Erigeron acris agg.

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Habitus and growth type

  • Height [m]: 0.1–1.2
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  • Growth form: monocarpic perennial non-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, rosulate
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  • Leaf shape: simple – entire
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  • Stipules: absent
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  • Petiole: both present and absent, absent
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Flower

  • Flowering period [month]: June–October
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  • Flower colour: yellow, pink-violet
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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: racemus ex anthodiis compositus, panicula ex anthodiis composita
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  • Generative reproduction type: facultative allogamy
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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 myrmecochorous, probably myrmecochorous nv
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Belowground organs and clonality

  • Shoot life span (cyclicity): monocyclic shoots prevailing
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  • Primary root: present
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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): 8
  • 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): 13
  • Depth of the belowground bud bank (root buds exluded) [cm]: 3
  • 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): 8
  • 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): 13
  • Depth of the belowground bud bank (root buds included) [cm]: 3

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): 18
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  • Ploidy level (x): 2
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  • 2C genome size [Mbp]: 2529.48
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  • 1Cx monoploid genome size [Mbp]: 1264.74
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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: 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: 3 – occurring at nutrient-poor sites more frequently than at average sites and exceptionally at rich sites
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  • Salinity indicator value: 1 – salt tolerant, mostly on low-salt to salt-free soils, but occasionally on slightly salty soils
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  • Indicator values for disturbance

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  • Whole-community disturbance frequency indicator value: -0.15
  • Herb layer disturbance frequency indicator value: -0.14
  • Whole-community disturbance severity indicator value: 0.37
  • Herb layer disturbance severity indicator value: 0.4
  • Whole-community structure based disturbance indicator value: 0.65
  • Herb layer structure-based disturbance indicator value: 0.77

Habitat and sociology

  • Occurrence in habitats

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  • 1 Vegetation of cliffs, screes and walls

  • 1A Calcareous cliffs: 1 – rare occurrence
  • 1B Siliceous cliffs and block fields: 2 – optimum
  • 1D Mobile calcareous screes: 1 – rare occurrence
  • 6 Meadows and mesic pastures

  • 6A Mesic Arrhenatherum meadows: 1 – rare occurrence
  • 6C Pastures and park 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 Narrow-leaved sub-continental steppes: 2 – optimum
  • 8D Broad-leaved dry grasslands: 2 – optimum
  • 8E Acidophilous dry grasslands: 1 – rare occurrence
  • 8F Thermophilous forest fringe vegetation: 2 – optimum
  • 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
  • 10 Saline vegetation

  • 10J Saline steppes: 1 – rare occurrence
  • 13 Anthropogenic vegetation

  • 13A Annual vegetation of ruderal habitats: 1 – rare occurrence
  • 13C Annual vegetation of trampled habitats: 1 – rare occurrence
  • 13D Perennial thermophilous ruderal vegetation: 2 – optimum
  • 13F Herbaceous vegetation of forests clearings and Rubus scrub: 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
  • Diagnostic taxon

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  • Diagnostic taxon of associations: XCB04 Dauco carotae-Picridetum hieracioidis
  • Constant taxon

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  • Constant taxon of associations: KAB03 Salici purpureae-Myricarietum germanicae
  • Ecological specialization indices

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  • Ecological specialization index for all vegetation types: 4.8
  • Ecological specialization index for non-forest vegetation: 4.8

Distribution and frequency

  • Elevational belt in the Czech Republic: lowlands, colline belt, submontane belt, montane belt
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  • Occurrence frequency in the basic grid mapping cells and quadrants of the basic grid mapping cells: 542, 1226
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  • 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%: 1.4 %
  • 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: 1.7 %
  • Maximum percentage cover in vegetation plots: 13 %
  • Number of habitats with taxon occurrence in the Czech Republic

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  • Number of narrow habitats in which the taxon occurs: 21
  • Number of narrow habitats in which the taxon has its optimum: 7
  • Number of broad habitats in which the taxon occurs: 6
  • Number of broad habitats in which the taxon has its optimum: 4
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