Specification :

St John' s wort St John' s wort Scientific classification

Kingdom: Plantae Division: Magnoliophyta Class: Magnoliopsida Order: Malpighiales Family: Clusiaceae

Genus: Hypericum Species: H. perforatum Binomial name Hypericum perforatum L. St John' s wort ( traditionally pronounced / s nz t/ , now sometimes the spelling pronunciation / t/ )

[ 1] is the plant species Hypericum perforatum, also known as Tipton' s Weed or Klamath weed, but, with qualifiers, is used to refer to any species of the genus Hypericum. Therefore, H. perforatum is sometimes called Common St John' s wort to differentiate it. The species of Hypericum have been placed by some in the family Hypericaceae, but more recently have been included in the Clusiaceae.

[ 2] Approximately 370 species of the genus Hypericum exist worldwide with a native geographical distribution including temperate and subtropical regions of North America, Europe, Asia Minor, Russia, India, and China. St. John' s wort is widely known as a herbal treatment for depression.