Allium cepa

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Habitus and growth type

  • Height [m]: 0.6
    ?
  • Growth form: clonal herb
    ?
  • Life form: geophyte
    ?
  • Life strategy: CSR – competitor/stress-tolerator/ruderal
    ?

Leaf

  • Leaf presence and metamorphosis: leaves present, not modified
    ?
  • Leaf arrangement (phyllotaxis): alternate
    ?
  • Leaf shape: simple – entire
    ?
  • Stipules: absent
    ?
  • Petiole: absent
    ?
  • Leaf life span: summer green
    ?

Flower

  • Flowering period [month]: June–August
    ?
  • Flower colour: green-white
    ?
  • Flower symmetry: actinomorphic
    ?
  • Perianth type: homochlamydeous
    ?
  • Perianth fusion: free
    ?
  • Inflorescence type: pseudumbella
    ?
  • Dicliny: synoecious
    ?
  • Generative reproduction type: facultative allogamy
    ?
  • Pollination syndrome: insect-pollination, selfing
    ?

Fruit, seed and dispersal

  • Fruit type: dry fruit – capsule
    ?
  • Fruit colour: brown
    ?
  • Reproduction type: only by seed/spores
    ?
  • Dispersal unit (diaspore): seed
    ?
  • Dispersal strategy: Allium (mainly autochory)
    ?
  • Myrmecochory: non-myrmecochorous (a)
    ?

Belowground organs and clonality

  • Shoot metamorphosis: bulb
    ?
  • Storage organ: bulb
    ?
  • Type of clonal growth organ: bulb
    ?
  • Freely dispersible organs of clonal growth: present
    ?
  • Shoot life span (cyclicity): monocyclic shoots prevailing
    ?
  • Branching type of stem-derived organs of clonal growth: sympodial
    ?
  • Primary root: absent
    ?
  • Persistence of the clonal growth organ [year]:
    ?
  • Number of clonal offspring: 2.3
    ?
  • Lateral spreading distance by clonal growth [m]: 0.01
    ?
  • Clonal index: 3
    ?
  • Bud bank

    ?
  • Number of buds per shoot at the soil surface (root buds excluded):
  • Number of buds per shoot at a depth of 0–10 cm (root buds excluded):
  • Number of buds per shoot at a depth greater than 10 cm (root buds excluded):
  • Size of the belowground bud bank (root buds excluded):
  • Depth of the belowground bud bank (root buds exluded) [cm]:
  • Number of buds per shoot at the soil surface (root buds included):
  • Number of buds per shoot at a depth of 0–10 cm (root buds included):
  • Number of buds per shoot at a depth greater than 10 cm (root buds included):
  • Size of the belowground bud bank (root buds included):
  • Depth of the belowground bud bank (root buds included) [cm]:

Trophic mode

  • Parasitism and mycoheterotrophy: autotrophic
    ?
  • Carnivory: non-carnivorous
    ?
  • Symbiotic nitrogen fixation: no nitrogen-fixing symbionts
    ?

Taxon origin

  • Origin in the Czech Republic: archaeophyte
    ?
  • Invasion status: casual
    ?
  • Geographic origin: Mediterranean
    ?
  • Period of introduction: Late Middle Ages (1200–1500)
    ?
  • Introduction pathway: intentional – crops
    ?

Habitat and sociology

  • 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

Distribution and frequency

  • Floristic zone: meridional
    ?
  • Floristic region: Middle Asia
    ?
  • Occurrence frequency in the basic grid mapping cells and quadrants of the basic grid mapping cells: 33, 36
    ?
  • Commonness in vegetation plots from the Czech Republic

    ?
  • Occurrence frequency in vegetation plots: 0 %
  • Occurrence frequency in vegetation plots with a cover above 5%: 25 %
  • Occurrence frequency in vegetation plots with a cover above 25%: 12.5 %
  • Occurrence frequency in vegetation plots with a cover above 50%: 0 %
  • Mean percentage cover in vegetation plots: 8 %
  • Maximum percentage cover in vegetation plots: 38 %

Threats and protection

  • Red List 2017 (national categories): taxon is not on the Red List
    ?
  • Red List 2017 (IUCN categories): LC(NA) – least concern (taxon is not on the Red List)
    ?
  • Legal protection: not protected by law
    ?
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