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Euphorbia exigua

Habitus and growth type

  • Height [m]: 0.05–0.2 ?
  • Growth form: annual herb ?
  • Life form: therophyte ?
  • Life strategy: R - ruderal ?
  • Life strategy (Pierce method based on leaf traits): R/SR ?
  • Life strategy (Pierce method, C-score): 0.5 % ?
  • Life strategy (Pierce method, S-score): 34.8 % ?
  • Life strategy (Pierce method, R-score): 64.8 % ?

Leaf

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

Flower

  • Flowering period [month]: June-September ?
  • Flowering phase: 6 Cornus sanguinea-Melica uniflora (start of early summer) ?
  • Flower colour: green ?
  • Perianth: flower achlamydeous ?
  • Inflorescence type: pseudumbella e cyathiis composita ?
  • Dicliny: synoecious ?
  • Generative reproduction mode: mixed mating ?
  • Pollen vector: insects ?

Fruit, seed and dispersal

  • Fruit type: dry fruit – capsule ?
  • Reproduction type: only by seed/spores ?
  • Dispersal unit (diaspore): seed ?
  • Dispersal strategies: Allium (mainly autochory) ?
  • Myrmecochory: probably myrmecochorous ?

Belowground organs and clonality

  • Shoot life span (cyclicity): monocyclic shoots prevailing ?
  • Primary root presence: present ?
  • Position of root buds: hypocotyl ?
  • Role of root buds in life-history of a plant: additive ?
  •   Bud bank ?
  • Number of buds per shoot at the soil surface (root buds excluded): 4
  • Number of buds per shoot at a depth of 0–10 cm (root buds excluded): 0
  • 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): 4
  • Depth of the belowground bud bank (root buds exluded) [cm]: 1
  • Number of buds per shoot at the soil surface (root buds included): 10
  • Number of buds per shoot at a depth of 0–10 cm (root buds included): 0
  • 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): 10
  • Depth of the belowground bud bank (root buds included) [cm]: 1

Trophic mode

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

Karyology

  • Chromosome number (2n): 24 (16, 26, 28, 56) ?
  • Ploidy level (x): 2 ?
  • 2C genome size [Mbp]: 1149.61 ?
  • 1Cx monoploid genome size [Mbp]: 574.81 ?
  • Genomic GC content: 38.7 % ?

Taxon origin

  • Origin in the Czech Republic: archaeophyte ?
  • Invasion status: naturalized ?
  • Geographic origin: Mediterranean ?
  • Introduction pathway: accidental introduction ?

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 ?
  • Temperature indicator value: 6 - transition between values 5 and 7 ?
  • Moisture indicator value: 4 - transition between values 3 and 5 ?
  • Reaction indicator value: 8 - transition between values 7 and 9, occurring mostly in calcium-rich conditions ?
  • Nutrient indicator value: 5 - occurring at moderately nutrient-rich sites, and less frequently at poor and rich sites ?
  • Salinity indicator value: 0 - not salt tolerant, glycophyte ?
  •   Indicator values for disturbance ?
  • Whole-community disturbance frequency indicator value: 0.42
  • Herb layer disturbance frequency indicator value: 0.42
  • Whole-community disturbance severity indicator value: 0.99
  • Herb layer disturbance severity indicator value: 0.99
  • Whole-community structure based disturbance indicator value: 0.76
  • Herb layer structure-based disturbance indicator value: 0.87

Habitat and sociology

  •   Occurrence in habitats ?
  •   1 Vegetation of cliffs, screes and walls
  • 1D Mobile calcareous screes: 1 - rare occurrence
  •   8 Dry grasslands
  • 8C Narow-leaved sub-continental steppes: 1 - rare occurrence
  • 8D Broad-leaved dry grasslands: 1 - rare occurrence
  •   9 Sand grasslands and rock-outcrop vegetation
  • 9F Basiphilous vegetation of spring therophytes and succulents: 1 - rare occurrence
  •   13 Anthropogenic vegetation
  • 13A Annual vegetation of ruderal habitats: 1 - rare occurrence
  • 13B Annual vegetation of arable land: 2 - optimum
  • 13C Annual vegetation of trampled habitats: 1 - rare occurrence
  • 13D Perennial thermophilous ruderal vegetation: 1 - rare occurrence
  •   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
  •   Diagnostic taxon ?
  •   Constant taxon ?
  •   Dominant taxon ?
  •   Ecological specialization indices ?
  • Ecological specialization index for all vegetation types: 6.3
  • Ecological specialization index for non-forest vegetation: 6.3

Distribution and frequency

  • Floristic zone: northern temperate, southern temperate, submeridional, meridional ?
  • Floristic region: Europe ?
  • Continentality degree: 4 ?
  • Distribution range extension along the continentality gradient: 4 ?
  • Elevational belt in the Czech Republic: lowlands, colline belt ?
  • Occurrence frequency in the basic grid mapping cells and in quadrants of the basic grid mapping cells: 262, 565 ?
  •   Commonness in vegetation plots from the Czech Republic ?
  • Occurrence frequency in vegetation plots: 0.9 %
  • Occurrence frequency in vegetation plots with a cover above 5%: 17 %
  • Occurrence frequency in vegetation plots with a cover above 25%: 1.9 %
  • Occurrence frequency in vegetation plots with a cover above 50%: 0 %
  • Mean percentage cover in vegetation plots: 4.9 %
  • Maximum percentage cover in vegetation plots: 42 %
  •   Number of habitats with taxon occurrence in the Czech Republic ?
  • Number of narrow habitats in which the taxon occurs: 8
  • Number of narrow habitats in which the taxon has its optimum: 1
  • Number of broad habitats in which the taxon occurs: 4
  • Number of broad habitats in which the taxon has its optimum: 1

Threats and protection

  • Red List 2017 (national categories): C4a - near threatened taxon ?
  • Red List 2017 (IUCN categories): NT - near threatened ?
  • Legal protection: not protected by law ?

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