Sorbus danubialis

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Habitus and growth type

  • Height [m]: 1–10
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  • Growth form: tree (shrub)
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  • Life form: macrophanerophyte (nanophanerophyte)
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  • Life strategy: C – competitor
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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: present
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  • Petiole: present
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  • Leaf life span: summer green
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  • Leaf deciduousness in woody plants: winter deciduous
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  • Leaf anatomy: scleromorphic, mesomorphic
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  • Functional leaf type in woody plants: broad deciduous or semi-deciduous
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Flower

  • Flowering period [month]: May
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  • Flower colour: white, yellow-white
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  • Flower symmetry: actinomorphic
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  • Perianth type: calyx and corolla
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  • Perianth fusion: free
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  • Calyx fusion: hypanthium
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  • Inflorescence type: corymbothyrsus
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  • Dicliny: synoecious
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  • Generative reproduction type: facultative apomixis
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  • Pollination syndrome: insect-pollination
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Fruit, seed and dispersal

  • Fruit type: fleshy fruit – pome
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  • Reproduction type: only by seed/spores
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  • Dispersal unit (diaspore): seed, fruit, infrutescence or its part
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  • Dispersal strategy: Cornus (mainly autochory and endozoochory)
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  • Myrmecochory: non-myrmecochorous (b)
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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): 68
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  • Ploidy level (x): 4
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  • 2C genome size [Mbp]: 2465.89
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  • 1Cx monoploid genome size [Mbp]: 616.47
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  • Genomic GC content: 40.3 %
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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: 6 – transition between values 5 and 7; rarely at less than 20% 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: 3 – missing on damp soil
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  • Reaction indicator value: 8 – transition between values 7 and 9, occurring mostly in calcium-rich 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: 0 – not salt tolerant, glycophyte
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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: 1 – rare occurrence
  • 1D Mobile calcareous screes: 1 – rare occurrence
  • 8 Dry grasslands

  • 8A Hercynian dry grasslands on rock outcrops: 2 – optimum
  • 8B Submediterranean dry grasslands on rock outcrops: 2 – optimum
  • 8C Narrow-leaved sub-continental steppes: 1 – rare occurrence
  • 8F Thermophilous forest fringe vegetation: 1 – rare occurrence
  • 11 Heathlands and scrub

  • 11L Tall mesic and xeric shrub: 1 – rare occurrence
  • 11N Low xeric scrub: 2 – optimum
  • 12 Forests

  • 12D Ravine forests: 1 – rare occurrence
  • 12H Peri-Alpidic basiphilous thermophilous oak forests: 1 – rare occurrence
  • 12J Acidophilous thermophilous oak forests: 2 – optimum
  • Affinity to the forest environment

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  • Affinity to the forest environment in Thermophyticum: 2.1 – taxon occurring both in the forest and open vegetation
  • Affinity to the forest environment in Mesophyticum and Oreophyticum: 2.1 – taxon occurring both in the forest and open vegetation

Distribution and frequency

  • Floristic zone: southern temperate, submeridional
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  • Floristic region: Europe
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  • Continentality degree: 6
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  • Distribution range extension along the continentality gradient: 2
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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: 72, 134
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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: 12
  • Number of narrow habitats in which the taxon has its optimum: 4
  • Number of broad habitats in which the taxon occurs: 4
  • Number of broad habitats in which the taxon has its optimum: 3

Threats and protection

  • Red List 2017 (national categories): C3 – vulnerable 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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