hypericum_perforatum
1. [ noun ] (botany) yellow-flowered perennial common in fields and waste places but a weed in rangelands
Synonyms: klammath_weed
Related terms: St_John's_wort
Similar spelling:   Hypericum_maculatum
  Hypericum_prolificum
  Hypericum_virginianum
  Hypericum_pyramidatum
  Hypericum_tetrapterum
  Hypericum_spathulatum
  Hypericum_calycinum
  Hypericum_crux_andrae
  Hypericum_hypericoides
  Hypericum_androsaemum