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Saint-John’s-wort
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Rose of Sharon (Hypericum calycinum) Saint-John's-wort Saint-John's-wort
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Rose of Sharon (Hypericum calycinum)
Rose of Sharon (Hypericum calycinum)

Saint-John’s-wort

plant
Also known as: Ascyrum, Hypericum
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Britannica Editors
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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History

Saint-John’s-wort, (genus Hypericum), genus of nearly 500 species of herbs or low shrubs in the family Hypericaceae that are native to temperate and tropical areas. Several species are cultivated for their attractive flowers, and at least one, common Saint-John’s-wort (Hypericum perforatum), is important in herbalism. The common name stems from the fact that various European species flower around June 24, which is the feast day of St. John the Baptist; “wort” derives from an Old...

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