Senecio umbrosus

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Habitus and growth type

  • Height [m]: 0.5–1.5
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  • Growth form: clonal herb
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  • Life form: hemicryptophyte
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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: both present and absent
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Flower

  • Flowering period [month]: July–September
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  • Flower colour: yellow
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  • Flower symmetry: actinomorphic, 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, tubular
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  • Calyx fusion: pappus
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  • Inflorescence type: corymbothyrsus ex anthodiis compositus
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Fruit, seed and dispersal

  • Fruit type: dry fruit – achene/cypsela/samara
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  • Fruit colour: brown
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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: probably non-myrmecochorous 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): 40
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  • Ploidy level (x): 4
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  • 2C genome size [Mbp]: 11896.83
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  • 1Cx monoploid genome size [Mbp]: 2974.21
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  • Genomic GC content: 39.4 %
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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: 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
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  • Temperature indicator value: 6 – transition between values 5 and 7
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  • Moisture indicator value: 6 – transition between values 5 and 7
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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: 5 – occurring at moderately nutrient-rich sites, and less frequently at poor and rich sites
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  • Salinity indicator value: 0 – not salt tolerant, glycophyte
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Habitat and sociology

  • Occurrence in habitats

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  • 5 Vegetation of springs and mires

  • 5D Calcareous fens: 2 – optimum
  • 8 Dry grasslands

  • 8D Broad-leaved dry grasslands: 2 – optimum
  • 8F Thermophilous forest fringe vegetation: 2 – optimum
  • 11 Heathlands and scrub

  • 11L Tall mesic and xeric shrub: 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
  • Colonization ability

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  • Index of colonization success (ICS): 1

Distribution and frequency

  • Elevational belt in the Czech Republic: colline belt
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  • Occurrence frequency in the basic grid mapping cells and quadrants of the basic grid mapping cells: 10, 23
    ?
  • Commonness in vegetation plots from the Czech Republic

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  • Occurrence frequency in vegetation plots: 0 %
  • Occurrence frequency in vegetation plots with a cover above 5%: 0 %
  • Occurrence frequency in vegetation plots with a cover above 25%: 0 %
  • Occurrence frequency in vegetation plots with a cover above 50%: 0 %
  • Mean percentage cover in vegetation plots: 1.5 %
  • Maximum percentage cover in vegetation plots: 2 %
  • Number of habitats with taxon occurrence in the Czech Republic

    ?
  • Number of narrow habitats in which the taxon occurs: 4
  • 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: 2

Threats and protection

  • Red List 2017 (national categories): C2r – endangered taxon, rare
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  • Red List 2017 (IUCN categories): EN – endangered
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  • Legal protection: not protected by law
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