great St John's wort

Definitions of great St John's wort
  1. noun
    perennial shrub having large star-shaped yellow flowers in narrowly pyramidal cymes
    synonyms: Hypericum ascyron, Hypericum pyramidatum
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    type of:
    St John's wort
    any of numerous plants of the genus Hypericum having yellow flowers and transparently dotted leaves; traditionally gathered on St John's eve to ward off evil
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