Erechtites hieraciifolius

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Habitus and growth type

  • Height [m]: 0.3–2.5
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  • Growth form: annual herb
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  • Life form: therophyte
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  • Life strategy: CR – competitor/ruderal
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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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  • Leaf life span: summer green
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Flower

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

  • Fruit type: dry fruit – achene/cypsela/samara
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  • Reproduction type: only by seed/spores
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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
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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]: 10909.01
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  • 1Cx monoploid genome size [Mbp]: 2727.25
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  • Genomic GC content: 38.5 %
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Taxon origin

  • Origin in the Czech Republic: neophyte
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  • Invasion status: invasive
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  • Geographic origin: North America
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  • Year of the first record in the wild: 1895
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  • Period of introduction: Late Modern Period (1800–1950)
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  • Introduction pathway: unintentional – nature
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Habitat and sociology

  • Occurrence in habitats

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  • 11 Heathlands and scrub

  • 11R Scrub and pioneer woodland of forests clearings: 1 – rare occurrence
  • 12 Forests

  • 12C Oak-hornbeam forests: 1 – rare occurrence
  • 12D Ravine forests: 1 – rare occurrence
  • 12E Herb-rich beech forests: 1 – rare occurrence
  • 12K Acidophilous oak forests: 1 – rare occurrence
  • 12V Spruce plantations: 1 – rare occurrence
  • 12W Pine and larch plantations: 1 – rare occurrence
  • 13 Anthropogenic vegetation

  • 13D Perennial thermophilous ruderal vegetation: 1 – rare occurrence
  • 13E Perennial nitrophilous herbaceous vegetation of mesic sites: 1 – rare occurrence
  • 13F Herbaceous vegetation of forests clearings and Rubus scrub: 2 – optimum
  • Affinity to the forest environment

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  • Affinity to the forest environment in Thermophyticum: 1.2 – taxon occurring mainly along forest edges and in forest openings, including forest roads and paths, windthrow sites, burnt sites and forest clearings
  • Affinity to the forest environment in Mesophyticum and Oreophyticum: 1.2 – taxon occurring mainly along forest edges and in forest openings, including forest roads and paths, windthrow sites, burnt sites and forest clearings
  • Colonization ability

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  • Index of colonization success (ICS): 1

Distribution and frequency

  • Floristic zone: northern temperate, southern temperate, tropical
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  • Floristic region: Eastern America
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  • 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: 337, 610
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  • Number of habitats with taxon occurrence in the Czech Republic

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  • Number of narrow habitats in which the taxon occurs: 10
  • 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): taxon is not on the Red List
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  • Red List 2017 (IUCN categories): LC(NA) – least concern (taxon is not on the Red List)
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  • Legal protection: not protected by law
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