St. John's-wort are bushy plants, on the tops of which will be found clusters of bright, 5-petaled, yellow flowers with dark dots on the edges and numerous stamens. The blooms of St. John's-wort will be found plentiful in the months of July and August.
St. John's-wort have a role to play for certain superstitious people; it use to be hung on doors and windows to ward off evil spirits; often it was brought out during thunder storms.
We read (Clevely) that the leaves are mildly sedative but that it makes the person photosensitive requiring the person to stay out of the sun. A dye can be made out of the flowers.