Bromus inermis

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Habitus and growth type

  • Height [m]: 0.3–1.3
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  • Growth form: clonal herb
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  • Life form: hemicryptophyte
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  • Life strategy: C – competitor
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  • Life strategy (Pierce method based on leaf traits): CSR
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  • Life strategy (Pierce method, C-score): 38.7 %
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  • Life strategy (Pierce method, S-score): 32.3 %
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  • Life strategy (Pierce method, R-score): 29 %
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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: absent
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  • Leaf life span: summer green
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  • Leaf anatomy: scleromorphic, mesomorphic
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Flower

  • Flowering period [month]: June–July
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  • Flowering phase: 8 Clematis vitalba-Galium sylvaticum (mid-summer)
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  • Flower colour: green
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  • Perianth type: reduced
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  • Perianth fusion: reduced
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  • Inflorescence type: panicula e spiculis composita
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  • Dicliny: synoecious
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  • Generative reproduction type: facultative allogamy
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  • Pollination syndrome: wind-pollination
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Fruit, seed and dispersal

  • Fruit type: dry fruit – caryopsis
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  • Fruit colour: brown
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  • Reproduction type: by seed/spores and vegetatively
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  • Dispersal unit (diaspore): fruit, infrutescence or its part
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  • Dispersal strategy: Allium (mainly autochory)
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  • Myrmecochory: non-myrmecochorous (b)
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Belowground organs and clonality

  • Shoot metamorphosis: stolon
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  • Storage organ: stolon
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  • Type of clonal growth organ: hypogeogenous rhizome
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  • Freely dispersible organs of clonal growth: absent
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  • Shoot life span (cyclicity): dicyclic or polycyclic shoots prevailing
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  • Branching type of stem-derived organs of clonal growth: sympodial
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  • Primary root: absent
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  • Persistence of the clonal growth organ [year]: 3.6
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  • Number of clonal offspring: 3
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  • Lateral spreading distance by clonal growth [m]: 0.08
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  • Clonal index: 4
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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): 12
  • 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): 17
  • Depth of the belowground bud bank (root buds exluded) [cm]: 4
  • 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): 12
  • 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): 17
  • Depth of the belowground bud bank (root buds included) [cm]: 4

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): 56
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  • Ploidy level (x): 8
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  • 2C genome size [Mbp]: 19906.15
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  • 1Cx monoploid genome size [Mbp]: 2488.27
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  • Genomic GC content: 47.5 %
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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: 6 – transition between values 5 and 7
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  • Moisture indicator value: 4 – transition between values 3 and 5
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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: 6 – transition between values 5 and 7
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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: -0.82
  • Herb layer disturbance frequency indicator value: -0.59
  • Whole-community disturbance severity indicator value: 0.47
  • Herb layer disturbance severity indicator value: 0.47
  • Whole-community structure based disturbance indicator value: 0.46
  • Herb layer structure-based disturbance indicator value: 0.55

Habitat and sociology

  • Occurrence in habitats

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  • 4 Wetland and riverine herbaceous vegetation

  • 4D Riverine reed vegetation: 2 – optimum
  • 4I Vegetation of nitrophilous annual hygrophilous herbs: 1 – rare occurrence
  • 4J River gravel banks: 1 – rare occurrence
  • 4L Nitrophilous herbaceous fringes of lowland rivers: 2 – optimum
  • 6 Meadows and mesic pastures

  • 6A Mesic Arrhenatherum meadows: 1 – rare occurrence
  • 6C Pastures and park grasslands: 1 – rare occurrence
  • 6D Alluvial meadows of lowland rivers: 2 – optimum
  • 6E Wet Cirsium meadows: 1 – rare occurrence
  • 8 Dry grasslands

  • 8C Narrow-leaved sub-continental steppes: 2 – optimum
  • 8D Broad-leaved dry grasslands: 2 – optimum
  • 8F Thermophilous forest fringe vegetation: 2 – optimum
  • 9 Sand grasslands and rock-outcrop vegetation

  • 9C Festuca grasslands on acidic sands: 1 – rare occurrence
  • 11 Heathlands and scrub

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

  • 12H Peri-Alpidic basiphilous thermophilous oak forests: 1 – rare occurrence
  • 12I Sub-continental thermophilous oak forests: 1 – rare occurrence
  • 12J Acidophilous thermophilous oak forests: 1 – rare occurrence
  • 12T Robinia pseudacacia plantations: 1 – rare occurrence
  • 13 Anthropogenic vegetation

  • 13A Annual vegetation of ruderal habitats: 1 – rare occurrence
  • 13D Perennial thermophilous ruderal vegetation: 3 – dominant
  • 13E Perennial nitrophilous herbaceous vegetation of mesic sites: 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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  • Constant taxon

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  • Dominant taxon

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  • Ecological specialization indices

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  • Ecological specialization index for all vegetation types: 3.6
  • Ecological specialization index for non-forest vegetation: 3.7
  • Ecological specialization index for forest vegetation: 4.1
  • Colonization ability

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  • Index of colonization success (ICS): 3
  • Index of colonization potential (ICP): 2
  • Optimum successional age [years]: 15

Distribution and frequency

  • Floristic zone: boreal, northern temperate, southern temperate, submeridional
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  • Floristic region: circumpolar
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  • Continentality degree: 7
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  • Distribution range extension along the continentality gradient: 7
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  • Elevational belt in the Czech Republic: lowlands, colline belt (subalpine belt)
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  • Occurrence frequency in the basic grid mapping cells and quadrants of the basic grid mapping cells: 466, 1056
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  • Commonness in vegetation plots from the Czech Republic

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  • Occurrence frequency in vegetation plots: 0.6 %
  • Occurrence frequency in vegetation plots with a cover above 5%: 37.1 %
  • Occurrence frequency in vegetation plots with a cover above 25%: 21.3 %
  • Occurrence frequency in vegetation plots with a cover above 50%: 15.2 %
  • Mean percentage cover in vegetation plots: 17.2 %
  • Maximum percentage cover in vegetation plots: 88 %
  • 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: 8
  • Number of broad habitats in which the taxon occurs: 7
  • Number of broad habitats in which the taxon has its optimum: 5

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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