Cerastium pumilum

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Habitus and growth type

  • Height [m]: 0.05–0.2
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  • Growth form: annual herb
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  • Life form: therophyte
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  • Life strategy: SR – stress-tolerator/ruderal
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Leaf

  • Leaf presence and metamorphosis: leaves present, not modified
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  • Leaf arrangement (phyllotaxis): opposite, rosulate
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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: overwintering green
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  • Leaf anatomy: scleromorphic, mesomorphic
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Flower

  • Flowering period [month]: April–May
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  • Flowering phase: 3 Prunus avium-Ranunculus auricomus (end of early spring)
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  • Flower colour: 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: aposepalous
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  • Inflorescence type: dichasium
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  • Dicliny: synoecious, gynomonoecious, gynodioecious
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  • Generative reproduction type: facultative autogamy
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  • Pollination syndrome: insect-pollination, selfing
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Fruit, seed and dispersal

  • Fruit type: dry fruit – capsule
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  • Fruit colour: brown
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  • Reproduction type: only by seed/spores
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  • Dispersal unit (diaspore): seed
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  • Dispersal strategy: Allium (mainly autochory)
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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): 108
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  • Ploidy level (x): 12
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  • 2C genome size [Mbp]: 2938.5
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  • 1Cx monoploid genome size [Mbp]: 244.87
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  • Genomic GC content: 38.5 %
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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: 9 – full light plant, occurring only in fully irradiated places, not at less than 50% of diffuse radiation incident in an open area
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  • Temperature indicator value: 8 – transition between values 7 and 9
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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

  • 1D Mobile calcareous screes: 1 – rare occurrence
  • 8 Dry grasslands

  • 8A Hercynian dry grasslands on rock outcrops: 1 – rare occurrence
  • 8B Submediterranean dry grasslands on rock outcrops: 2 – optimum
  • 8C Narrow-leaved sub-continental steppes: 2 – optimum
  • 8D Broad-leaved dry grasslands: 1 – rare occurrence
  • 8E Acidophilous dry grasslands: 1 – rare occurrence
  • 8F Thermophilous forest fringe vegetation: 1 – rare occurrence
  • 9 Sand grasslands and rock-outcrop vegetation

  • 9B Open vegetation of acidic sands: 1 – rare occurrence
  • 9C Festuca grasslands on acidic sands: 1 – rare occurrence
  • 9D Pannonian sand steppes: 2 – optimum
  • 9E Acidophilous vegetation of spring therophytes and succulents: 2 – optimum
  • 9F Basiphilous vegetation of spring therophytes and succulents: 3 – dominant
  • 13 Anthropogenic vegetation

  • 13A Annual vegetation of ruderal habitats: 1 – rare occurrence
  • 13D Perennial thermophilous ruderal vegetation: 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
  • Colonization ability

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  • Index of colonization success (ICS): 2
  • Index of colonization potential (ICP): 2
  • Optimum successional age [years]: 75

Distribution and frequency

  • Floristic zone: northern temperate, southern temperate, submeridional, meridional
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  • Floristic region: Europe
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  • Continentality degree: 4
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  • Distribution range extension along the continentality gradient: 4
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  • Elevational belt in the Czech Republic: lowlands, colline belt
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  • Occurrence frequency in the basic grid mapping cells and quadrants of the basic grid mapping cells: 61, 93
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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: 14
  • Number of narrow habitats in which the taxon has its optimum: 5
  • 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): 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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