Rorippa palustris

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Habitus and growth type

  • Height [m]: 0.15–0.6
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  • Growth form: annual herb
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  • Life form: therophyte
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  • Life strategy: CR – competitor/ruderal
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  • Life strategy (Pierce method based on leaf traits): CR
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  • Life strategy (Pierce method, C-score): 39.7 %
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  • Life strategy (Pierce method, S-score): 0 %
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  • Life strategy (Pierce method, R-score): 60.3 %
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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 – pinnately divided
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  • Stipules: absent
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  • Petiole: present
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  • Leaf life span: summer green
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  • Leaf anatomy: helomorphic
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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: yellow
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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: racemus
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  • Dicliny: synoecious
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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 – silicula
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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): seed
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  • Dispersal strategy: Sparganium (mainly autochory and hydrochory)
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  • Myrmecochory: non-myrmecochorous (b)
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Belowground organs and clonality

  • Shoot life span (cyclicity): monocyclic shoots prevailing
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  • Primary root: present
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  • Position of root buds: primary root
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  • Role of root buds in life-history of a plant: additive
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  • Bud bank

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  • Number of buds per shoot at the soil surface (root buds excluded):
  • Number of buds per shoot at a depth of 0–10 cm (root buds excluded): 4
  • Number of buds per shoot at a depth greater than 10 cm (root buds excluded):
  • Size of the belowground bud bank (root buds excluded): 9
  • Depth of the belowground bud bank (root buds exluded) [cm]: 3
  • Number of buds per shoot at the soil surface (root buds included):
  • Number of buds per shoot at a depth of 0–10 cm (root buds included): 10
  • Number of buds per shoot at a depth greater than 10 cm (root buds included):
  • Size of the belowground bud bank (root buds included): 30
  • Depth of the belowground bud bank (root buds included) [cm]: 9

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): 32
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  • Ploidy level (x): 4
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  • 2C genome size [Mbp]: 1027.17
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  • 1Cx monoploid genome size [Mbp]: 256.79
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  • Genomic GC content: 39.3 %
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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: 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: 6 – transition between values 5 and 7
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  • Moisture indicator value: 9 – wetness indicator, focus on often soaked, poorly aerated soils
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  • Reaction indicator value: 6x – transition between values 5 and 7 (generalist)
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  • Nutrient indicator value: 7 – occurring at nutrient-rich sites more often than at average sites and only exceptionally at poor sites
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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: -0.37
  • Herb layer disturbance frequency indicator value: -0.34
  • Whole-community disturbance severity indicator value: 0.52
  • Herb layer disturbance severity indicator value: 0.53
  • Whole-community structure based disturbance indicator value: 0.66
  • Herb layer structure-based disturbance indicator value: 0.68

Habitat and sociology

  • Occurrence in habitats

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  • 3 Aquatic vegetation

  • 3C Macrophytic vegetation of oligotrophic lakes and pools: 2 – optimum
  • 4 Wetland and riverine herbaceous vegetation

  • 4A Reed-beds of eutrophic still waters: 1 – rare occurrence
  • 4B Halophilous reed and sedge beds: 1 – rare occurrence
  • 4C Eutrophic vegetation of muddy substrata: 2 – optimum
  • 4D Riverine reed vegetation: 2 – optimum
  • 4E Reed vegetation of brooks: 1 – rare occurrence
  • 4F Mesotrophic vegetation of muddy substrata: 1 – rare occurrence
  • 4G Tall-sedge beds: 1 – rare occurrence
  • 4H Vegetation of low annual hygrophilous herbs: 2 – optimum
  • 4I Vegetation of nitrophilous annual hygrophilous herbs: 3 – dominant
  • 6 Meadows and mesic pastures

  • 6G Vegetation of wet disturbed soils: 1 – rare occurrence
  • 10 Saline vegetation

  • 10I Inland saline meadows: 1 – rare occurrence
  • 11 Heathlands and scrub

  • 11J Willow galleries of loamy and sandy river banks: 1 – rare occurrence
  • 13 Anthropogenic vegetation

  • 13A Annual vegetation of ruderal habitats: 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: 4.7
  • Ecological specialization index for non-forest vegetation: 4.8
  • Ecological specialization index for forest vegetation: 5.3
  • Colonization ability

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  • Index of colonization success (ICS): 5
  • Index of colonization potential (ICP): 5
  • Optimum successional age [years]: 2

Distribution and frequency

  • Floristic zone: boreal, northern temperate, southern temperate, submeridional, meridional
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  • Floristic region: circumpolar
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  • Distribution range extension along the continentality gradient: 9
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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: 546, 1339
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  • Commonness in vegetation plots from the Czech Republic

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  • Occurrence frequency in vegetation plots: 2.2 %
  • Occurrence frequency in vegetation plots with a cover above 5%: 12.7 %
  • Occurrence frequency in vegetation plots with a cover above 25%: 2.6 %
  • Occurrence frequency in vegetation plots with a cover above 50%: 0.3 %
  • Mean percentage cover in vegetation plots: 4.2 %
  • 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: 14
  • Number of narrow habitats in which the taxon has its optimum: 5
  • Number of broad habitats in which the taxon occurs: 6
  • 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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