Hypericum perforatum

Definitions of Hypericum perforatum
  1. noun
    yellow-flowered perennial common in fields and waste places but a weed in rangelands
    synonyms: klammath weed
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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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