Authentic Wisconsin.  St. John's wort - Hypericum perforatum


St. John's Wort on bank of Marion Dunn Pond on July 20, 2020.


Above: St. John's wort on bank of Marion Dunn Pond in Madison, Wisconsin. (6/20/20).


St. John's wort - Hypericum perforatum (Introduced/Invasive)

St. John's wort grows from 2-3' tall.

The yellow, 5-parted flower petals have black dots near the edges.

Other names: Common Saint John's wort, perforate St. John's-wort, Klamath-weed.



St. John's Wort
(Hypericum perforatum)
by Scottish author, Elizabeth Gordon

Common St. John's Wort is a tramp,

But he's a jolly little scamp;

Scatters shis bloom along the way,

Like golden coins his way to pay.



For more information on the St. John's wort, visit Wikipedia.

Or, visit the UW-Madison Wisconsin State Herbarium website page about St. John's wort - Hypericum perforatum.


St. John's Wort on bank of Marion Dunn Pond on June 20, 2020.
St. John's Wort on bank of Marion Dunn Pond on June 20, 2020.
St. John's Wort on bank of Marion Dunn Pond on June 20, 2020.
St. John's Wort on bank of Marion Dunn Pond on June 20, 2020.
St. John's Wort on bank of Marion Dunn Pond on June 20, 2020.
St. John's Wort on bank of Marion Dunn Pond on June 20, 2020.
St. John's Wort on bank of Marion Dunn Pond on June 27, 2020.
St. John's Wort on bank of Marion Dunn Pond on June 29, 2020.
St. John's Wort on bank of Marion Dunn Pond on July 7, 2019.
St. John's Wort on bank of Marion Dunn Pond on June 21, 2021.
St. John's Wort on bank of Marion Dunn Pond on June 21, 2021.
St. John's Wort on bank of Marion Dunn Pond on June 21, 2021.
St. John's Wort on bank of Marion Dunn Pond on June 21, 2021.
St. John's Wort on bank of Marion Dunn Pond on June 21, 2021.
St. John's Wort on bank of Marion Dunn Pond on June 21, 2021.
St. John's Wort on bank of Marion Dunn Pond on June 21, 2021.
St. John's Wort on bank of Marion Dunn Pond on June 21, 2021.
St. John's Wort on bank of Marion Dunn Pond on June 21, 2021.

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Wisconsin Wildflowers


St. John's wort
Hypericum perforatum


St. John's Wort on bank of Marion Dunn Pond on June 21, 2021.

St. John's Wort on bank of Marion Dunn Pond on June 21, 2021.

St. John's Wort on bank of Marion Dunn Pond on June 21, 2021.

Above: St. John's Wort on bank of Marion Dunn Pond in Madison, Wisconsin. (6/21/21).


St. John's Wort on bank of Marion Dunn Pond on July 7, 2019.

St. John's Wort on bank of Marion Dunn Pond on July 7, 2019.

St. John's Wort on bank of Marion Dunn Pond on July 7, 2019.

St. John's Wort on bank of Marion Dunn Pond on July 7, 2019.

Above: St. John's Wort on bank of Marion Dunn Pond in Madison, Wisconsin. (7/7/19).


St. John's Wort on bank of Marion Dunn Pond on July 8, 2019.

St. John's Wort on bank of Marion Dunn Pond on July 8, 2019.

Above: St. John's Wort on bank of Marion Dunn Pond in Madison, Wisconsin. (7/8/19).


St. John's Wort on bank of Lake Wingra in Wingra Park on July 30, 2019.

Above: St. John's Wort on bank of Lake Wingra in Wingra Park in Madison, Wisconsin. (7/30/19).


St. John's Wort on bank of Marion Dunn Pond on June 28, 2020.

Above: St. John's Wort on bank of Marion Dunn Pond in Madison, Wisconsin. (6/28/20).


St. John's Wort botanical illustration circa 1917-1926.

Above:St. John's Wort botanical illustration circa 1917-1926.


St. John's Wort botanical illustration circa 1890-1893.

Above:St. John's Wort botanical illustration circa 1890-1893.



1918 St. John's Wort Wild Wild Flower Children by Elizabeth Gordon with illustration by Janet Laura Scott.

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