 2
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  • 2C genome size [Mbp]: 9421.05
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  • 1Cx monoploid genome size [Mbp]: 4710.52
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  • Genomic GC content: 43.9 %
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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: 6 – transition between values 5 and 7
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  • Moisture indicator value: 8 – transition between values 7 and 9
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  • Reaction indicator value: 6 – transition between values 5 and 7
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  • Nutrient indicator value: 3 – occurring at nutrient-poor sites more frequently than at average sites and exceptionally at rich sites
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  • Salinity indicator value: 0 – not salt tolerant, glycophyte
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  • Indicator values for disturbance

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  • Whole-community disturbance frequency indicator value: -0.74
  • Herb layer disturbance frequency indicator value: -0.22
  • Whole-community disturbance severity indicator value: 0.29
  • Herb layer disturbance severity indicator value: 0.31
  • Whole-community structure based disturbance indicator value: 0.48
  • Herb layer structure-based disturbance indicator value: 0.59

Habitat and sociology

  • Occurrence in habitats

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  • 5 Vegetation of springs and mires

  • 5D Calcareous fens: 1 – rare occurrence
  • 5E Acidic moss-rich fens and peatland meadows: 1 – rare occurrence
  • 6 Meadows and mesic pastures

  • 6D Alluvial meadows of lowland rivers: 1 – rare occurrence
  • 6E Wet Cirsium meadows: 2 – optimum
  • 6F Intermittently wet Molinia meadows: 2 – optimum
  • 6G Vegetation of wet disturbed soils: 2 – optimum
  • 12 Forests

  • 12I Sub-continental thermophilous oak forests: 1 – rare occurrence
  • 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
  • Diagnostic taxon

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  • Diagnostic taxon of associations: TDE03 Lathyro palustris-Gratioletum officinalis
  • Ecological specialization indices

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  • Ecological specialization index for all vegetation types: 5.4
  • Ecological specialization index for non-forest vegetation: 5.5
  • Colonization ability

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  • Index of colonization success (ICS): 1
  • Index of colonization potential (ICP): 1

Distribution and frequency

  • Floristic zone: northern temperate, southern temperate, submeridional
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  • Floristic region: Europe, Western Siberia
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  • Continentality degree: 6
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  • Distribution range extension along the continentality gradient: 3
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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: 286, 556
    ?
  • Commonness in vegetation plots from the Czech Republic

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  • Occurrence frequency in vegetation plots: 0.2 %
  • Occurrence frequency in vegetation plots with a cover above 5%: 22.4 %
  • Occurrence frequency in vegetation plots with a cover above 25%: 10.2 %
  • Occurrence frequency in vegetation plots with a cover above 50%: 2 %
  • Mean percentage cover in vegetation plots: 7.7 %
  • 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: 7
  • Number of narrow habitats in which the taxon has its optimum: 3
  • Number of broad habitats in which the taxon occurs: 3
  • Number of broad habitats in which the taxon has its optimum: 1

Threats and protection

  • Red List 2017 (national categories): C3 – vulnerable taxon
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  • Red List 2017 (IUCN categories): VU – vulnerable
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  • Legal protection: endangered taxon
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