Crepis foetida subsp. rhoeadifolia

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Habitus and growth type

  • Life form: therophyte (hemicryptophyte)
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Leaf

  • Leaf presence and metamorphosis: leaves present, not modified
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  • Leaf arrangement (phyllotaxis): alternate, rosulate
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  • Leaf shape: simple – pinnately divided
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  • Stipules: absent
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  • Petiole: both present and absent
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Flower

  • Flower colour: yellow
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  • Flower symmetry: zygomorphic
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  • Perianth type: calyx reduced, corolla present
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  • Perianth fusion: fused
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  • Shape of the sympetalous corolla or syntepalous perianth: ligulate
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  • Calyx fusion: pappus
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  • Inflorescence type: corymbothyrsus ex anthodiis compositus
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  • Generative reproduction type: allogamy self-incompatibility
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Fruit, seed and dispersal

  • Fruit type: dry fruit – achene/cypsela/samara
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  • Dispersal unit (diaspore): fruit, infrutescence or its part
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  • Dispersal strategy: Epilobium (mainly anemochory and autochory)
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  • Myrmecochory: non-myrmecochorous (b) nv
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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): 10
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  • Ploidy level (x): 2
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  • 2C genome size [Mbp]: 3440.91
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  • 1Cx monoploid genome size [Mbp]: 1720.45
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  • Genomic GC content: 41.5 %
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Taxon origin

  • Origin in the Czech Republic: archaeophyte
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  • Invasion status: naturalized
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  • Geographic origin: Europe, Mediterranean
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  • Period of introduction: Neolithic (5600–4200 BCE)
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  • Introduction pathway: unintentional – industry, unintentional – anthropogenic
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Ecological indicator values

  • Ellenberg-type indicator values

  • Light indicator value: 9 – full light plant, occurring only in fully irradiated places, not at less than 50% of diffuse radiation incident in an open area
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  • Temperature indicator value: 7 – heat indicator, occurring in relatively warm lowlands
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  • Moisture indicator value: 4 – transition between values 3 and 5
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  • Reaction indicator value: 7 – indicator of slightly acidic to slightly basic conditions, never occurring in very acidic conditions
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  • Nutrient indicator value: 4 – transition between values 3 and 5
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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: -0.25
  • Herb layer disturbance frequency indicator value: -0.25
  • Whole-community disturbance severity indicator value: 0.61
  • Herb layer disturbance severity indicator value: 0.63
  • Whole-community structure based disturbance indicator value: 0.71
  • Herb layer structure-based disturbance indicator value: 0.71

Habitat and sociology

  • Occurrence in habitats

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  • 1 Vegetation of cliffs, screes and walls

  • 1D Mobile calcareous screes: 1 – rare occurrence
  • 9 Sand grasslands and rock-outcrop vegetation

  • 9F Basiphilous vegetation of spring therophytes and succulents: 1 – rare occurrence
  • 13 Anthropogenic vegetation

  • 13A Annual vegetation of ruderal habitats: 1 – rare occurrence
  • 13D Perennial thermophilous ruderal vegetation: 2 – optimum
  • 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
  • Diagnostic taxon

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  • Constant taxon

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  • Constant taxon of associations: XCB03 Dauco carotae-Crepidetum rhoeadifoliae
  • Dominant taxon

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  • Dominant taxon of associations: XCB03 Dauco carotae-Crepidetum rhoeadifoliae
  • Ecological specialization indices

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  • Ecological specialization index for all vegetation types: 4.5
  • Ecological specialization index for non-forest vegetation: 4.5

Distribution and frequency

  • 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: 153, 265
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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%: 31.3 %
  • Occurrence frequency in vegetation plots with a cover above 25%: 21.9 %
  • Occurrence frequency in vegetation plots with a cover above 50%: 3.1 %
  • Mean percentage cover in vegetation plots: 11.9 %
  • Maximum percentage cover in vegetation plots: 63 %
  • Number of habitats with taxon occurrence in the Czech Republic

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  • Number of narrow habitats in which the taxon occurs: 4
  • Number of narrow habitats in which the taxon has its optimum: 1
  • 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): C4a – near threatened taxon
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  • Red List 2017 (IUCN categories): NT – near threatened
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  • Legal protection: not protected by law
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