Orobanche alba subsp. major

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Habitus and growth type

  • Height [m]: 0.2–0.65
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  • Life form: geophyte
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Leaf

  • Leaf presence and metamorphosis: leaves reduced to scales
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  • Leaf shape: simple – entire
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  • Stipules: absent
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Flower

  • Flowering period [month]: June-July
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  • Flower colour: yellow-white, pink
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  • Flower symmetry: zygomorphic
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  • Perianth type: calyx and corolla
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  • Perianth fusion: fused
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  • Shape of the sympetalous corolla or syntepalous perianth: bilabiate
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  • Calyx fusion: synsepalous
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  • Inflorescence type: spica
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Fruit, seed and dispersal

  • Fruit type: dry fruit – capsule
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  • Dispersal unit (diaspore): seed
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  • Dispersal strategy: Lycopodium (mainly anemochory)
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  • Myrmecochory: non-myrmecochorous (b)
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Trophic mode

  • Parasitism and mycoheterotrophy: root holoparasite
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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: 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: 7 – heat indicator, occurring in relatively warm lowlands
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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: 3x – occurring at nutrient-poor sites more frequently than at average sites and exceptionally at rich sites (generalist)
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  • Salinity indicator value: 0 – not salt tolerant, glycophyte
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Habitat and sociology

  • 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

Distribution and frequency

  • Elevational belt in the Czech Republic: colline belt
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  • Occurrence frequency in the basic grid mapping cells and quadrants of the basic grid mapping cells: 20, 29
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Threats and protection

  • Red List 2017 (national categories): C2r – endangered taxon, rare
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  • Red List 2017 (IUCN categories): VU – vulnerable
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  • Legal protection: not protected by law
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