Poa humilis

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Habitus and growth type

  • Height [m]: 0.1–0.8
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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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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: evergreen
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  • Leaf anatomy: mesomorphic
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Flower

  • Flowering period [month]: June-July
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  • Flowering phase: 6 Cornus sanguinea-Melica uniflora (start of early 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: mixed mating
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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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  • 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 (a)
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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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  • Primary root: absent
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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): 15
  • 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): 20
  • 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): 15
  • 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): 20
  • 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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Taxon origin

  • Origin in the Czech Republic: native
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Ecological indicator values

  • Ellenberg-type indicator values

  • Light indicator value: 7 – half-light plant, mostly occurring at full light, but also in the shade up to about 30% 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: 5 – indicator of fresh soils, focus on soils of average moisture, missing on wet and on soils that frequently dry out
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  • Reaction indicator value: 5 – indicator of moderate acidity, occurring rarely in strongly acidic as well as in neutral to alkaline conditions
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  • Nutrient indicator value: 4 – transition between values 3 and 5
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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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  • 4 Wetland and riverine herbaceous vegetation

  • 4D Riverine reed vegetation: 1 – rare occurrence
  • 4E Reed vegetation of brooks: 1 – rare occurrence
  • 5 Vegetation of springs and mires

  • 5B Lowland to montane soft-water springs: 1 – rare occurrence
  • 5C Alpine and subalpine soft-water springs: 1 – rare occurrence
  • 6 Meadows and mesic pastures

  • 6B Montane mesic meadows: 1 – rare occurrence
  • 6C Pastures and park grasslands: 2 – optimum
  • 7 Acidophilous grasslands

  • 7A Subalpine and montane acidophilous grasslands: 2 – optimum
  • 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
  • Colonization ability

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  • Index of colonization success (ICS): 1

Distribution and frequency

  • Floristic zone: boreal, northern temperate
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  • Floristic region: Europe
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  • Distribution range extension along the continentality gradient: 5
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  • Elevational belt in the Czech Republic: submontane belt, montane belt (lowlands)
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  • Occurrence frequency in the basic grid mapping cells and quadrants of the basic grid mapping cells: 159, 255
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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: 7
  • Number of narrow habitats in which the taxon has its optimum: 2
  • Number of broad habitats in which the taxon occurs: 4
  • Number of broad habitats in which the taxon has its optimum: 2

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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