Hieracium rigorosum
Encyclopedia
Hieracium rigorosum, a name for a plant in the hawkweed genus Hieracium, has been identified as synonyms of two different species:
  • Hieracium canadense
  • Hieracium laevigatum
    Hieracium laevigatum
    Hieracium laevigatum or Smooth Hawkweed is very similar to Hieracium sabaudum and can be found on dry, more or less nutrient rich soil in light woods, grassy embankments and fields, or on walls.- Distribution :H...

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